Convert.ToSByte Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Converts a specified value to an 8-bit signed integer.
Overloads
| ToSByte(SByte) |
Returns the specified 8-bit signed integer; no actual conversion is performed. |
| ToSByte(String, Int32) |
Converts the string representation of a number in a specified base to an equivalent 8-bit signed integer. |
| ToSByte(String, IFormatProvider) |
Converts the specified string representation of a number to an equivalent 8-bit signed integer, using the specified culture-specific formatting information. |
| ToSByte(Object, IFormatProvider) |
Converts the value of the specified object to an 8-bit signed integer, using the specified culture-specific formatting information. |
| ToSByte(UInt64) |
Converts the value of the specified 64-bit unsigned integer to an equivalent 8-bit signed integer. |
| ToSByte(UInt32) |
Converts the value of the specified 32-bit unsigned integer to an equivalent 8-bit signed integer. |
| ToSByte(String) |
Converts the specified string representation of a number to an equivalent 8-bit signed integer. |
| ToSByte(Single) |
Converts the value of the specified single-precision floating-point number to an equivalent 8-bit signed integer. |
| ToSByte(Object) |
Converts the value of the specified object to an 8-bit signed integer. |
| ToSByte(UInt16) |
Converts the value of the specified 16-bit unsigned integer to the equivalent 8-bit signed integer. |
| ToSByte(Int32) |
Converts the value of the specified 32-bit signed integer to an equivalent 8-bit signed integer. |
| ToSByte(Int64) |
Converts the value of the specified 64-bit signed integer to an equivalent 8-bit signed integer. |
| ToSByte(Byte) |
Converts the value of the specified 8-bit unsigned integer to the equivalent 8-bit signed integer. |
| ToSByte(Char) |
Converts the value of the specified Unicode character to the equivalent 8-bit signed integer. |
| ToSByte(DateTime) |
Calling this method always throws InvalidCastException. |
| ToSByte(Boolean) |
Converts the specified Boolean value to the equivalent 8-bit signed integer. |
| ToSByte(Double) |
Converts the value of the specified double-precision floating-point number to an equivalent 8-bit signed integer. |
| ToSByte(Int16) |
Converts the value of the specified 16-bit signed integer to the equivalent 8-bit signed integer. |
| ToSByte(Decimal) |
Converts the value of the specified decimal number to an equivalent 8-bit signed integer. |
ToSByte(SByte)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Returns the specified 8-bit signed integer; no actual conversion is performed.
public:
static System::SByte ToSByte(System::SByte value);[System.CLSCompliant(false)]
public static sbyte ToSByte (sbyte value);[<System.CLSCompliant(false)>]
static member ToSByte : sbyte -> sbytePublic Shared Function ToSByte (value As SByte) As SByteParameters
- value
- SByte
The 8-bit signed integer to return.
Returns
value is returned unchanged.
- Attributes
Applies to
ToSByte(String, Int32)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the string representation of a number in a specified base to an equivalent 8-bit signed integer.
public:
static System::SByte ToSByte(System::String ^ value, int fromBase);[System.CLSCompliant(false)]
public static sbyte ToSByte (string value, int fromBase);[System.CLSCompliant(false)]
public static sbyte ToSByte (string? value, int fromBase);[<System.CLSCompliant(false)>]
static member ToSByte : string * int -> sbytePublic Shared Function ToSByte (value As String, fromBase As Integer) As SByteParameters
- value
- String
A string that contains the number to convert.
- fromBase
- Int32
The base of the number in value, which must be 2, 8, 10, or 16.
Returns
An 8-bit signed integer that is equivalent to the number in value, or 0 (zero) if value is null.
- Attributes
Exceptions
fromBase is not 2, 8, 10, or 16.
-or-
value, which represents a non-base 10 signed number, is prefixed with a negative sign.
value is Empty.
value contains a character that is not a valid digit in the base specified by fromBase. The exception message indicates that there are no digits to convert if the first character in value is invalid; otherwise, the message indicates that value contains invalid trailing characters.
value, which represents a non-base 10 signed number, is prefixed with a negative sign.
-or-
value represents a number that is less than SByte.MinValue or greater than SByte.MaxValue.
Examples
The following example attempts to interpret the elements in a string array as the binary, octal, and hexadecimal representation of numeric values in order to convert them to unsigned bytes.
using System;
public class Example
{
public static void Main()
{
int[] baseValues = { 2, 8, 16};
string[] values = { "FF", "81", "03", "11", "8F", "01", "1C", "111",
"123", "18A" };
// Convert to each supported base.
foreach (int baseValue in baseValues)
{
Console.WriteLine("Converting strings in base {0}:", baseValue);
foreach (string value in values)
{
Console.Write(" '{0,-5} --> ", value + "'");
try {
Console.WriteLine(Convert.ToSByte(value, baseValue));
}
catch (FormatException) {
Console.WriteLine("Bad Format");
}
catch (OverflowException) {
Console.WriteLine("Out of Range");
}
}
Console.WriteLine();
}
}
}
// The example displays the following output:
// Converting strings in base 2:
// 'FF' --> Bad Format
// '81' --> Bad Format
// '03' --> Bad Format
// '11' --> 3
// '8F' --> Bad Format
// '01' --> 1
// '1C' --> Bad Format
// '111' --> 7
// '123' --> Bad Format
// '18A' --> Bad Format
//
// Converting strings in base 8:
// 'FF' --> Bad Format
// '81' --> Bad Format
// '03' --> 3
// '11' --> 9
// '8F' --> Bad Format
// '01' --> 1
// '1C' --> Bad Format
// '111' --> 73
// '123' --> 83
// '18A' --> Bad Format
//
// Converting strings in base 16:
// 'FF' --> -1
// '81' --> -127
// '03' --> 3
// '11' --> 17
// '8F' --> -113
// '01' --> 1
// '1C' --> 28
// '111' --> Out of Range
// '123' --> Out of Range
// '18A' --> Out of Range
open System
let baseValues =
[| 2; 8; 16 |]
let values =
[| "FF"; "81"; "03"; "11"; "8F"; "01"; "1C"; "111"; "123"; "18A" |]
// Convert to each supported base.
for baseValue in baseValues do
printfn $"Converting strings in base {baseValue}:"
for value in values do
printf $""" '{value + "'",-5} --> """
try
printfn $"{Convert.ToSByte(value, baseValue)}"
with
| :? FormatException ->
printfn "Bad Format"
| :? OverflowException ->
printfn "Out of Range"
printfn ""
// The example displays the following output:
// Converting strings in base 2:
// 'FF' --> Bad Format
// '81' --> Bad Format
// '03' --> Bad Format
// '11' --> 3
// '8F' --> Bad Format
// '01' --> 1
// '1C' --> Bad Format
// '111' --> 7
// '123' --> Bad Format
// '18A' --> Bad Format
//
// Converting strings in base 8:
// 'FF' --> Bad Format
// '81' --> Bad Format
// '03' --> 3
// '11' --> 9
// '8F' --> Bad Format
// '01' --> 1
// '1C' --> Bad Format
// '111' --> 73
// '123' --> 83
// '18A' --> Bad Format
//
// Converting strings in base 16:
// 'FF' --> -1
// '81' --> -127
// '03' --> 3
// '11' --> 17
// '8F' --> -113
// '01' --> 1
// '1C' --> 28
// '111' --> Out of Range
// '123' --> Out of Range
// '18A' --> Out of Range
Module Example
Public Sub Main()
Dim bases() As Integer = { 2, 8, 16}
Dim values() As String = { "FF", "81", "03", "11", "8F", "01", "1C", _
"111", "123", "18A" }
' Convert to each supported base.
For Each base As Integer In bases
Console.WriteLine("Converting strings in base {0}:", base)
For Each value As String In values
Console.Write(" '{0,-5} --> ", value + "'")
Try
Console.WriteLine(Convert.ToSByte(value, base))
Catch e As FormatException
Console.WriteLine("Bad Format")
Catch e As OverflowException
Console.WriteLine("Out of Range")
End Try
Next
Console.WriteLine()
Next
End Sub
End Module
' The example displays the following output:
' Converting strings in base 2:
' 'FF' --> Bad Format
' '81' --> Bad Format
' '03' --> Bad Format
' '11' --> 3
' '8F' --> Bad Format
' '01' --> 1
' '1C' --> Bad Format
' '111' --> 7
' '123' --> Bad Format
' '18A' --> Bad Format
'
' Converting strings in base 8:
' 'FF' --> Bad Format
' '81' --> Bad Format
' '03' --> 3
' '11' --> 9
' '8F' --> Bad Format
' '01' --> 1
' '1C' --> Bad Format
' '111' --> 73
' '123' --> 83
' '18A' --> Bad Format
'
' Converting strings in base 16:
' 'FF' --> -1
' '81' --> -127
' '03' --> 3
' '11' --> 17
' '8F' --> -113
' '01' --> 1
' '1C' --> 28
' '111' --> Out of Range
' '123' --> Out of Range
' '18A' --> Out of Range
Remarks
If fromBase is 16, you can prefix the number specified by the value parameter with "0x" or "0X".
Because the negative sign is not supported for non-base 10 numeric representations, the ToSByte(String, Int32) method assumes that negative numbers use two's complement representation. In other words, the method always interprets the high-order bit of a byte (bit 7) as its sign bit. As a result, it is possible to write code in which a non-base 10 number that is out of the range of the SByte data type is converted to an SByte value without the method throwing an exception. The following example converts MaxValue to its hexadecimal string representation, and then calls the ToSByte(String, Int32) method. Instead of throwing an exception, the method displays the message, "0xff converts to -1."
// Create a hexadecimal value out of range of the SByte type.
string value = Convert.ToString(byte.MaxValue, 16);
// Convert it back to a number.
try
{
sbyte number = Convert.ToSByte(value, 16);
Console.WriteLine("0x{0} converts to {1}.", value, number);
}
catch (OverflowException)
{
Console.WriteLine("Unable to convert '0x{0}' to a signed byte.", value);
}
// Create a hexadecimal value out of range of the SByte type.
let value = Convert.ToString(Byte.MaxValue, 16)
// Convert it back to a number.
try
let number = Convert.ToSByte(value, 16)
printfn $"0x{value} converts to {number}."
with :? OverflowException ->
printfn $"Unable to convert '0x{value}' to a signed byte."
' Create a hexadecimal value out of range of the SByte type.
Dim value As String = Convert.ToString(Byte.MaxValue, 16)
' Convert it back to a number.
Try
Dim number As SByte = Convert.ToSByte(value, 16)
Console.WriteLine("0x{0} converts to {1}.", value, number)
Catch e As OverflowException
Console.WriteLine("Unable to convert '0x{0}' to a signed byte.", value)
End Try
When performing binary operations or numeric conversions, it is always the responsibility of the developer to verify that a method is using the appropriate numeric representation to interpret a particular value. As the following example illustrates, you can ensure that the method handles overflows appropriately by first determining whether a value represents an unsigned or a signed type when converting it to its hexadecimal string representation. Throw an exception if the original value was an unsigned type but the conversion back to a signed byte yields a value whose sign bit is on.
// Create a hexadecimal value out of range of the SByte type.
byte sourceNumber = byte.MaxValue;
bool isSigned = Math.Sign(Convert.ToDouble(sourceNumber.GetType().GetField("MinValue").GetValue(null))) == -1;
string value = Convert.ToString(sourceNumber, 16);
sbyte targetNumber;
try
{
targetNumber = Convert.ToSByte(value, 16);
if (!isSigned && ((targetNumber & 0x80) != 0))
throw new OverflowException();
else
Console.WriteLine("0x{0} converts to {1}.", value, targetNumber);
}
catch (OverflowException)
{
Console.WriteLine("Unable to convert '0x{0}' to a signed byte.", value);
}
// Displays the following to the console:
// Unable to convert '0xff' to a signed byte.
// Create a hexadecimal value out of range of the SByte type.
let sourceNumber = Byte.MaxValue
let isSigned = sign (Convert.ToDouble(sourceNumber.GetType().GetField("MinValue").GetValue null)) = -1
let value = Convert.ToString(sourceNumber, 16)
try
let targetNumber = Convert.ToSByte(value, 16)
if not isSigned && targetNumber &&& 0x80y <> 0y then
raise (OverflowException())
else
printfn $"0x{value} converts to {targetNumber}."
with :? OverflowException ->
printfn $"Unable to convert '0x{value}' to a signed byte."
// Displays the following to the console:
// Unable to convert '0xff' to a signed byte.
' Create a negative hexadecimal value out of range of the Long type.
