Decimal Explicit Conversion (Decimal to Int64)
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Converts a Decimal to a 64-bit signed integer.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Shared Narrowing Operator CType ( _
value As Decimal _
) As Long
public static explicit operator long (
decimal value
)
Parameters
- value
Type: System.Decimal
A Decimal to convert.
Return Value
Type: System.Int64
A 64-bit signed integer that represents the converted Decimal.
Exceptions
| Exception | Condition |
|---|---|
| OverflowException | value is less than Int64.MinValue or greater than Int64.MaxValue. |
Remarks
This operator supports the explicit conversion of a Decimal to a Int64. The syntax for such explicit conversions is language-dependent, and individual language compilers can provide different implementations and return different results. The example illustrates the different return values when you explicitly convert a Decimal value to an Int64 value by using C# and Visual Basic. To perform a conversion that is independent of language, you can call the ToInt64 or the Convert.ToInt64(Decimal) method.
Examples
The following code example converts Decimal numbers to Int64 values using the explicit Decimal to Int64 conversion.
' Example of the explicit conversions from Decimal to Long and
' Decimal to ULong.
Module Example
Const formatter As String = "{0,25}{1,22}{2,22}"
' Convert the decimal argument catch exceptions that are thrown.
Public Sub DecimalToU_Int64(ByVal outputBlock As System.Windows.Controls.TextBlock, ByVal argument As Decimal)
Dim Int64Value As Object
Dim UInt64Value As Object
' Convert the argument to a long value.
Try
Int64Value = CLng(argument)
Catch ex As Exception
Int64Value = ex.GetType().Name
End Try
' Convert the argument to a ulong value.
Try
UInt64Value = CULng(argument)
Catch ex As Exception
UInt64Value = ex.GetType().Name
End Try
outputBlock.Text += String.Format(formatter, argument, _
Int64Value, UInt64Value) + vbCrLf
End Sub
Public Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
outputBlock.Text += String.Format(formatter, "Decimal argument", _
"Long/Exception", "ULong/Exception") + vbCrLf
outputBlock.Text += String.Format(formatter, "----------------", _
"--------------", "---------------") + vbCrLf
' Convert decimal values and display the results.
DecimalToU_Int64(outputBlock, 123D)
DecimalToU_Int64(outputBlock, New Decimal(123000, 0, 0, False, 3))
DecimalToU_Int64(outputBlock, 123.999D)
DecimalToU_Int64(outputBlock, 18446744073709551615.999D)
DecimalToU_Int64(outputBlock, 18446744073709551616D)
DecimalToU_Int64(outputBlock, 9223372036854775807.999D)
DecimalToU_Int64(outputBlock, 9223372036854775808D)
DecimalToU_Int64(outputBlock, -0.999D)
DecimalToU_Int64(outputBlock, -1D)
DecimalToU_Int64(outputBlock, -9223372036854775808.999D)
DecimalToU_Int64(outputBlock, -9223372036854775809D)
End Sub
End Module
' The example displays the following output:
' Decimal argument Long/Exception ULong/Exception
' ---------------- -------------- ---------------
' 123 123 123
' 123.000 123 123
' 123.999 124 124
' 18446744073709551615.999 OverflowException OverflowException
' 18446744073709551616 OverflowException OverflowException
' 9223372036854775807.999 OverflowException 9223372036854775808
' 9223372036854775808 OverflowException 9223372036854775808
' -0.999 -1 OverflowException
' -1 -1 OverflowException
' -9223372036854775808.999 OverflowException OverflowException
' -9223372036854775809 OverflowException OverflowException
// Example of the explicit conversions from decimal to long and
// decimal to ulong.
using System;
class Example
{
const string formatter = "{0,25}{1,22}{2,22}";
// Get the exception type name; remove the namespace prefix.
public static string GetExceptionType(Exception ex)
{
string exceptionType = ex.GetType().ToString();
return exceptionType.Substring(
exceptionType.LastIndexOf('.') + 1);
}
// Convert the decimal argument; catch exceptions that are thrown.
public static void DecimalToU_Int64(System.Windows.Controls.TextBlock outputBlock, decimal argument)
{
object Int64Value;
object UInt64Value;
// Convert the argument to a long value.
try
{
Int64Value = (long)argument;
}
catch (Exception ex)
{
Int64Value = GetExceptionType(ex);
}
// Convert the argument to a ulong value.
try
{
UInt64Value = (ulong)argument;
}
catch (Exception ex)
{
UInt64Value = GetExceptionType(ex);
}
outputBlock.Text += String.Format(formatter, argument,
Int64Value, UInt64Value) + "\n";
}
public static void Demo(System.Windows.Controls.TextBlock outputBlock)
{
outputBlock.Text += String.Format(
"This example of the explicit conversions from decimal " +
"to long \nand decimal to ulong generates the following " +
"output. It displays \nseveral converted decimal " +
"values.\n") + "\n";
outputBlock.Text += String.Format(formatter, "decimal argument",
"long/exception", "ulong/exception") + "\n";
outputBlock.Text += String.Format(formatter, "----------------",
"--------------", "---------------") + "\n";
// Convert decimal values and display the results.
DecimalToU_Int64(outputBlock, 123M);
DecimalToU_Int64(outputBlock, new decimal(123000, 0, 0, false, 3));
DecimalToU_Int64(outputBlock, 123.999M);
DecimalToU_Int64(outputBlock, 18446744073709551615.999M);
DecimalToU_Int64(outputBlock, 18446744073709551616M);
DecimalToU_Int64(outputBlock, 9223372036854775807.999M);
DecimalToU_Int64(outputBlock, 9223372036854775808M);
DecimalToU_Int64(outputBlock, -0.999M);
DecimalToU_Int64(outputBlock, -1M);
DecimalToU_Int64(outputBlock, -9223372036854775808.999M);
DecimalToU_Int64(outputBlock, -9223372036854775809M);
}
}
/*
This example of the explicit conversions from decimal to long
and decimal to ulong generates the following output. It displays
several converted decimal values.
decimal argument long/exception ulong/exception
---------------- -------------- ---------------
123 123 123
123.000 123 123
123.999 123 123
18446744073709551615.999 OverflowException 18446744073709551615
18446744073709551616 OverflowException OverflowException
9223372036854775807.999 9223372036854775807 9223372036854775807
9223372036854775808 OverflowException 9223372036854775808
-0.999 0 0
-1 -1 OverflowException
-9223372036854775808.999 -9223372036854775808 OverflowException
-9223372036854775809 OverflowException OverflowException
*/
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
XNA Framework
Supported in: Xbox 360, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.