Byte.Parse メソッド
数値の文字列形式を、それと等価の Byte に変換します。
オーバーロードの一覧
数値の文字列形式を、それと等価の Byte に変換します。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function Parse(String) As Byte
指定したカルチャ固有の書式の数値の文字列形式を、それと等価の Byte に変換します。
[Visual Basic] Overloads Public Shared Function Parse(String, IFormatProvider) As Byte
[C++] public: static unsigned char Parse(String*, IFormatProvider*);
[JScript] public static function Parse(String, IFormatProvider) : Byte;
指定したスタイルの数値の文字列形式を、それと等価の Byte に変換します。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function Parse(String, NumberStyles) As Byte
[C++] public: static unsigned char Parse(String*, NumberStyles);
[JScript] public static function Parse(String, NumberStyles) : Byte;
指定したスタイルおよびカルチャ固有の書式の数値の文字列形式を、それと等価の Byte に変換します。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function Parse(String, NumberStyles, IFormatProvider) As Byte
[C#] public static byte Parse(string, NumberStyles, IFormatProvider);
[C++] public: static unsigned char Parse(String*, NumberStyles, IFormatProvider*);
[JScript] public static function Parse(String, NumberStyles, IFormatProvider) : Byte;
使用例
[Visual Basic, C#, C++] Parse メソッドの複数のオーバーロードを使用して Byte 値の文字列形式を解析する例を次に示します。
[Visual Basic, C#, C++] メモ ここでは、Parse のオーバーロード形式のうちの 1 つだけについて、使用例を示します。その他の例については、各オーバーロード形式のトピックを参照してください。
' Example of the Byte.Parse( ) methods.
Imports System
Imports System.Globalization
Imports Microsoft.VisualBasic
Module ByteParseDemo
Sub ByteParse( styles As NumberStyles, _
provider As IFormatProvider )
Dim byteFormats As String( ) = { _
" 99 ", " +246 ", " plus246 ", " 1_2_3", " DE " }
' Parse each string in the byteFormat array, using
' NumberStyles and IFormatProvider, if specified.
Dim byteString As String
For Each byteString In byteFormats
Dim byteNumber As Byte
' Display the first part of the output line.
Console.Write( " Parse of {0,-15}", _
String.Format( """{0}""", byteString ) )
' Use the appropriate Byte.Parse overload, based on
' the parameters that are specified.
Try
If provider Is Nothing Then
If styles < 0 Then
byteNumber = Byte.Parse( byteString )
Else
byteNumber = _
Byte.Parse( byteString, styles )
End If
ElseIf styles < 0 Then
byteNumber = _
Byte.Parse( byteString, provider )
Else
byteNumber = _
Byte.Parse( byteString, styles, provider )
End If
' Display the resulting value if Parse succeeded.
Console.WriteLine( "succeeded: {0}", _
byteNumber )
' Display the exception message if Parse failed.
Catch ex As Exception
Console.WriteLine( "failed: {0}", ex.Message )
End Try
Next byteString
End Sub
Sub RunParseDemo( )
' Do not use IFormatProvider or NumberStyles.
Console.WriteLine( vbCrLf & _
"NumberStyles and IFormatProvider are not used:" )
ByteParse( CType( -1, NumberStyles ), Nothing )
' Use NumberStyles.HexNumber; do not use IFormatProvider.
Console.WriteLine( vbCrLf & "NumberStyles." & _
"HexNumber is used; IFormatProvider is not used:" )
ByteParse( NumberStyles.HexNumber, Nothing )
' Get the NumberFormatInfo object from the invariant
' culture, and set the positive-sign string to "plus".
Dim culture As New CultureInfo( "" )
Dim numFormat As NumberFormatInfo = culture.NumberFormat
numFormat.PositiveSign = "plus"
' Use the NumberFormatInfo object as the IFormatProvider.
' Do not use a NumberStyles value.
Console.WriteLine( vbCrLf & "A NumberStyles value " & _
"is not used, but the positive sign is ""plus"":" )
ByteParse( CType( -1, NumberStyles ), numFormat )
' Change the digit group separator to '_' and the
' digit group size to 1.
numFormat.NumberGroupSeparator = "_"
numFormat.NumberGroupSizes = New Integer( ) { 1 }
' Use NumberStyles.Number and the same IFormatProvider.
Console.WriteLine( vbCrLf & "NumberStyles.Number is " & _
"used, group separator = ""_"", size = 1:" )
ByteParse( NumberStyles.Number, numFormat )
End Sub
Sub Main( )
Console.WriteLine( "This example of" & vbCrLf & _
" Byte.Parse( string )," & vbCrLf & _
" Byte.Parse( string, NumberStyles )," & vbCrLf & _
" Byte.Parse( string, IFormatProvider ), and " & _
vbCrLf & " Byte.Parse( string, NumberStyles, " & _
"IFormatProvider )" & vbCrLf & "generates the " & _
"following output when parsing string representations" & _
vbCrLf & "of Byte values with each of these " & _
"forms of Byte.Parse( )." )
RunParseDemo( )
End Sub
End Module
' This example of
' Byte.Parse( string ),
' Byte.Parse( string, NumberStyles ),
' Byte.Parse( string, IFormatProvider ), and
' Byte.Parse( string, NumberStyles, IFormatProvider )
' generates the following output when parsing string representations
' of Byte values with each of these forms of Byte.Parse( ).