Dim sourceNumber As Byte = Byte.MaxValue
Dim isSigned As Boolean = Math.Sign(sourceNumber.MinValue) = -1
Dim value As String = Convert.ToString(sourceNumber, 16)
Dim targetNumber As SByte
Try
targetNumber = Convert.ToSByte(value, 16)
If Not isSigned And ((targetNumber And &H80) <> 0) Then
Throw New OverflowException()
Else
Console.WriteLine("0x{0} converts to {1}.", value, targetNumber)
End If
Catch e As OverflowException
Console.WriteLine("Unable to convert '0x{0}' to a signed byte.", value)
End Try
' Displays the following to the console:
' Unable to convert '0xff' to a signed byte.
Applies to
ToSByte(String, IFormatProvider)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the specified string representation of a number to an equivalent 8-bit signed integer, using the specified culture-specific formatting information.
public:
static System::SByte ToSByte(System::String ^ value, IFormatProvider ^ provider);[System.CLSCompliant(false)]
public static sbyte ToSByte (string value, IFormatProvider provider);[System.CLSCompliant(false)]
public static sbyte ToSByte (string value, IFormatProvider? provider);[<System.CLSCompliant(false)>]
static member ToSByte : string * IFormatProvider -> sbytePublic Shared Function ToSByte (value As String, provider As IFormatProvider) As SByteParameters
- value
- String
A string that contains the number to convert.
- provider
- IFormatProvider
An object that supplies culture-specific formatting information.
Returns
An 8-bit signed integer that is equivalent to value.
- Attributes
Exceptions
value is null.
value does not consist of an optional sign followed by a sequence of digits (0 through 9).
value represents a number that is less than SByte.MinValue or greater than SByte.MaxValue.
Examples
The following example converts string representations of SByte values with the ToSByte method, using an IFormatProvider object.
// Example of the Convert::ToSByte( String* ) and
// Convert::ToSByte( String*, IFormatProvider* ) methods.
using namespace System;
using namespace System::Globalization;
const __wchar_t * protoFmt = L"{0,-20}{1,-20}{2}";
// Get the exception type name; remove the namespace prefix.
String^ GetExceptionType( Exception^ ex )
{
String^ exceptionType = ex->GetType()->ToString();
return exceptionType->Substring( exceptionType->LastIndexOf( '.' ) + 1 );
}
void ConvertToSByte( String^ numericStr, IFormatProvider^ provider )
{
Object^ defaultValue;
Object^ providerValue;
// Convert numericStr to SByte without a format provider.
try
{
defaultValue = Convert::ToSByte( numericStr );
}
catch ( Exception^ ex )
{
defaultValue = GetExceptionType( ex );
}
// Convert numericStr to SByte with a format provider.
try
{
providerValue = Convert::ToSByte( numericStr, provider );
}
catch ( Exception^ ex )
{
providerValue = GetExceptionType( ex );
}
Console::WriteLine( gcnew String( protoFmt ), numericStr, defaultValue, providerValue );
}
int main()
{
// Create a NumberFormatInfo object and set several of its
// properties that apply to numbers.
NumberFormatInfo^ provider = gcnew NumberFormatInfo;
// These properties affect the conversion.
provider->NegativeSign = "neg ";
provider->PositiveSign = "pos ";
// These properties do not affect the conversion.
// The input string cannot have decimal and group separators.
provider->NumberDecimalSeparator = ".";
provider->NumberNegativePattern = 0;
Console::WriteLine( "This example of\n"
" Convert::ToSByte( String* ) and \n"
" Convert::ToSByte( String*, IFormatProvider* ) "
"\ngenerates the following output. It converts "
"several strings to \nSByte values, using "
"default formatting or a NumberFormatInfo object.\n" );
Console::WriteLine( gcnew String( protoFmt ), "String to convert", "Default/exception", "Provider/exception" );
Console::WriteLine( gcnew String( protoFmt ), "-----------------", "-----------------", "------------------" );
// Convert strings, with and without an IFormatProvider.
ConvertToSByte( "123", provider );
ConvertToSByte( "+123", provider );
ConvertToSByte( "pos 123", provider );
ConvertToSByte( "-123", provider );
ConvertToSByte( "neg 123", provider );
ConvertToSByte( "123.", provider );
ConvertToSByte( "(123)", provider );
ConvertToSByte( "128", provider );
ConvertToSByte( "-129", provider );
}
/*
This example of
Convert::ToSByte( String* ) and
Convert::ToSByte( String*, IFormatProvider* )
generates the following output. It converts several strings to
SByte values, using default formatting or a NumberFormatInfo object.
String to convert Default/exception Provider/exception
----------------- ----------------- ------------------
123 123 123
+123 123 FormatException
pos 123 FormatException 123
-123 -123 FormatException
neg 123 FormatException -123
123. FormatException FormatException
(123) FormatException FormatException
128 OverflowException OverflowException
-129 OverflowException FormatException
*/
// Example of the Convert.ToSByte( string ) and
// Convert.ToSByte( string, IFormatProvider ) methods.
using System;
using System.Globalization;
class ToSByteProviderDemo
{
static string format = "{0,-20}{1,-20}{2}";
// Get the exception type name; remove the namespace prefix.
static string GetExceptionType( Exception ex )
{
string exceptionType = ex.GetType( ).ToString( );
return exceptionType.Substring(
exceptionType.LastIndexOf( '.' ) + 1 );
}
static void ConvertToSByte( string numericStr,
IFormatProvider provider )
{
object defaultValue;
object providerValue;
// Convert numericStr to SByte without a format provider.
try
{
defaultValue = Convert.ToSByte( numericStr );
}
catch( Exception ex )
{
defaultValue = GetExceptionType( ex );
}
// Convert numericStr to SByte with a format provider.
try
{
providerValue = Convert.ToSByte( numericStr, provider );
}
catch( Exception ex )
{
providerValue = GetExceptionType( ex );
}
Console.WriteLine( format, numericStr,
defaultValue, providerValue );
}
public static void Main( )
{
// Create a NumberFormatInfo object and set several of its
// properties that apply to numbers.
NumberFormatInfo provider = new NumberFormatInfo();
// These properties affect the conversion.
provider.NegativeSign = "neg ";
provider.PositiveSign = "pos ";
// These properties do not affect the conversion.
// The input string cannot have decimal and group separators.
provider.NumberDecimalSeparator = ".";
provider.NumberNegativePattern = 0;
Console.WriteLine("This example of\n" +
" Convert.ToSByte( string ) and \n" +
" Convert.ToSByte( string, IFormatProvider ) " +
"\ngenerates the following output. It converts " +
"several strings to \nSByte values, using " +
"default formatting or a NumberFormatInfo object.\n" );
Console.WriteLine( format, "String to convert",
"Default/exception", "Provider/exception" );
Console.WriteLine( format, "-----------------",
"-----------------", "------------------" );
// Convert strings, with and without an IFormatProvider.
ConvertToSByte( "123", provider );
ConvertToSByte( "+123", provider );
ConvertToSByte( "pos 123", provider );
ConvertToSByte( "-123", provider );
ConvertToSByte( "neg 123", provider );
ConvertToSByte( "123.", provider );
ConvertToSByte( "(123)", provider );
ConvertToSByte( "128", provider );
ConvertToSByte( "-129", provider );
}
}
/*
This example of
Convert.ToSByte( string ) and
Convert.ToSByte( string, IFormatProvider )
generates the following output. It converts several strings to
SByte values, using default formatting or a NumberFormatInfo object.
String to convert Default/exception Provider/exception
----------------- ----------------- ------------------
123 123 123
+123 123 FormatException
pos 123 FormatException 123
-123 -123 FormatException
neg 123 FormatException -123
123. FormatException FormatException
(123) FormatException FormatException
128 OverflowException OverflowException
-129 OverflowException FormatException
*/
// Example of the Convert.ToSByte( string ) and
// Convert.ToSByte( string, IFormatProvider ) methods.
open System
open System.Globalization
let format obj1 obj2 obj3 = printfn $"{obj1,-20}{obj2,-20}{obj3}"
// Get the exception type name; remove the namespace prefix.
let getExceptionType (ex: exn) =
let exceptionType = ex.GetType() |> string
exceptionType.Substring(exceptionType.LastIndexOf '.' + 1 )
let convertToSByte (numericStr: string) (provider: IFormatProvider) =
// Convert numericStr to SByte without a format provider.
let defaultValue =
try
Convert.ToSByte numericStr
|> string
with ex ->
getExceptionType ex
// Convert numericStr to SByte with a format provider.
let providerValue =
try
Convert.ToSByte(numericStr, provider)
|> string
with ex ->
getExceptionType ex
format numericStr defaultValue providerValue
// Create a NumberFormatInfo object and set several of its
// properties that apply to numbers.
let provider = NumberFormatInfo()
// These properties affect the conversion.
provider.NegativeSign <- "neg "
provider.PositiveSign <- "pos "
// These properties do not affect the conversion.
// The input string cannot have decimal and group separators.
provider.NumberDecimalSeparator <- "."
provider.NumberNegativePattern <- 0
printfn
"""This example of
Convert.ToSByte( string ) and
Convert.ToSByte( string, IFormatProvider )
generates the following output. It converts several strings to
SByte values, using default formatting or a NumberFormatInfo object.
"""
format "String to convert" "Default/exception" "Provider/exception"
format "-----------------" "-----------------" "------------------"
// Convert strings, with and without an IFormatProvider.
convertToSByte "123" provider
convertToSByte "+123" provider
convertToSByte "pos 123" provider
convertToSByte "-123" provider
convertToSByte "neg 123" provider
convertToSByte "123." provider
convertToSByte "(123)" provider
convertToSByte "128" provider
convertToSByte "-129" provider
// This example of
// Convert.ToSByte( string ) and
// Convert.ToSByte( string, IFormatProvider )
// generates the following output. It converts several strings to
// SByte values, using default formatting or a NumberFormatInfo object.
// String to convert Default/exception Provider/exception
// ----------------- ----------------- ------------------
// 123 123 123
// +123 123 FormatException
// pos 123 FormatException 123
// -123 -123 FormatException
// neg 123 FormatException -123
// 123. FormatException FormatException
// (123) FormatException FormatException
// 128 OverflowException OverflowException
// -129 OverflowException FormatException
' Example of the Convert.ToSByte( String ) and
' Convert.ToSByte( String, IFormatProvider ) methods.
Imports System.Globalization
Module ToSByteProviderDemo
Dim format As String = "{0,-20}{1,-20}{2}"
' Get the exception type name; remove the namespace prefix.
Function GetExceptionType( ex As Exception ) As String
Dim exceptionType As String = ex.GetType( ).ToString( )
Return exceptionType.Substring( _
exceptionType.LastIndexOf( "."c ) + 1 )
End Function
Sub ConvertToSByte( numericStr As String, _
provider As IFormatProvider )
Dim defaultValue As Object
Dim providerValue As Object
' Convert numericStr to SByte without a format provider.
Try
defaultValue = Convert.ToSByte( numericStr )
Catch ex As Exception
defaultValue = GetExceptionType( ex )
End Try
' Convert numericStr to SByte with a format provider.
Try
providerValue = Convert.ToSByte( numericStr, provider )
Catch ex As Exception
providerValue = GetExceptionType( ex )
End Try
Console.WriteLine( format, numericStr, _
defaultValue, providerValue )
End Sub
Sub Main( )
' Create a NumberFormatInfo object and set several of its
' properties that apply to numbers.
Dim provider As NumberFormatInfo = new NumberFormatInfo( )
' These properties affect the conversion.
provider.NegativeSign = "neg "
provider.PositiveSign = "pos "
' These properties do not affect the conversion.
' The input string cannot have decimal and group separators.
provider.NumberDecimalSeparator = "."
provider.NumberNegativePattern = 0
Console.WriteLine( "This example of" & vbCrLf & _
" Convert.ToSByte( String ) and " & vbCrLf & _
" Convert.ToSByte( String, IFormatProvider ) " & _
vbCrLf & "generates the following output. It " & _
"converts several strings to " & vbCrLf & "SByte " & _
"values, using default formatting " & _
"or a NumberFormatInfo object." & vbCrLf )
Console.WriteLine( format, "String to convert", _
"Default/exception", "Provider/exception" )
Console.WriteLine( format, "-----------------", _
"-----------------", "------------------" )
' Convert strings, with and without an IFormatProvider.
ConvertToSByte( "123", provider )
ConvertToSByte( "+123", provider )
ConvertToSByte( "pos 123", provider )
ConvertToSByte( "-123", provider )
ConvertToSByte( "neg 123", provider )
ConvertToSByte( "123.", provider )
ConvertToSByte( "(123)", provider )
ConvertToSByte( "128", provider )
ConvertToSByte( "-129", provider )
End Sub
End Module
' This example of
' Convert.ToSByte( String ) and
' Convert.ToSByte( String, IFormatProvider )
' generates the following output. It converts several strings to
' SByte values, using default formatting or a NumberFormatInfo object.
'
' String to convert Default/exception Provider/exception
' ----------------- ----------------- ------------------
' 123 123 123
' +123 123 FormatException
' pos 123 FormatException 123
' -123 -123 FormatException
' neg 123 FormatException -123
' 123. FormatException FormatException
' (123) FormatException FormatException
' 128 OverflowException OverflowException
' -129 OverflowException FormatException
Remarks
provider is an IFormatProvider instance that obtains a NumberFormatInfo object. The NumberFormatInfo object provides culture-specific information about the format of value. If provider is null, the NumberFormatInfo for the current culture is used.
If you prefer not to handle an exception if the conversion fails, you can call the SByte.TryParse method instead. It returns a Boolean value that indicates whether the conversion succeeded or failed.
See also
Applies to
ToSByte(Object, IFormatProvider)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the value of the specified object to an 8-bit signed integer, using the specified culture-specific formatting information.
public:
static System::SByte ToSByte(System::Object ^ value, IFormatProvider ^ provider);[System.CLSCompliant(false)]
public static sbyte ToSByte (object value, IFormatProvider provider);[System.CLSCompliant(false)]
public static sbyte ToSByte (object? value, IFormatProvider? provider);[<System.CLSCompliant(false)>]
static member ToSByte : obj * IFormatProvider -> sbytePublic Shared Function ToSByte (value As Object, provider As IFormatProvider) As SByteParameters
- value
- Object
An object that implements the IConvertible interface.
- provider
- IFormatProvider
An object that supplies culture-specific formatting information.
Returns
An 8-bit signed integer that is equivalent to value, or zero if value is null.
- Attributes
Exceptions
value is not in an appropriate format.
value represents a number that is less than SByte.MinValue or greater than SByte.MaxValue.
Examples
The following example defines a ByteString class that stores both signed and unsigned bytes as hexadecimal strings along with a field that indicates the sign of the byte. The ByteString class implements the IConvertible interface. Its IConvertible.ToSByte method calls the Parse(String, IFormatProvider) method to perform the conversion. If it fails, it throws an OverflowException.
using System;
using System.Globalization;
public enum SignBit { Negative=-1, Zero=0, Positive=1 };
public struct ByteString : IConvertible
{
private SignBit signBit;
private string byteString;
public SignBit Sign
{
set { signBit = value; }
get { return signBit; }
}
public string Value
{
set {
if (value.Trim().Length > 2)
throw new ArgumentException("The string representation of a byte cannot have more than two characters.");
else
byteString = value;
}
get { return byteString; }
}
// IConvertible implementations.
public TypeCode GetTypeCode() {
return TypeCode.Object;
}
public bool ToBoolean(IFormatProvider provider)
{
if (signBit == SignBit.Zero)
return false;
else
return true;
}
public byte ToByte(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
throw new OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToSByte(byteString, 16)));
else
return Byte.Parse(byteString, NumberStyles.HexNumber);
}
public char ToChar(IFormatProvider provider)
{
if (signBit == SignBit.Negative) {
throw new OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToSByte(byteString, 16)));
}
else {
byte byteValue = Byte.Parse(this.byteString, NumberStyles.HexNumber);
return Convert.ToChar(byteValue);
}
}
public DateTime ToDateTime(IFormatProvider provider)
{
throw new InvalidCastException("ByteString to DateTime conversion is not supported.");
}
public decimal ToDecimal(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
{
sbyte byteValue = SByte.Parse(byteString, NumberStyles.HexNumber);
return Convert.ToDecimal(byteValue);
}
else
{
byte byteValue = Byte.Parse(byteString, NumberStyles.HexNumber);
return Convert.ToDecimal(byteValue);
}
}
public double ToDouble(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
return Convert.ToDouble(SByte.Parse(byteString, NumberStyles.HexNumber));
else
return Convert.ToDouble(Byte.Parse(byteString, NumberStyles.HexNumber));
}
public short ToInt16(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
return Convert.ToInt16(SByte.Parse(byteString, NumberStyles.HexNumber));
else
return Convert.ToInt16(Byte.Parse(byteString, NumberStyles.HexNumber));
}
public int ToInt32(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
return Convert.ToInt32(SByte.Parse(byteString, NumberStyles.HexNumber));
else
return Convert.ToInt32(Byte.Parse(byteString, NumberStyles.HexNumber));
}
public long ToInt64(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
return Convert.ToInt64(SByte.Parse(byteString, NumberStyles.HexNumber));
else
return Convert.ToInt64(Byte.Parse(byteString, NumberStyles.HexNumber));
}
public sbyte ToSByte(IFormatProvider provider)
{
try {
return SByte.Parse(byteString, NumberStyles.HexNumber);
}
catch (OverflowException e) {
throw new OverflowException(String.Format("{0} is outside the range of the SByte type.",
Byte.Parse(byteString, NumberStyles.HexNumber)), e);
}
}
public float ToSingle(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
return Convert.ToSingle(SByte.Parse(byteString, NumberStyles.HexNumber));
else
return Convert.ToSingle(Byte.Parse(byteString, NumberStyles.HexNumber));
}
public string ToString(IFormatProvider provider)
{
return "0x" + this.byteString;
}
public object ToType(Type conversionType, IFormatProvider provider)
{
switch (Type.GetTypeCode(conversionType))
{
case TypeCode.Boolean:
return this.ToBoolean(null);
case TypeCode.Byte:
return this.ToByte(null);
case TypeCode.Char:
return this.ToChar(null);
case TypeCode.DateTime:
return this.ToDateTime(null);
case TypeCode.Decimal:
return this.ToDecimal(null);
case TypeCode.Double:
return this.ToDouble(null);
case TypeCode.Int16:
return this.ToInt16(null);
case TypeCode.Int32:
return this.ToInt32(null);
case TypeCode.Int64:
return this.ToInt64(null);
case TypeCode.Object:
if (typeof(ByteString).Equals(conversionType))
return this;
else
throw new InvalidCastException(String.Format("Conversion to a {0} is not supported.", conversionType.Name));
case TypeCode.SByte:
return this.ToSByte(null);
case TypeCode.Single:
return this.ToSingle(null);
case TypeCode.String:
return this.ToString(null);
case TypeCode.UInt16:
return this.ToUInt16(null);
case TypeCode.UInt32:
return this.ToUInt32(null);
case TypeCode.UInt64:
return this.ToUInt64(null);
default:
throw new InvalidCastException(String.Format("Conversion to {0} is not supported.", conversionType.Name));
}
}
public UInt16 ToUInt16(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
throw new OverflowException(String.Format("{0} is outside the range of the UInt16 type.",
SByte.Parse(byteString, NumberStyles.HexNumber)));
else
return Convert.ToUInt16(Byte.Parse(byteString, NumberStyles.HexNumber));
}
public UInt32 ToUInt32(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
throw new OverflowException(String.Format("{0} is outside the range of the UInt32 type.",
SByte.Parse(byteString, NumberStyles.HexNumber)));
else
return Convert.ToUInt32(Byte.Parse(byteString, NumberStyles.HexNumber));
}
public UInt64 ToUInt64(IFormatProvider provider)
{
if (signBit == SignBit.Negative)
throw new OverflowException(String.Format("{0} is outside the range of the UInt64 type.",
SByte.Parse(byteString, NumberStyles.HexNumber)));
else
return Convert.ToUInt64(Byte.Parse(byteString, NumberStyles.HexNumber));
}
}
open System
open System.Globalization
type SignBit =
| Negative = -1
| Zero = 0
| Positive = 1
[<Struct>]
type ByteString =
val mutable private byteString: string
val mutable Sign : SignBit
member this.Value
with get () = this.byteString
and set (value: string) =
if value.Trim().Length > 2 then
invalidArg "value" "The string representation of a byte cannot have more than two characters."
this.byteString <- value
// IConvertible implementations.
interface IConvertible with
member _.GetTypeCode() =
TypeCode.Object
member this.ToBoolean(provider: IFormatProvider) =
this.Sign <> SignBit.Zero
member this.ToByte(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
raise (OverflowException $"{Convert.ToSByte(this.byteString, 16)} is out of range of the Byte type.")
else
Byte.Parse(this.byteString, NumberStyles.HexNumber)
member this.ToChar(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
raise (OverflowException $"{Convert.ToSByte(this.byteString, 16)} is out of range of the Char type.")
else
let byteValue = Byte.Parse(this.byteString, NumberStyles.HexNumber)
Convert.ToChar byteValue
member _.ToDateTime(provider: IFormatProvider) =
raise (InvalidCastException "ByteString to DateTime conversion is not supported.")
member this.ToDecimal(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
SByte.Parse(this.byteString, NumberStyles.HexNumber)
|> Convert.ToDecimal
else
Byte.Parse(this.byteString, NumberStyles.HexNumber)
|> Convert.ToDecimal
member this.ToDouble(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
SByte.Parse(this.byteString, NumberStyles.HexNumber)
|> Convert.ToDouble
else
Byte.Parse(this.byteString, NumberStyles.HexNumber)
|> Convert.ToDouble
member this.ToInt16(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
SByte.Parse(this.byteString, NumberStyles.HexNumber)
|> Convert.ToInt16
else
Byte.Parse(this.byteString, NumberStyles.HexNumber)
|> Convert.ToInt16
member this.ToInt32(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
SByte.Parse(this.byteString, NumberStyles.HexNumber)
|> Convert.ToInt32
else
Byte.Parse(this.byteString, NumberStyles.HexNumber)
|> Convert.ToInt32
member this.ToInt64(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
SByte.Parse(this.byteString, NumberStyles.HexNumber)
|> Convert.ToInt64
else
Byte.Parse(this.byteString, NumberStyles.HexNumber)
|> Convert.ToInt64
member this.ToSByte(provider: IFormatProvider) =
try
SByte.Parse(this.byteString, NumberStyles.HexNumber)
with :? OverflowException as e ->
raise (OverflowException($"{Byte.Parse(this.byteString, NumberStyles.HexNumber)} is outside the range of the SByte type.", e) )
member this.ToSingle(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
SByte.Parse(this.byteString, NumberStyles.HexNumber)
|> Convert.ToSingle
else
Byte.Parse(this.byteString, NumberStyles.HexNumber)
|> Convert.ToSingle
member this.ToString(provider: IFormatProvider) =
"0x" + this.byteString
member this.ToType(conversionType: Type, provider: IFormatProvider) =
let this = this :> IConvertible
match Type.GetTypeCode conversionType with
| TypeCode.Boolean ->
this.ToBoolean null
| TypeCode.Byte ->
this.ToByte null
| TypeCode.Char ->
this.ToChar null
| TypeCode.DateTime ->
this.ToDateTime null
| TypeCode.Decimal ->
this.ToDecimal null
| TypeCode.Double ->
this.ToDouble null
| TypeCode.Int16 ->
this.ToInt16 null
| TypeCode.Int32 ->
this.ToInt32 null
| TypeCode.Int64 ->
this.ToInt64 null
| TypeCode.Object ->
if typeof<ByteString>.Equals conversionType then
this
else
raise (InvalidCastException $"Conversion to a {conversionType.Name} is not supported.")
| TypeCode.SByte ->
this.ToSByte null
| TypeCode.Single ->
this.ToSingle null
| TypeCode.String ->
this.ToString null
| TypeCode.UInt16 ->
this.ToUInt16 null
| TypeCode.UInt32 ->
this.ToUInt32 null
| TypeCode.UInt64 ->
this.ToUInt64 null
| _ ->
raise (InvalidCastException $"Conversion to {conversionType.Name} is not supported.")
member this.ToUInt16(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
raise (OverflowException $"{SByte.Parse(this.byteString, NumberStyles.HexNumber)} is outside the range of the UInt16 type." )
else
Byte.Parse(this.byteString, NumberStyles.HexNumber)
|> Convert.ToUInt16
member this.ToUInt32(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
raise (OverflowException $"{SByte.Parse(this.byteString, NumberStyles.HexNumber)} is outside the range of the UInt32 type.")
else
Byte.Parse(this.byteString, NumberStyles.HexNumber)
|> Convert.ToUInt32
member this.ToUInt64(provider: IFormatProvider) =
if this.Sign = SignBit.Negative then
raise (OverflowException $"{SByte.Parse(this.byteString, NumberStyles.HexNumber)} is outside the range of the UInt32 type.")
else
Byte.Parse(this.byteString, NumberStyles.HexNumber)
|> Convert.ToUInt64
Imports System.Globalization
Public Enum SignBit As Integer
Positive = 1
Zero = 0
Negative = -1
End Enum
Public Structure ByteString : Implements IConvertible
Private signBit As SignBit
Private byteString As String
Public Property Sign As SignBit
Set
signBit = value
End Set
Get
Return signBit
End Get
End Property
Public Property Value As String
Set
If value.Trim().Length > 2 Then
Throw New ArgumentException("The string representation of a byte cannot have more than two characters.")