'
' NumberStyles and IFormatProvider are not used:
' Parse of " 99 " succeeded: 99
' Parse of " +246 " succeeded: 246
' Parse of " plus246 " failed: Input string was not in a correct format.
' Parse of " 1_2_3" failed: Input string was not in a correct format.
' Parse of " DE " failed: Input string was not in a correct format.
'
' NumberStyles.HexNumber is used; IFormatProvider is not used:
' Parse of " 99 " succeeded: 153
' Parse of " +246 " failed: Input string was not in a correct format.
' Parse of " plus246 " failed: Input string was not in a correct format.
' Parse of " 1_2_3" failed: Input string was not in a correct format.
' Parse of " DE " succeeded: 222
'
' A NumberStyles value is not used, but the positive sign is "plus":
' Parse of " 99 " succeeded: 99
' Parse of " +246 " failed: Input string was not in a correct format.
' Parse of " plus246 " succeeded: 246
' Parse of " 1_2_3" failed: Input string was not in a correct format.
' Parse of " DE " failed: Input string was not in a correct format.
'
' NumberStyles.Number is used, group separator = "_", size = 1:
' Parse of " 99 " succeeded: 99
' Parse of " +246 " failed: Input string was not in a correct format.
' Parse of " plus246 " succeeded: 246
' Parse of " 1_2_3" succeeded: 123
' Parse of " DE " failed: Input string was not in a correct format.
[C#]
// Example of the Byte.Parse( ) methods.
using System;
using System.Globalization;
class ByteParseDemo
{
static void ByteParse( NumberStyles styles,
IFormatProvider provider )
{
string[ ] byteFormats = {
" 99 ", " +246 ", " plus246 ", " 1_2_3", " DE " };
// Parse each string in the byteFormat array, using
// NumberStyles and IFormatProvider, if specified.
foreach ( string byteString in byteFormats )
{
byte byteNumber;
// Display the first part of the output line.
Console.Write( " Parse of {0,-15}",
String.Format( "\"{0}\"", byteString ) );
// Use the appropriate Byte.Parse overload, based
// on the parameters that are specified.
try
{
if( provider == null )
if( styles < 0 )
byteNumber = Byte.Parse( byteString );
else
byteNumber =
Byte.Parse( byteString, styles );
else if( styles < 0 )
byteNumber =
Byte.Parse( byteString, provider );
else
byteNumber =
Byte.Parse( byteString, styles, provider );
// Display the resulting value if Parse succeeded.
Console.WriteLine( "succeeded: {0}", byteNumber );
}
catch( Exception ex )
{
// Display the exception message if Parse failed.
Console.WriteLine( "failed: {0}", ex.Message );
}
}
}
static void RunParseDemo( )
{
// Do not use IFormatProvider or NumberStyles.
Console.WriteLine(
"\nNumberStyles and IFormatProvider are not used:" );
ByteParse( (NumberStyles)(-1), null );
// Use NumberStyles.HexNumber; do not use IFormatProvider.
Console.WriteLine( "\nNumberStyles.HexNumber, " +
"is used; IFormatProvider is not used:" );
ByteParse( NumberStyles.HexNumber, null );
// Get the NumberFormatInfo object from the invariant
// culture, and set the positive-sign string to "plus".
CultureInfo culture = new CultureInfo( "" );
NumberFormatInfo numFormat = culture.NumberFormat;
numFormat.PositiveSign = "plus";
// Use the NumberFormatInfo object as the IFormatProvider.
// Do not use a NumberStyles value.
Console.WriteLine( "\nA NumberStyles value is not used, " +
"but the positive sign is \"plus\":" );
ByteParse( (NumberStyles)(-1), numFormat );
// Change the digit group separator to '_' and the
// digit group size to 1.
numFormat.NumberGroupSeparator = "_";
numFormat.NumberGroupSizes = new int[ ] { 1 };
// Use NumberStyles.Number and the same IFormatProvider.
Console.WriteLine( "\nNumberStyles.Number is " +
"used, group separator = \"_\", size = 1:" );
ByteParse( NumberStyles.Number, numFormat );
}
static void Main( )
{
Console.WriteLine( "This example of\n" +
" Byte.Parse( string ),\n" +
" Byte.Parse( string, NumberStyles ),\n" +
" Byte.Parse( string, IFormatProvider ), and \n" +
" Byte.Parse( string, NumberStyles, IFormatProvider" +
" )\ngenerates the following output when parsing " +
"string representations\nof Byte values with each " +
"of these forms of Byte.Parse( )." );
RunParseDemo( );
}
}
/*
This example of
Byte.Parse( string ),
Byte.Parse( string, NumberStyles ),
Byte.Parse( string, IFormatProvider ), and
Byte.Parse( string, NumberStyles, IFormatProvider )
generates the following output when parsing string representations
of Byte values with each of these forms of Byte.Parse( ).