Else
byteString = value
End If
End Set
Get
Return byteString
End Get
End Property
' IConvertible implementations.
Public Function GetTypeCode() As TypeCode _
Implements IConvertible.GetTypeCode
Return TypeCode.Object
End Function
Public Function ToBoolean(provider As IFormatProvider) As Boolean _
Implements IConvertible.ToBoolean
If signBit = SignBit.Zero Then
Return False
Else
Return True
End If
End Function
Public Function ToByte(provider As IFormatProvider) As Byte _
Implements IConvertible.ToByte
If signBit = signBit.Negative Then
Throw New OverflowException(String.Format("{0} is out of range of the Byte type.", Convert.ToSByte(byteString, 16)))
Else
Return Byte.Parse(byteString, NumberStyles.HexNumber)
End If
End Function
Public Function ToChar(provider As IFormatProvider) As Char _
Implements IConvertible.ToChar
If signBit = signBit.Negative Then
Throw New OverflowException(String.Format("{0} is out of range of the Char type.", Convert.ToSByte(byteString, 16)))
Else
Dim byteValue As Byte = Byte.Parse(Me.byteString, NumberStyles.HexNumber)
Return Convert.ToChar(byteValue)
End If
End Function
Public Function ToDateTime(provider As IFormatProvider) As Date _
Implements IConvertible.ToDateTime
Throw New InvalidCastException("ByteString to DateTime conversion is not supported.")
End Function
Public Function ToDecimal(provider As IFormatProvider) As Decimal _
Implements IConvertible.ToDecimal
If signBit = signBit.Negative Then
Dim byteValue As SByte = SByte.Parse(byteString, NumberStyles.HexNumber)
Return Convert.ToDecimal(byteValue)
Else
Dim byteValue As Byte = Byte.Parse(byteString, NumberStyles.HexNumber)
Return Convert.ToDecimal(byteValue)
End If
End Function
Public Function ToDouble(provider As IFormatProvider) As Double _
Implements IConvertible.ToDouble
If signBit = signBit.Negative Then
Return Convert.ToDouble(SByte.Parse(byteString, NumberStyles.HexNumber))
Else
Return Convert.ToDouble(Byte.Parse(byteString, NumberStyles.HexNumber))
End If
End Function
Public Function ToInt16(provider As IFormatProvider) As Int16 _
Implements IConvertible.ToInt16
If signBit = signBit.Negative Then
Return Convert.ToInt16(SByte.Parse(byteString, NumberStyles.HexNumber))
Else
Return Convert.ToInt16(Byte.Parse(byteString, NumberStyles.HexNumber))
End If
End Function
Public Function ToInt32(provider As IFormatProvider) As Int32 _
Implements IConvertible.ToInt32
If signBit = signBit.Negative Then
Return Convert.ToInt32(SByte.Parse(byteString, NumberStyles.HexNumber))
Else
Return Convert.ToInt32(Byte.Parse(byteString, NumberStyles.HexNumber))
End If
End Function
Public Function ToInt64(provider As IFormatProvider) As Int64 _
Implements IConvertible.ToInt64
If signBit = signBit.Negative Then
Return Convert.ToInt64(SByte.Parse(byteString, NumberStyles.HexNumber))
Else
Return Convert.ToInt64(Byte.Parse(byteString, NumberStyles.HexNumber))
End If
End Function
Public Function ToSByte(provider As IFormatProvider) As SByte _
Implements IConvertible.ToSByte
Try
Return SByte.Parse(byteString, NumberStyles.HexNumber)
Catch e As OverflowException
Throw New OverflowException(String.Format("{0} is outside the range of the SByte type.", _
Byte.Parse(byteString, NumberStyles.HexNumber)))
End Try
End Function
Public Function ToSingle(provider As IFormatProvider) As Single _
Implements IConvertible.ToSingle
If signBit = signBit.Negative Then
Return Convert.ToSingle(SByte.Parse(byteString, NumberStyles.HexNumber))
Else
Return Convert.ToSingle(Byte.Parse(byteString, NumberStyles.HexNumber))
End If
End Function
Public Overloads Function ToString(provider As IFormatProvider) As String _
Implements IConvertible.ToString
Return Me.byteString
End Function
Public Function ToType(conversionType As Type, provider As IFormatProvider) As Object _
Implements IConvertible.ToType
Select Case Type.GetTypeCode(conversionType)
Case TypeCode.Boolean
Return Me.ToBoolean(Nothing)
Case TypeCode.Byte
Return Me.ToByte(Nothing)
Case TypeCode.Char
Return Me.ToChar(Nothing)
Case TypeCode.DateTime
Return Me.ToDateTime(Nothing)
Case TypeCode.Decimal
Return Me.ToDecimal(Nothing)
Case TypeCode.Double
Return Me.ToDouble(Nothing)
Case TypeCode.Int16
Return Me.ToInt16(Nothing)
Case TypeCode.Int32
Return Me.ToInt32(Nothing)
Case TypeCode.Int64
Return Me.ToInt64(Nothing)
Case TypeCode.Object
If GetType(ByteString).Equals(conversionType) Then
Return Me
Else
Throw New InvalidCastException(String.Format("Conversion to a {0} is not supported.", conversionType.Name))
End If
Case TypeCode.SByte
Return Me.ToSByte(Nothing)
Case TypeCode.Single
Return Me.ToSingle(Nothing)
Case TypeCode.String
Return Me.ToString(Nothing)
Case TypeCode.UInt16
Return Me.ToUInt16(Nothing)
Case TypeCode.UInt32
Return Me.ToUInt32(Nothing)
Case TypeCode.UInt64
Return Me.ToUInt64(Nothing)
Case Else
Throw New InvalidCastException(String.Format("Conversion to {0} is not supported.", conversionType.Name))
End Select
End Function
Public Function ToUInt16(provider As IFormatProvider) As UInt16 _
Implements IConvertible.ToUInt16
If signBit = signBit.Negative Then
Throw New OverflowException(String.Format("{0} is outside the range of the UInt16 type.", _
SByte.Parse(byteString, NumberStyles.HexNumber)))
Else
Return Convert.ToUInt16(Byte.Parse(byteString, NumberStyles.HexNumber))
End If
End Function
Public Function ToUInt32(provider As IFormatProvider) As UInt32 _
Implements IConvertible.ToUInt32
If signBit = signBit.Negative Then
Throw New OverflowException(String.Format("{0} is outside the range of the UInt32 type.", _
SByte.Parse(byteString, NumberStyles.HexNumber)))
Else
Return Convert.ToUInt32(Byte.Parse(byteString, NumberStyles.HexNumber))
End If
End Function
Public Function ToUInt64(provider As IFormatProvider) As UInt64 _
Implements IConvertible.ToUInt64
If signBit = signBit.Negative Then
Throw New OverflowException(String.Format("{0} is outside the range of the UInt64 type.", _
SByte.Parse(byteString, NumberStyles.HexNumber)))
Else
Return Convert.ToUInt64(Byte.Parse(byteString, NumberStyles.HexNumber))
End If
End Function
End Structure
The following example shows how the IConvertible.ToSByte implementation of the ByteString class is called by the Convert.ToSByte(Object, IFormatProvider) method.
public class Class1
{
public static void Main()
{
sbyte positiveByte = 120;
sbyte negativeByte = -101;
ByteString positiveString = new ByteString();
positiveString.Sign = (SignBit) Math.Sign(positiveByte);
positiveString.Value = positiveByte.ToString("X2");
ByteString negativeString = new ByteString();
negativeString.Sign = (SignBit) Math.Sign(negativeByte);
negativeString.Value = negativeByte.ToString("X2");
try {
Console.WriteLine("'{0}' converts to {1}.", positiveString.Value, Convert.ToSByte(positiveString));
}
catch (OverflowException) {
Console.WriteLine("0x{0} is outside the range of the Byte type.", positiveString.Value);
}
try {
Console.WriteLine("'{0}' converts to {1}.", negativeString.Value, Convert.ToSByte(negativeString));
}
catch (OverflowException) {
Console.WriteLine("0x{0} is outside the range of the Byte type.", negativeString.Value);
}
}
}
// The example displays the following output:
// '78' converts to 120.
// '9B' converts to -101.
let positiveByte = 120y
let negativeByte = -101y
let mutable positiveString = ByteString()
positiveString.Sign <- sign positiveByte |> enum
positiveString.Value <- positiveByte.ToString "X2"
let mutable negativeString = ByteString()
negativeString.Sign <- sign negativeByte |> enum
negativeString.Value <- negativeByte.ToString "X2"
try
printfn $"'{positiveString.Value}' converts to {Convert.ToSByte positiveString}."
with :? OverflowException ->
printfn $"0x{positiveString.Value} is outside the range of the Byte type."
try
printfn $"'{negativeString.Value}' converts to {Convert.ToSByte negativeString}."
with :? OverflowException ->
printfn $"0x{negativeString.Value} is outside the range of the Byte type."
// The example displays the following output:
// '78' converts to 120.
// '9B' converts to -101.
Module modMain
Public Sub Main()
Dim positiveByte As SByte = 120
Dim negativeByte As SByte = -101
Dim positiveString As New ByteString()
positiveString.Sign = CType(Math.Sign(positiveByte), SignBit)
positiveString.Value = positiveByte.ToString("X2")
Dim negativeString As New ByteString()
negativeString.Sign = CType(Math.Sign(negativeByte), SignBit)
negativeString.Value = negativeByte.ToString("X2")
Try
Console.WriteLine("'{0}' converts to {1}.", positiveString.Value, Convert.ToSByte(positiveString))
Catch e As OverflowException
Console.WriteLine("0x{0} is outside the range of the Byte type.", positiveString.Value)
End Try
Try
Console.WriteLine("'{0}' converts to {1}.", negativeString.Value, Convert.ToSByte(negativeString))
Catch e As OverflowException
Console.WriteLine("0x{0} is outside the range of the Byte type.", negativeString.Value)
End Try
End Sub
End Module
' The example dosplays the following output:
' '78' converts to 120.
' '9B' converts to -101.
Remarks
provider enables the user to specify culture-specific conversion information about the contents of value. For example, if value is a String that represents a number, provider could supply culture-specific information about the notation used to represent that number.
The base types ignore provider; however, the parameter may be used if value is a user-defined type that implements the IConvertible interface.
Applies to
ToSByte(UInt64)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the value of the specified 64-bit unsigned integer to an equivalent 8-bit signed integer.
public:
static System::SByte ToSByte(System::UInt64 value);[System.CLSCompliant(false)]
public static sbyte ToSByte (ulong value);[<System.CLSCompliant(false)>]
static member ToSByte : uint64 -> sbytePublic Shared Function ToSByte (value As ULong) As SByteParameters
- value
- UInt64
The 64-bit unsigned integer to convert.
Returns
An 8-bit signed integer that is equivalent to value.
- Attributes
Exceptions
value is greater than SByte.MaxValue or less than SByte.MinValue.
Examples
The following example attempts to convert each element in an array of long integers to a signed byte.
ulong[] numbers = { UInt64.MinValue, 121, 340, UInt64.MaxValue };
sbyte result;
foreach (ulong number in numbers)
{
try {
result = Convert.ToSByte(number);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
number.GetType().Name, number,
result.GetType().Name, result);
}
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
number.GetType().Name, number);
}
}
// The example displays the following output:
// Converted the UInt64 value 0 to the SByte value 0.
// Converted the UInt64 value 121 to the SByte value 121.
// The UInt64 value 340 is outside the range of the SByte type.
// The UInt64 value 18446744073709551615 is outside the range of the SByte type.
let numbers =
[| UInt32.MinValue; 121u; 340u; UInt32.MaxValue |]
for number in numbers do
try
let result = Convert.ToSByte number
printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn $"The {number.GetType().Name} value {number} is outside the range of the SByte type."
// The example displays the following output:
// Converted the UInt32 value 0 to the SByte value 0.
// Converted the UInt32 value 121 to the SByte value 121.
// Converted the UInt32 value 340 to the SByte value 340.
// The UInt32 value 4294967295 is outside the range of the SByte type.
Dim numbers() As ULong = { UInt64.MinValue, 121, 340, UInt64.MaxValue }
Dim result As SByte
For Each number As ULong In numbers
Try
result = Convert.ToSByte(number)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
number.GetType().Name, number, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.", _
number.GetType().Name, number)
End Try
Next
' The example displays the following output:
' Converted the UInt64 value 0 to the SByte value 0.
' Converted the UInt64 value 121 to the SByte value 121.
' The UInt64 value 340 is outside the range of the SByte type.
' The UInt64 value 18446744073709551615 is outside the range of the SByte type.
Applies to
ToSByte(UInt32)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the value of the specified 32-bit unsigned integer to an equivalent 8-bit signed integer.
public:
static System::SByte ToSByte(System::UInt32 value);[System.CLSCompliant(false)]
public static sbyte ToSByte (uint value);[<System.CLSCompliant(false)>]
static member ToSByte : uint32 -> sbytePublic Shared Function ToSByte (value As UInteger) As SByteParameters
- value
- UInt32
The 32-bit unsigned integer to convert.
Returns
An 8-bit signed integer that is equivalent to value.
- Attributes
Exceptions
value is greater than SByte.MaxValue or less than SByte.MinValue.
Examples
The following example attempts to convert each element in an integer array to a signed byte.
uint[] numbers = { UInt32.MinValue, 121, 340, UInt32.MaxValue };
sbyte result;
foreach (uint number in numbers)
{
try {
result = Convert.ToSByte(number);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
number.GetType().Name, number,
result.GetType().Name, result);
}
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
number.GetType().Name, number);
}
}
// The example displays the following output:
// Converted the UInt32 value 0 to the SByte value 0.
// Converted the UInt32 value 121 to the SByte value 121.
// The UInt32 value 340 is outside the range of the SByte type.
// The UInt32 value 4294967295 is outside the range of the SByte type.
let numbers =
[| UInt16.MinValue; 121us; 340us; UInt16.MaxValue |]
for number in numbers do
try
let result = Convert.ToSByte number
printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn $"The {number.GetType().Name} value {number} is outside the range of the SByte type."
// The example displays the following output:
// Converted the UInt16 value 0 to the SByte value 0.
// Converted the UInt16 value 121 to the SByte value 121.
// Converted the UInt16 value 340 to the SByte value 340.
// Converted the UInt16 value 65535 to the SByte value 65535.
Dim numbers() As UInteger = { UInt32.MinValue, 121, 340, UInt32.MaxValue }
Dim result As SByte
For Each number As UInteger In numbers
Try
result = Convert.ToSByte(number)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
number.GetType().Name, number, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.", _
number.GetType().Name, number)
End Try
Next
' The example displays the following output:
' Converted the UInt32 value 0 to the SByte value 0.
' Converted the UInt32 value 121 to the SByte value 121.
' The UInt32 value 340 is outside the range of the SByte type.
' The UInt32 value 4294967295 is outside the range of the SByte type.
Applies to
ToSByte(String)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the specified string representation of a number to an equivalent 8-bit signed integer.
public:
static System::SByte ToSByte(System::String ^ value);[System.CLSCompliant(false)]
public static sbyte ToSByte (string value);[System.CLSCompliant(false)]
public static sbyte ToSByte (string? value);[<System.CLSCompliant(false)>]
static member ToSByte : string -> sbytePublic Shared Function ToSByte (value As String) As SByteParameters
- value
- String
A string that contains the number to convert.
Returns
An 8-bit signed integer that is equivalent to the number in value, or 0 (zero) if value is null.
- Attributes
Exceptions
value does not consist of an optional sign followed by a sequence of digits (0 through 9).
value represents a number that is less than SByte.MinValue or greater than SByte.MaxValue.
Examples
The following example converts string representations of SByte values with the ToSByte method, using default formatting.
// Example of the Convert::ToSByte( String* ) and
// Convert::ToSByte( String*, IFormatProvider* ) methods.
using namespace System;
using namespace System::Globalization;
const __wchar_t * protoFmt = L"{0,-20}{1,-20}{2}";
// Get the exception type name; remove the namespace prefix.
String^ GetExceptionType( Exception^ ex )
{
String^ exceptionType = ex->GetType()->ToString();
return exceptionType->Substring( exceptionType->LastIndexOf( '.' ) + 1 );
}
void ConvertToSByte( String^ numericStr, IFormatProvider^ provider )
{
Object^ defaultValue;
Object^ providerValue;
// Convert numericStr to SByte without a format provider.
try
{
defaultValue = Convert::ToSByte( numericStr );
}
catch ( Exception^ ex )
{
defaultValue = GetExceptionType( ex );
}
// Convert numericStr to SByte with a format provider.
try
{
providerValue = Convert::ToSByte( numericStr, provider );
}
catch ( Exception^ ex )
{
providerValue = GetExceptionType( ex );
}
Console::WriteLine( gcnew String( protoFmt ), numericStr, defaultValue, providerValue );
}
int main()
{
// Create a NumberFormatInfo object and set several of its
// properties that apply to numbers.
NumberFormatInfo^ provider = gcnew NumberFormatInfo;
// These properties affect the conversion.
provider->NegativeSign = "neg ";
provider->PositiveSign = "pos ";
// These properties do not affect the conversion.
// The input string cannot have decimal and group separators.
provider->NumberDecimalSeparator = ".";
provider->NumberNegativePattern = 0;
Console::WriteLine( "This example of\n"
" Convert::ToSByte( String* ) and \n"
" Convert::ToSByte( String*, IFormatProvider* ) "
"\ngenerates the following output. It converts "
"several strings to \nSByte values, using "
"default formatting or a NumberFormatInfo object.\n" );
Console::WriteLine( gcnew String( protoFmt ), "String to convert", "Default/exception", "Provider/exception" );
Console::WriteLine( gcnew String( protoFmt ), "-----------------", "-----------------", "------------------" );
// Convert strings, with and without an IFormatProvider.
ConvertToSByte( "123", provider );
ConvertToSByte( "+123", provider );
ConvertToSByte( "pos 123", provider );
ConvertToSByte( "-123", provider );
ConvertToSByte( "neg 123", provider );
ConvertToSByte( "123.", provider );
ConvertToSByte( "(123)", provider );
ConvertToSByte( "128", provider );
ConvertToSByte( "-129", provider );
}
/*
This example of
Convert::ToSByte( String* ) and
Convert::ToSByte( String*, IFormatProvider* )
generates the following output. It converts several strings to
SByte values, using default formatting or a NumberFormatInfo object.
String to convert Default/exception Provider/exception
----------------- ----------------- ------------------
123 123 123
+123 123 FormatException
pos 123 FormatException 123
-123 -123 FormatException
neg 123 FormatException -123
123. FormatException FormatException
(123) FormatException FormatException
128 OverflowException OverflowException
-129 OverflowException FormatException
*/
// Example of the Convert.ToSByte( string ) and
// Convert.ToSByte( string, IFormatProvider ) methods.
using System;
using System.Globalization;
class ToSByteProviderDemo
{
static string format = "{0,-20}{1,-20}{2}";
// Get the exception type name; remove the namespace prefix.
static string GetExceptionType( Exception ex )
{
string exceptionType = ex.GetType( ).ToString( );
return exceptionType.Substring(
exceptionType.LastIndexOf( '.' ) + 1 );
}
static void ConvertToSByte( string numericStr,
IFormatProvider provider )
{
object defaultValue;
object providerValue;
// Convert numericStr to SByte without a format provider.
try
{
defaultValue = Convert.ToSByte( numericStr );
}
catch( Exception ex )
{
defaultValue = GetExceptionType( ex );
}
// Convert numericStr to SByte with a format provider.
try
{
providerValue = Convert.ToSByte( numericStr, provider );
}
catch( Exception ex )
{
providerValue = GetExceptionType( ex );
}
Console.WriteLine( format, numericStr,
defaultValue, providerValue );
}
public static void Main( )
{
// Create a NumberFormatInfo object and set several of its
// properties that apply to numbers.
NumberFormatInfo provider = new NumberFormatInfo();
// These properties affect the conversion.
provider.NegativeSign = "neg ";
provider.PositiveSign = "pos ";
// These properties do not affect the conversion.
// The input string cannot have decimal and group separators.
provider.NumberDecimalSeparator = ".";
provider.NumberNegativePattern = 0;
Console.WriteLine("This example of\n" +
" Convert.ToSByte( string ) and \n" +
" Convert.ToSByte( string, IFormatProvider ) " +
"\ngenerates the following output. It converts " +
"several strings to \nSByte values, using " +
"default formatting or a NumberFormatInfo object.\n" );
Console.WriteLine( format, "String to convert",
"Default/exception", "Provider/exception" );
Console.WriteLine( format, "-----------------",
"-----------------", "------------------" );
// Convert strings, with and without an IFormatProvider.
ConvertToSByte( "123", provider );
ConvertToSByte( "+123", provider );
ConvertToSByte( "pos 123", provider );
ConvertToSByte( "-123", provider );
ConvertToSByte( "neg 123", provider );
ConvertToSByte( "123.", provider );
ConvertToSByte( "(123)", provider );
ConvertToSByte( "128", provider );
ConvertToSByte( "-129", provider );
}
}
/*
This example of
Convert.ToSByte( string ) and
Convert.ToSByte( string, IFormatProvider )
generates the following output. It converts several strings to
SByte values, using default formatting or a NumberFormatInfo object.
String to convert Default/exception Provider/exception
----------------- ----------------- ------------------
123 123 123
+123 123 FormatException
pos 123 FormatException 123
-123 -123 FormatException
neg 123 FormatException -123
123. FormatException FormatException
(123) FormatException FormatException
128 OverflowException OverflowException
-129 OverflowException FormatException
*/
// Example of the Convert.ToSByte( string ) and
// Convert.ToSByte( string, IFormatProvider ) methods.
open System
open System.Globalization
let format obj1 obj2 obj3 = printfn $"{obj1,-20}{obj2,-20}{obj3}"
// Get the exception type name; remove the namespace prefix.
let getExceptionType (ex: exn) =
let exceptionType = ex.GetType() |> string
exceptionType.Substring(exceptionType.LastIndexOf '.' + 1 )
let convertToSByte (numericStr: string) (provider: IFormatProvider) =
// Convert numericStr to SByte without a format provider.
let defaultValue =
try
Convert.ToSByte numericStr
|> string
with ex ->
getExceptionType ex
// Convert numericStr to SByte with a format provider.
let providerValue =
try
Convert.ToSByte(numericStr, provider)
|> string
with ex ->
getExceptionType ex
format numericStr defaultValue providerValue
// Create a NumberFormatInfo object and set several of its
// properties that apply to numbers.
let provider = NumberFormatInfo()
// These properties affect the conversion.
provider.NegativeSign <- "neg "
provider.PositiveSign <- "pos "
// These properties do not affect the conversion.
// The input string cannot have decimal and group separators.
provider.NumberDecimalSeparator <- "."
provider.NumberNegativePattern <- 0
printfn
"""This example of
Convert.ToSByte( string ) and
Convert.ToSByte( string, IFormatProvider )
generates the following output. It converts several strings to
SByte values, using default formatting or a NumberFormatInfo object.
"""
format "String to convert" "Default/exception" "Provider/exception"
format "-----------------" "-----------------" "------------------"
// Convert strings, with and without an IFormatProvider.
convertToSByte "123" provider
convertToSByte "+123" provider
convertToSByte "pos 123" provider
convertToSByte "-123" provider
convertToSByte "neg 123" provider
convertToSByte "123." provider
convertToSByte "(123)" provider
convertToSByte "128" provider
convertToSByte "-129" provider
// This example of
// Convert.ToSByte( string ) and
// Convert.ToSByte( string, IFormatProvider )
// generates the following output. It converts several strings to
// SByte values, using default formatting or a NumberFormatInfo object.
// String to convert Default/exception Provider/exception
// ----------------- ----------------- ------------------
// 123 123 123
// +123 123 FormatException
// pos 123 FormatException 123
// -123 -123 FormatException
// neg 123 FormatException -123
// 123. FormatException FormatException
// (123) FormatException FormatException
// 128 OverflowException OverflowException
// -129 OverflowException FormatException
' Example of the Convert.ToSByte( String ) and
' Convert.ToSByte( String, IFormatProvider ) methods.
Imports System.Globalization
Module ToSByteProviderDemo
Dim format As String = "{0,-20}{1,-20}{2}"
' Get the exception type name; remove the namespace prefix.
Function GetExceptionType( ex As Exception ) As String
Dim exceptionType As String = ex.GetType( ).ToString( )
Return exceptionType.Substring( _
exceptionType.LastIndexOf( "."c ) + 1 )
End Function
Sub ConvertToSByte( numericStr As String, _
provider As IFormatProvider )
Dim defaultValue As Object
Dim providerValue As Object
' Convert numericStr to SByte without a format provider.
Try
defaultValue = Convert.ToSByte( numericStr )
Catch ex As Exception
defaultValue = GetExceptionType( ex )
End Try
' Convert numericStr to SByte with a format provider.
Try
providerValue = Convert.ToSByte( numericStr, provider )
Catch ex As Exception
providerValue = GetExceptionType( ex )
End Try
Console.WriteLine( format, numericStr, _
defaultValue, providerValue )
End Sub
Sub Main( )
' Create a NumberFormatInfo object and set several of its
' properties that apply to numbers.
Dim provider As NumberFormatInfo = new NumberFormatInfo( )
' These properties affect the conversion.
provider.NegativeSign = "neg "
provider.PositiveSign = "pos "
' These properties do not affect the conversion.
' The input string cannot have decimal and group separators.
provider.NumberDecimalSeparator = "."
provider.NumberNegativePattern = 0
Console.WriteLine( "This example of" & vbCrLf & _
" Convert.ToSByte( String ) and " & vbCrLf & _
" Convert.ToSByte( String, IFormatProvider ) " & _
vbCrLf & "generates the following output. It " & _
"converts several strings to " & vbCrLf & "SByte " & _
"values, using default formatting " & _
"or a NumberFormatInfo object." & vbCrLf )
Console.WriteLine( format, "String to convert", _
"Default/exception", "Provider/exception" )
Console.WriteLine( format, "-----------------", _
"-----------------", "------------------" )
' Convert strings, with and without an IFormatProvider.
ConvertToSByte( "123", provider )
ConvertToSByte( "+123", provider )
ConvertToSByte( "pos 123", provider )
ConvertToSByte( "-123", provider )
ConvertToSByte( "neg 123", provider )
ConvertToSByte( "123.", provider )
ConvertToSByte( "(123)", provider )
ConvertToSByte( "128", provider )
ConvertToSByte( "-129", provider )
End Sub
End Module
' This example of
' Convert.ToSByte( String ) and
' Convert.ToSByte( String, IFormatProvider )
' generates the following output. It converts several strings to
' SByte values, using default formatting or a NumberFormatInfo object.
'
' String to convert Default/exception Provider/exception
' ----------------- ----------------- ------------------
' 123 123 123
' +123 123 FormatException
' pos 123 FormatException 123
' -123 -123 FormatException
' neg 123 FormatException -123
' 123. FormatException FormatException
' (123) FormatException FormatException
' 128 OverflowException OverflowException
' -129 OverflowException FormatException
Remarks
Using the ToSByte(String) method is equivalent to passing value to the SByte.Parse(String) method. value is interpreted by using the formatting conventions of the current culture.
If you prefer not to handle an exception if the conversion fails, you can call the SByte.TryParse method instead. It returns a Boolean value that indicates whether the conversion succeeded or failed.
See also
Applies to
ToSByte(Single)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the value of the specified single-precision floating-point number to an equivalent 8-bit signed integer.
public:
static System::SByte ToSByte(float value);[System.CLSCompliant(false)]
public static sbyte ToSByte (float value);[<System.CLSCompliant(false)>]
static member ToSByte : single -> sbytePublic Shared Function ToSByte (value As Single) As SByteParameters
- value
- Single
The single-precision floating-point number to convert.
Returns
value, rounded to the nearest 8-bit signed integer. If value is halfway between two whole numbers, the even number is returned; that is, 4.5 is converted to 4, and 5.5 is converted to 6.
- Attributes
Exceptions
value is greater than SByte.MaxValue or less than SByte.MinValue.
Examples
The following example attempts to convert each element in an array of Single values to a signed byte.
object[] values = { true, -12, 163, 935, 'x', "104", "103.0", "-1",
"1.00e2", "One", 1.00e2};
sbyte result;
foreach (object value in values)
{
try {
result = Convert.ToSByte(value);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
value.GetType().Name, value,
result.GetType().Name, result);
}
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
value.GetType().Name, value);
}
catch (FormatException) {
Console.WriteLine("The {0} value {1} is not in a recognizable format.",
value.GetType().Name, value);
}
catch (InvalidCastException) {
Console.WriteLine("No conversion to a Byte exists for the {0} value {1}.",
value.GetType().Name, value);
}
}
// The example displays the following output:
// Converted the Boolean value true to the SByte value 1.
// Converted the Int32 value -12 to the SByte value -12.
// The Int32 value 163 is outside the range of the SByte type.
// The Int32 value 935 is outside the range of the SByte type.
// Converted the Char value x to the SByte value 120.
// Converted the String value 104 to the SByte value 104.
// The String value 103.0 is not in a recognizable format.
// Converted the String value -1 to the SByte value -1.
// The String value 1.00e2 is not in a recognizable format.
// The String value One is not in a recognizable format.
// Converted the Double value 100 to the SByte value 100.
let values: obj[] =
[| true; -12; 163; 935; 'x'; DateTime(2009, 5, 12)
"104"; "103.0"; "-1"
"1.00e2"; "One"; 1.00e2; 16.3e42 |]
for value in values do
try
let result = Convert.ToSByte value
printfn $"Converted the {value.GetType().Name} value {value} to the {result.GetType().Name} value {result}."
with
| :? OverflowException ->
printfn $"The {value.GetType().Name} value {value} is outside the range of the SByte type."
| :? FormatException ->
printfn $"The {value.GetType().Name} value {value} is not in a recognizable format."
| :? InvalidCastException ->
printfn $"No conversion to an SByte exists for the {value.GetType().Name} value {value}."
// The example displays the following output:
// Converted the Boolean value True to the SByte value 1.
// Converted the Int32 value -12 to the SByte value -12.
// Converted the Int32 value 163 to the SByte value 163.
// Converted the Int32 value 935 to the SByte value 935.
// Converted the Char value x to the SByte value 120.
// No conversion to an SByte exists for the DateTime value 5/12/2009 12:00:00 AM.
// Converted the String value 104 to the SByte value 104.
// The String value 103.0 is not in a recognizable format.
// Converted the String value -1 to the SByte value -1.
// The String value 1.00e2 is not in a recognizable format.
// The String value One is not in a recognizable format.
// Converted the Double value 100 to the SByte value 100.
// The Double value 1.63E+43 is outside the range of the SByte type.
Dim values() As Object = { True, -12, 163, 935, "x"c, "104", "103.0", "-1", _
"1.00e2", "One", 1.00e2}
Dim result As SByte
For Each value As Object In values
Try
result = Convert.ToSByte(value)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
value.GetType().Name, value, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.", _
value.GetType().Name, value)
Catch e As FormatException
Console.WriteLine("The {0} value {1} is not in a recognizable format.", _
value.GetType().Name, value)
Catch e As InvalidCastException
Console.WriteLine("No conversion to a Byte exists for the {0} value {1}.", _
value.GetType().Name, value)
End Try
Next
' The example displays the following output:
' Converted the Boolean value True to the SByte value 1.
' Converted the Int32 value -12 to the SByte value -12.
' The Int32 value 163 is outside the range of the SByte type.
' The Int32 value 935 is outside the range of the SByte type.
' Converted the Char value x to the SByte value 120.
' Converted the String value 104 to the SByte value 104.
' The String value 103.0 is not in a recognizable format.
' Converted the String value -1 to the SByte value -1.
' The String value 1.00e2 is not in a recognizable format.
' The String value One is not in a recognizable format.
' Converted the Double value 100 to the SByte value 100.
See also
Applies to
ToSByte(Object)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the value of the specified object to an 8-bit signed integer.
public:
static System::SByte ToSByte(System::Object ^ value);[System.CLSCompliant(false)]
public static sbyte ToSByte (object value);[System.CLSCompliant(false)]
public static sbyte ToSByte (object? value);[<System.CLSCompliant(false)>]
static member ToSByte : obj -> sbytePublic Shared Function ToSByte (value As Object) As SByteParameters
- value
- Object
An object that implements the IConvertible interface, or null.
Returns
An 8-bit signed integer that is equivalent to value, or zero if value is null.
- Attributes
Exceptions
value is not in an appropriate format.
value represents a number that is less than SByte.MinValue or greater than SByte.MaxValue.
Examples
The following example attempts to convert each element in an object array to a signed byte.
object[] values = { true, -12, 163, 935, 'x', "104", "103.0", "-1",
"1.00e2", "One", 1.00e2};
sbyte result;
foreach (object value in values)
{
try {
result = Convert.ToSByte(value);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
value.GetType().Name, value,
result.GetType().Name, result);
}
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
value.GetType().Name, value);
}
catch (FormatException) {
Console.WriteLine("The {0} value {1} is not in a recognizable format.",
value.GetType().Name, value);
}
catch (InvalidCastException) {
Console.WriteLine("No conversion to a Byte exists for the {0} value {1}.",
value.GetType().Name, value);
}
}
// The example displays the following output:
// Converted the Boolean value true to the SByte value 1.
// Converted the Int32 value -12 to the SByte value -12.
// The Int32 value 163 is outside the range of the SByte type.
// The Int32 value 935 is outside the range of the SByte type.
// Converted the Char value x to the SByte value 120.
// Converted the String value 104 to the SByte value 104.
// The String value 103.0 is not in a recognizable format.
// Converted the String value -1 to the SByte value -1.
// The String value 1.00e2 is not in a recognizable format.
// The String value One is not in a recognizable format.
// Converted the Double value 100 to the SByte value 100.
let values: obj[] =
[| true; -12; 163; 935; 'x'; DateTime(2009, 5, 12)
"104"; "103.0"; "-1"
"1.00e2"; "One"; 1.00e2; 16.3e42 |]
for value in values do
try
let result = Convert.ToSByte value
printfn $"Converted the {value.GetType().Name} value {value} to the {result.GetType().Name} value {result}."
with
| :? OverflowException ->
printfn $"The {value.GetType().Name} value {value} is outside the range of the SByte type."
| :? FormatException ->
printfn $"The {value.GetType().Name} value {value} is not in a recognizable format."
| :? InvalidCastException ->
printfn $"No conversion to an SByte exists for the {value.GetType().Name} value {value}."
// The example displays the following output:
// Converted the Boolean value True to the SByte value 1.
// Converted the Int32 value -12 to the SByte value -12.
// Converted the Int32 value 163 to the SByte value 163.
// Converted the Int32 value 935 to the SByte value 935.
// Converted the Char value x to the SByte value 120.
// No conversion to an SByte exists for the DateTime value 5/12/2009 12:00:00 AM.
// Converted the String value 104 to the SByte value 104.
// The String value 103.0 is not in a recognizable format.
// Converted the String value -1 to the SByte value -1.
// The String value 1.00e2 is not in a recognizable format.
// The String value One is not in a recognizable format.
// Converted the Double value 100 to the SByte value 100.
// The Double value 1.63E+43 is outside the range of the SByte type.
Dim values() As Object = { True, -12, 163, 935, "x"c, "104", "103.0", "-1", _
"1.00e2", "One", 1.00e2}
Dim result As SByte
For Each value As Object In values
Try
result = Convert.ToSByte(value)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
value.GetType().Name, value, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.", _
value.GetType().Name, value)
Catch e As FormatException
Console.WriteLine("The {0} value {1} is not in a recognizable format.", _
value.GetType().Name, value)
Catch e As InvalidCastException
Console.WriteLine("No conversion to a Byte exists for the {0} value {1}.", _
value.GetType().Name, value)
End Try
Next
' The example displays the following output:
' Converted the Boolean value True to the SByte value 1.
' Converted the Int32 value -12 to the SByte value -12.
' The Int32 value 163 is outside the range of the SByte type.
' The Int32 value 935 is outside the range of the SByte type.
' Converted the Char value x to the SByte value 120.
' Converted the String value 104 to the SByte value 104.
' The String value 103.0 is not in a recognizable format.
' Converted the String value -1 to the SByte value -1.
' The String value 1.00e2 is not in a recognizable format.
' The String value One is not in a recognizable format.
' Converted the Double value 100 to the SByte value 100.
Remarks
The return value is the result of invoking the IConvertible.ToSByte method of the underlying type of value.
Applies to
ToSByte(UInt16)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the value of the specified 16-bit unsigned integer to the equivalent 8-bit signed integer.
public:
static System::SByte ToSByte(System::UInt16 value);[System.CLSCompliant(false)]
public static sbyte ToSByte (ushort value);[<System.CLSCompliant(false)>]
static member ToSByte : uint16 -> sbytePublic Shared Function ToSByte (value As UShort) As SByteParameters
- value
- UInt16
The 16-bit unsigned integer to convert.
Returns
An 8-bit signed integer that is equivalent to value.
- Attributes
Exceptions
value is greater than SByte.MaxValue.
Examples
The following example attempts to convert each element in an array of unsigned 16-bit integers to a signed byte.
ushort[] numbers = { UInt16.MinValue, 121, 340, UInt16.MaxValue };
sbyte result;
foreach (ushort number in numbers)
{
try {
result = Convert.ToSByte(number);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
number.GetType().Name, number,
result.GetType().Name, result);
}
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
number.GetType().Name, number);
}
}
// The example displays the following output:
// Converted the UInt16 value 0 to the SByte value 0.
// Converted the UInt16 value 121 to the SByte value 121.
// The UInt16 value 340 is outside the range of the SByte type.
// The UInt16 value 65535 is outside the range of the SByte type.
let values =
[| "One"; "1.34e28"; "-26.87"; "-18"; "-6.00"
" 0"; "137"; "1601.9"; string Int32.MaxValue |]
for value in values do
try
let result = Convert.ToSByte value
printfn $"Converted the {value.GetType().Name} value {value} to the {result.GetType().Name} value {result}."
with
| :? OverflowException ->
printfn $"{value} is outside the range of the SByte type."
| :? FormatException ->
printfn $"The {value.GetType().Name} value '{value}' is not in a recognizable format."
// The example displays the following output:
// The String value 'One' is not in a recognizable format.
// The String value '1.34e28' is not in a recognizable format.
// The String value '-26.87' is not in a recognizable format.
// Converted the String value '-18' to the SByte value -18.
// The String value '-6.00' is not in a recognizable format.
// Converted the String value ' 0' to the SByte value 0.
// Converted the String value '137' to the SByte value 137.
// The String value '1601.9' is not in a recognizable format.
// Converted the String value '2147483647' to the SByte value 2147483647.
Dim numbers() As UShort = { UInt16.MinValue, 121, 340, UInt16.MaxValue }
Dim result As SByte
For Each number As UShort In numbers
Try
result = Convert.ToSByte(number)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
number.GetType().Name, number, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.", _
number.GetType().Name, number)
End Try
Next
' The example displays the following output:
' Converted the UInt16 value 0 to the SByte value 0.
' Converted the UInt16 value 121 to the SByte value 121.
' The UInt16 value 340 is outside the range of the SByte type.
' The UInt16 value 65535 is outside the range of the SByte type.
Applies to
ToSByte(Int32)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the value of the specified 32-bit signed integer to an equivalent 8-bit signed integer.
public:
static System::SByte ToSByte(int value);[System.CLSCompliant(false)]
public static sbyte ToSByte (int value);[<System.CLSCompliant(false)>]
static member ToSByte : int -> sbytePublic Shared Function ToSByte (value As Integer) As SByteParameters
- value
- Int32
The 32-bit signed integer to convert.
Returns
An 8-bit signed integer that is equivalent to value.
- Attributes
Exceptions
value is greater than SByte.MaxValue or less than SByte.MinValue.
Examples
The following example attempts to convert each element in an array of signed integers to a signed byte.
int[] numbers = { Int32.MinValue, -1, 0, 121, 340, Int32.MaxValue };
sbyte result;
foreach (int number in numbers)
{
try {
result = Convert.ToSByte(number);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
number.GetType().Name, number,
result.GetType().Name, result);
}
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
number.GetType().Name, number);
}
}
// The example displays the following output:
// The Int32 value -2147483648 is outside the range of the SByte type.
// Converted the Int32 value -1 to the SByte value -1.
// Converted the Int32 value 0 to the SByte value 0.
// Converted the Int32 value 121 to the SByte value 121.
// The Int32 value 340 is outside the range of the SByte type.
// The Int32 value 2147483647 is outside the range of the SByte type.
let numbers =
[| Int32.MinValue; -1; 0; 121; 340; Int32.MaxValue |]
for number in numbers do
try
let result = Convert.ToSByte number
printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn $"The {number.GetType().Name} value {number} is outside the range of the SByte type."
// The example displays the following output:
// The Int32 value -2147483647 is outside the range of the SByte type.
// Converted the Int32 value -1 to the SByte value -1.
// Converted the Int32 value 0 to the SByte value 0.
// Converted the Int32 value 121 to the SByte value 121.
// Converted the Int32 value 340 to the SByte value 340.
// The Int32 value 2147483647 is outside the range of the SByte type.
Dim numbers() As Integer = { Int32.MinValue, -1, 0, 121, 340, Int32.MaxValue }
Dim result As SByte
For Each number As Integer In numbers
Try
result = Convert.ToSByte(number)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
number.GetType().Name, number, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.", _
number.GetType().Name, number)
End Try
Next
' The example displays the following output:
' The Int32 value -2147483648 is outside the range of the SByte type.
' Converted the Int32 value -1 to the SByte value -1.
' Converted the Int32 value 0 to the SByte value 0.
' Converted the Int32 value 121 to the SByte value 121.
' The Int32 value 340 is outside the range of the SByte type.
' The Int32 value 2147483647 is outside the range of the SByte type.
Applies to
ToSByte(Int64)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the value of the specified 64-bit signed integer to an equivalent 8-bit signed integer.
public:
static System::SByte ToSByte(long value);[System.CLSCompliant(false)]
public static sbyte ToSByte (long value);[<System.CLSCompliant(false)>]
static member ToSByte : int64 -> sbytePublic Shared Function ToSByte (value As Long) As SByteParameters
- value
- Int64
The 64-bit signed integer to convert.
Returns
An 8-bit signed integer that is equivalent to value.
- Attributes
Exceptions
value is greater than SByte.MaxValue or less than SByte.MinValue.
Examples
The following example attempts to convert each element in an array of long integers to a signed byte.
long[] numbers = { Int64.MinValue, -1, 0, 121, 340, Int64.MaxValue };
sbyte result;
foreach (long number in numbers)
{
try {
result = Convert.ToSByte(number);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
number.GetType().Name, number,
result.GetType().Name, result);
}
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
number.GetType().Name, number);
}
}
// The example displays the following output:
// The Int64 value -9223372036854775808 is outside the range of the SByte type.
// Converted the Int64 value -1 to the SByte value -1.
// Converted the Int64 value 0 to the SByte value 0.
// Converted the Int64 value 121 to the SByte value 121.
// The Int64 value 340 is outside the range of the SByte type.
// The Int64 value 9223372036854775807 is outside the range of the SByte type.
let numbers =
[| Int64.MinValue; -1L; 0L; 121L; 340L; Int64.MaxValue |]
for number in numbers do
try
let result = Convert.ToSByte number
printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn $"The {number.GetType().Name} value {number} is outside the range of the SByte type."
// The example displays the following output:
// The Int64 value -9223372036854775808 is outside the range of the SByte type.
// Converted the Int64 value -1 to the SByte value -1.
// Converted the Int64 value 0 to the SByte value 0.
// Converted the Int64 value 121 to the SByte value 121.
// Converted the Int64 value 340 to the SByte value 340.
// The Int64 value 9223372036854775807 is outside the range of the SByte type.
Dim numbers() As Long = { Int64.MinValue, -1, 0, 121, 340, Int64.MaxValue }
Dim result As SByte
For Each number As Long In numbers
Try
result = Convert.ToSByte(number)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
number.GetType().Name, number, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.", _
number.GetType().Name, number)
End Try
Next
' The example displays the following output:
' The Int64 value -9223372036854775808 is outside the range of the SByte type.
' Converted the Int64 value -1 to the SByte value -1.
' Converted the Int64 value 0 to the SByte value 0.
' Converted the Int64 value 121 to the SByte value 121.
' The Int64 value 340 is outside the range of the SByte type.
' The Int64 value 9223372036854775807 is outside the range of the SByte type.
Applies to
ToSByte(Byte)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the value of the specified 8-bit unsigned integer to the equivalent 8-bit signed integer.
public:
static System::SByte ToSByte(System::Byte value);[System.CLSCompliant(false)]
public static sbyte ToSByte (byte value);[<System.CLSCompliant(false)>]
static member ToSByte : byte -> sbytePublic Shared Function ToSByte (value As Byte) As SByteParameters
- value
- Byte
The 8-bit unsigned integer to convert.
Returns
An 8-bit signed integer that is equivalent to value.
- Attributes
Exceptions
value is greater than SByte.MaxValue.
Examples
The following example attempts to convert each element in a byte array to a signed byte.
byte[] numbers = { Byte.MinValue, 10, 100, Byte.MaxValue };
sbyte result;
foreach (byte number in numbers)
{
try {
result = Convert.ToSByte(number);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
number.GetType().Name, number,
result.GetType().Name, result);
}
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
number.GetType().Name, number);
}
}
// The example displays the following output:
// Converted the Byte value 0 to the SByte value 0.
// Converted the Byte value 10 to the SByte value 10.
// Converted the Byte value 100 to the SByte value 100.
// The Byte value 255 is outside the range of the SByte type.
let bytes =
[| Byte.MinValue; 14uy; 122uy; Byte.MaxValue |]
for byteValue in bytes do
let result = Convert.ToSByte byteValue
printfn $"Converted the {byteValue.GetType().Name} value {byteValue} to the {result.GetType().Name} value {result}."
// The example displays the following output:
// Converted the Byte value 0 to the SByte value 0.
// Converted the Byte value 14 to the SByte value 14.
// Converted the Byte value 122 to the SByte value 122.
// Converted the Byte value 255 to the SByte value 255.
Dim numbers() As Byte = { Byte.MinValue, 10, 100, Byte.MaxValue }
Dim result As SByte
For Each number As Byte In numbers
Try
result = Convert.ToSByte(number)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
number.GetType().Name, number, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.", _
number.GetType().Name, number)
End Try
Next
' The example displays the following output:
' Converted the Byte value 0 to the SByte value 0.
' Converted the Byte value 10 to the SByte value 10.
' Converted the Byte value 100 to the SByte value 100.
' The Byte value 255 is outside the range of the SByte type.
Applies to
ToSByte(Char)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the value of the specified Unicode character to the equivalent 8-bit signed integer.
public:
static System::SByte ToSByte(char value);[System.CLSCompliant(false)]
public static sbyte ToSByte (char value);[<System.CLSCompliant(false)>]
static member ToSByte : char -> sbytePublic Shared Function ToSByte (value As Char) As SByteParameters
- value
- Char
The Unicode character to convert.
Returns
An 8-bit signed integer that is equivalent to value.
- Attributes
Exceptions
value is greater than SByte.MaxValue.
Examples
The following example attempts to convert each element in an array of Char values to a signed byte.
char[] chars = { 'a', 'z', '\u0007', '\u0200', '\u1023' };
foreach (char ch in chars)
{
try {
sbyte result = Convert.ToSByte(ch);
Console.WriteLine("{0} is converted to {1}.", ch, result);
}
catch (OverflowException) {
Console.WriteLine("Unable to convert u+{0} to a byte.",
Convert.ToInt16(ch).ToString("X4"));
}
}
// The example displays the following output:
// a is converted to 97.
// z is converted to 122.
// is converted to 7.
// Unable to convert u+00C8 to a byte.
// Unable to convert u+03FF to a byte.
let chars =
[| 'a'; 'z'; '\u0007'; '\u03FF'; '\u7FFF'; '\uFFFE' |]
for ch in chars do
try
let result = Convert.ToSByte ch
printfn $"Converted the {ch.GetType().Name} value '{ch}' to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn $"Unable to convert u+{int ch:X4} to an Int32."
// The example displays the following output:
// Converted the Char value 'a' to the SByte value 97.
// Converted the Char value 'z' to the SByte value 122.
// Converted the Char value '' to the SByte value 7.
// Converted the Char value 'Ͽ' to the SByte value 1023.
// Converted the Char value '翿' to the SByte value 32767.
// Converted the Char value '' to the SByte value 65534.
Dim chars() As Char = { "a"c, "z"c, ChrW(7), ChrW(200), ChrW(1023) }
For Each ch As Char in chars
Try
Dim result As SByte = Convert.ToSByte(ch)
Console.WriteLine("{0} is converted to {1}.", ch, result)
Catch e As OverflowException
Console.WriteLine("Unable to convert u+{0} to a byte.", _
AscW(ch).ToString("X4"))
End Try
Next
' The example displays the following output:
' a is converted to 97.
' z is converted to 122.
' is converted to 7.
' Unable to convert u+00C8 to a byte.
' Unable to convert u+03FF to a byte.
Applies to
ToSByte(DateTime)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Calling this method always throws InvalidCastException.
public:
static System::SByte ToSByte(DateTime value);[System.CLSCompliant(false)]
public static sbyte ToSByte (DateTime value);[<System.CLSCompliant(false)>]
static member ToSByte : DateTime -> sbytePublic Shared Function ToSByte (value As DateTime) As SByteParameters
- value
- DateTime
The date and time value to convert.
Returns
This conversion is not supported. No value is returned.
- Attributes
Exceptions
This conversion is not supported.
Applies to
ToSByte(Boolean)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the specified Boolean value to the equivalent 8-bit signed integer.
public:
static System::SByte ToSByte(bool value);[System.CLSCompliant(false)]
public static sbyte ToSByte (bool value);[<System.CLSCompliant(false)>]
static member ToSByte : bool -> sbytePublic Shared Function ToSByte (value As Boolean) As SByteParameters
- value
- Boolean
The Boolean value to convert.
Returns
The number 1 if value is true; otherwise, 0.
- Attributes
Examples
The following example converts the Boolean values true and false to signed byte values.
bool falseFlag = false;
bool trueFlag = true;
Console.WriteLine("{0} converts to {1}.", falseFlag,
Convert.ToSByte(falseFlag));
Console.WriteLine("{0} converts to {1}.", trueFlag,
Convert.ToSByte(trueFlag));
// The example displays the following output:
// false converts to 0.
// true converts to 1.
let falseFlag = false
let trueFlag = true
printfn $"{falseFlag} converts to {Convert.ToSByte falseFlag}."
printfn $"{trueFlag} converts to {Convert.ToSByte trueFlag}."
// The example displays the following output:
// False converts to 0.
// True converts to 1.
Dim falseFlag As Boolean = False
Dim trueFlag As Boolean = True
Console.WriteLine("{0} converts to {1}.", falseFlag, _
Convert.ToSByte(falseFlag))
Console.WriteLine("{0} converts to {1}.", trueFlag, _
Convert.ToSByte(trueFlag))
' The example displays the following output:
' False converts to 0.
' True converts to 1.
Applies to
ToSByte(Double)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the value of the specified double-precision floating-point number to an equivalent 8-bit signed integer.
public:
static System::SByte ToSByte(double value);[System.CLSCompliant(false)]
public static sbyte ToSByte (double value);[<System.CLSCompliant(false)>]
static member ToSByte : double -> sbytePublic Shared Function ToSByte (value As Double) As SByteParameters
- value
- Double
The double-precision floating-point number to convert.
Returns
value, rounded to the nearest 8-bit signed integer. If value is halfway between two whole numbers, the even number is returned; that is, 4.5 is converted to 4, and 5.5 is converted to 6.
- Attributes
Exceptions
value is greater than SByte.MaxValue or less than SByte.MinValue.
Examples
The following example attempts to convert each element in an array of Double values to a signed byte.
double[] numbers = { Double.MinValue, -129.5, -12.7, 0, 16,
103.6, 255.0, 1.63509e17, Double.MaxValue};
sbyte result;
foreach (double number in numbers)
{
try {
result = Convert.ToSByte(number);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
number.GetType().Name, number,
result.GetType().Name, result);
}
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
number.GetType().Name, number);
}
}
// The example displays the following output:
// The Double value -1.79769313486232E+308 is outside the range of the SByte type.
// The Double value -129.5 is outside the range of the SByte type.
// Converted the Double value -12.7 to the SByte value -13.
// Converted the Double value 0 to the SByte value 0.
// Converted the Double value 16 to the SByte value 16.
// Converted the Double value 103.6 to the SByte value 104.
// The Double value 255 is outside the range of the SByte type.
// The Double value 1.63509E+17 is outside the range of the SByte type.
// The Double value 1.79769313486232E+308 is outside the range of the SByte type.
let values =
[| Double.MinValue; -1.38e10; -1023.299; -12.98
0; 9.113e-16; 103.919; 17834.191; Double.MaxValue |]
for value in values do
try
let result = Convert.ToSByte value
printfn $"Converted the {value.GetType().Name} value '{value}' to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn $"{value} is outside the range of the SByte type."
// -1.79769313486232E+308 is outside the range of the SByte type.
// -13800000000 is outside the range of the SByte type.
// Converted the Double value '-1023.299' to the SByte value -1023.
// Converted the Double value '-12.98' to the SByte value -13.
// Converted the Double value '0' to the SByte value 0.
// Converted the Double value '9.113E-16' to the SByte value 0.
// Converted the Double value '103.919' to the SByte value 104.
// Converted the Double value '17834.191' to the SByte value 17834.
// 1.79769313486232E+308 is outside the range of the SByte type.
Dim numbers() As Double = { Double.MinValue, -129.5, -12.7, 0, 16, _
103.6, 255.0, 1.63509e17, Double.MaxValue}
Dim result As SByte
For Each number As Double In numbers
Try
result = Convert.ToSByte(number)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
number.GetType().Name, number, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.", _
number.GetType().Name, number)
End Try
Next
' The example displays the following output:
' The Double value -1.79769313486232E+308 is outside the range of the SByte type.
' The Double value -129.5 is outside the range of the SByte type.
' Converted the Double value -12.7 to the SByte value -13.
' Converted the Double value 0 to the SByte value 0.
' Converted the Double value 16 to the SByte value 16.
' Converted the Double value 103.6 to the SByte value 104.
' The Double value 255 is outside the range of the SByte type.
' The Double value 1.63509E+17 is outside the range of the SByte type.
' The Double value 1.79769313486232E+308 is outside the range of the SByte type.
See also
Applies to
ToSByte(Int16)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the value of the specified 16-bit signed integer to the equivalent 8-bit signed integer.
public:
static System::SByte ToSByte(short value);[System.CLSCompliant(false)]
public static sbyte ToSByte (short value);[<System.CLSCompliant(false)>]
static member ToSByte : int16 -> sbytePublic Shared Function ToSByte (value As Short) As SByteParameters
- value
- Int16
The 16-bit signed integer to convert.
Returns
An 8-bit signed integer that is equivalent to value.
- Attributes
Exceptions
value is greater than SByte.MaxValue or less than SByte.MinValue.
Examples
The following example attempts to convert each element in an array of signed 16-bit integers to a signed byte.
short[] numbers = { Int16.MinValue, -1, 0, 121, 340, Int16.MaxValue };
sbyte result;
foreach (short number in numbers)
{
try {
result = Convert.ToSByte(number);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
number.GetType().Name, number,
result.GetType().Name, result);
}
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
number.GetType().Name, number);
}
}
// The example displays the following output:
// The Int16 value -32768 is outside the range of the SByte type.
// Converted the Int16 value -1 to the SByte value -1.
// Converted the Int16 value 0 to the SByte value 0.
// Converted the Int16 value 121 to the SByte value 121.
// The Int16 value 340 is outside the range of the SByte type.
// The Int16 value 32767 is outside the range of the SByte type.
let numbers =
[| Int16.MinValue; -1s; 0s; 121s; 340s; Int16.MaxValue |]
for number in numbers do
let result = Convert.ToSByte number
printfn $"Converted the {number.GetType().Name} value {number} to a {result.GetType().Name} value {result}."
// The example displays the following output:
// Converted the Int16 value -32768 to a Int64 value -32768.
// Converted the Int16 value -1 to a Int64 value -1.
// Converted the Int16 value 0 to a Int64 value 0.
// Converted the Int16 value 121 to a Int64 value 121.
// Converted the Int16 value 340 to a Int64 value 340.
// Converted the Int16 value 32767 to a Int64 value 32767.
Dim numbers() As Short = { Int16.MinValue, -1, 0, 121, 340, Int16.MaxValue }
Dim result As SByte
For Each number As Short In numbers
Try
result = Convert.ToSByte(number)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
number.GetType().Name, number, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.", _
number.GetType().Name, number)
End Try
Next
' The example displays the following output:
' The Int16 value -32768 is outside the range of the SByte type.
' Converted the Int16 value -1 to the SByte value -1.
' Converted the Int16 value 0 to the SByte value 0.
' Converted the Int16 value 121 to the SByte value 121.
' The Int16 value 340 is outside the range of the SByte type.
' The Int16 value 32767 is outside the range of the SByte type.
Applies to
ToSByte(Decimal)
- Source:
- Convert.cs
- Source:
- Convert.cs
- Source:
- Convert.cs
Important
This API is not CLS-compliant.
Converts the value of the specified decimal number to an equivalent 8-bit signed integer.
public:
static System::SByte ToSByte(System::Decimal value);[System.CLSCompliant(false)]
public static sbyte ToSByte (decimal value);[<System.CLSCompliant(false)>]
static member ToSByte : decimal -> sbytePublic Shared Function ToSByte (value As Decimal) As SByteParameters
- value
- Decimal
The decimal number to convert.
Returns
value, rounded to the nearest 8-bit signed integer. If value is halfway between two whole numbers, the even number is returned; that is, 4.5 is converted to 4, and 5.5 is converted to 6.
- Attributes
Exceptions
value is greater than SByte.MaxValue or less than SByte.MinValue.
Examples
The following example attempts to convert each element in an array of Decimal values to a signed byte.
decimal[] numbers = { Decimal.MinValue, -129.5m, -12.7m, 0m, 16m,
103.6m, 255.0m, Decimal.MaxValue };
sbyte result;
foreach (decimal number in numbers)
{
try {
result = Convert.ToSByte(number);
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
number.GetType().Name, number,
result.GetType().Name, result);
}
catch (OverflowException) {
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
number.GetType().Name, number);
}
}
// The example displays the following output:
// The Decimal value -79228162514264337593543950335 is outside the range of the SByte type.
// The Decimal value -129.5 is outside the range of the SByte type.
// Converted the Decimal value -12.7 to the SByte value -13.
// Converted the Decimal value 0 to the SByte value 0.
// Converted the Decimal value 16 to the SByte value 16.
// Converted the Decimal value 103.6 to the SByte value 104.
// The Decimal value 255 is outside the range of the SByte type.
// The Decimal value 79228162514264337593543950335 is outside the range of the SByte type.
let values =
[| Decimal.MinValue; -1034.23m; -12m; 0m; 147m
199.55m; 9214.16m; Decimal.MaxValue |]
for value in values do
try
let result = Convert.ToSByte value
printfn $"Converted the {value.GetType().Name} value '{value}' to the {result.GetType().Name} value {result}."
with :? OverflowException ->
printfn $"{value} is outside the range of the SByte type."
// The example displays the following output:
// -79228162514264337593543950335 is outside the range of the SByte type.
// Converted the Decimal value '-1034.23' to the SByte value -1034.
// Converted the Decimal value '-12' to the SByte value -12.
// Converted the Decimal value '0' to the SByte value 0.
// Converted the Decimal value '147' to the SByte value 147.
// Converted the Decimal value '199.55' to the SByte value 200.
// Converted the Decimal value '9214.16' to the SByte value 9214.
// 79228162514264337593543950335 is outside the range of the SByte type.
Dim numbers() As Decimal = { Decimal.MinValue, -129.5d, -12.7d, 0d, 16d, _
103.6d, 255.0d, Decimal.MaxValue }
Dim result As SByte
For Each number As Decimal In numbers
Try
result = Convert.ToSByte(number)
Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
number.GetType().Name, number, _
result.GetType().Name, result)
Catch e As OverflowException
Console.WriteLine("The {0} value {1} is outside the range of the SByte type.", _
number.GetType().Name, number)
End Try
Next
' The example displays the following output:
' The Decimal value -79228162514264337593543950335 is outside the range of the SByte type.
' The Decimal value -129.5 is outside the range of the SByte type.
' Converted the Decimal value -12.7 to the SByte value -13.
' Converted the Decimal value 0 to the SByte value 0.
' Converted the Decimal value 16 to the SByte value 16.
' Converted the Decimal value 103.6 to the SByte value 104.
' The Decimal value 255 is outside the range of the SByte type.
' The Decimal value 79228162514264337593543950335 is outside the range of the SByte type.
See also
Applies to
Samarbeta med oss på GitHub
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