NumberStyles and IFormatProvider are not used:
Parse of " 99 " succeeded: 99
Parse of " +246 " succeeded: 246
Parse of " plus246 " failed: Input string was not in a correct format.
Parse of " 1_2_3" failed: Input string was not in a correct format.
Parse of " DE " failed: Input string was not in a correct format.
NumberStyles.HexNumber, is used; IFormatProvider is not used:
Parse of " 99 " succeeded: 153
Parse of " +246 " failed: Input string was not in a correct format.
Parse of " plus246 " failed: Input string was not in a correct format.
Parse of " 1_2_3" failed: Input string was not in a correct format.
Parse of " DE " succeeded: 222
A NumberStyles value is not used, but the positive sign is "plus":
Parse of " 99 " succeeded: 99
Parse of " +246 " failed: Input string was not in a correct format.
Parse of " plus246 " succeeded: 246
Parse of " 1_2_3" failed: Input string was not in a correct format.
Parse of " DE " failed: Input string was not in a correct format.
NumberStyles.Number is used, group separator = "_", size = 1:
Parse of " 99 " succeeded: 99
Parse of " +246 " failed: Input string was not in a correct format.
Parse of " plus246 " succeeded: 246
Parse of " 1_2_3" succeeded: 123
Parse of " DE " failed: Input string was not in a correct format.
*/
[C++]
// Example of the Byte::Parse( ) methods.
#using <mscorlib.dll>
using namespace System;
using namespace System::Globalization;
using namespace System::Collections;
void ByteParse( NumberStyles styles, IFormatProvider* provider )
{
String* byteFormats [ ] = __gc new String*[ 5 ];
byteFormats[ 0 ] = S" 99 ";
byteFormats[ 1 ] = S" +246 ";
byteFormats[ 2 ] = S" plus246 ";
byteFormats[ 3 ] = S" 1_2_3";
byteFormats[ 4 ] = S" DE ";
// Parse each string in the byteFormat array, using
// NumberStyles and IFormatProvider, if specified.
// This implements foreach( String* byteString in byteFormats ).
IEnumerator* myEnum = byteFormats->GetEnumerator( );
while( myEnum->MoveNext( ) )
{
String* byteString = __try_cast<String*>( myEnum->Current );
Byte byteNumber;
// Display the first part of the output line.
Console::Write( S" Parse of {0,-15}",
String::Format( S"\"{0}\"", byteString ) );
try
{
// Use the appropriate Byte::Parse overload, based
// on the parameters that are specified.
if( provider == (IFormatProvider*)0 )
if( styles < 0 )
byteNumber = Byte::Parse( byteString );
else
byteNumber = Byte::Parse( byteString, styles );
else if( styles < 0 )
byteNumber = Byte::Parse( byteString, provider );
else
byteNumber =
Byte::Parse( byteString, styles, provider );
// Display the resulting value if Parse succeeded.
Console::WriteLine( S"succeeded: {0}",
__box( byteNumber ) );
}
catch( Exception* ex )
{
// Display the exception message if Parse failed.
Console::WriteLine( S"failed: {0}", ex->Message );
}
}
}
void RunParseDemo( )
{
IFormatProvider* null = 0;
// Do not use IFormatProvider or NumberStyles.
Console::WriteLine(
S"\nNumberStyles and IFormatProvider are not used:" );
ByteParse( (NumberStyles)(-1), null );
// Use NumberStyles.HexNumber; do not use IFormatProvider.
Console::WriteLine( S"\nNumberStyles::HexNumber "
S"is used; IFormatProvider is not used:" );
ByteParse( NumberStyles::HexNumber, null );
// Get the NumberFormatInfo object from the invariant
// culture, and set the positive-sign string to "plus".
CultureInfo* culture = new CultureInfo( S"" );
NumberFormatInfo* numFormat = culture->NumberFormat;
numFormat->PositiveSign = S"plus";
// Use the NumberFormatInfo object as the IFormatProvider.
// Do not use a NumberStyles value.
Console::WriteLine( S"\nA NumberStyles value is not used, "
S"but the positive sign is \"plus\":" );
ByteParse( (NumberStyles)(-1), numFormat );
// Change the digit group separator to '_' and the
// digit group size to 1.
numFormat->NumberGroupSeparator = S"_";
Int32 sizes __gc [ ] = { 1 };
numFormat->NumberGroupSizes = sizes;
// Use NumberStyles::Number and the same IFormatProvider.
Console::WriteLine( S"\nNumberStyles.Number is "
S"used, group separator = \"_\", size = 1:" );
ByteParse( NumberStyles::Number, numFormat );
}
void main( )
{
Console::WriteLine( S"This example of\n"
S" Byte::Parse( String* ),\n"
S" Byte::Parse( String*, NumberStyles ),\n"
S" Byte::Parse( String*, IFormatProvider* ), and \n"
S" Byte::Parse( String*, NumberStyles, IFormatProvider*"
S" )\ngenerates the following output when parsing "
S"string representations\nof Byte values with each "
S"of these forms of Byte::Parse( )." );
RunParseDemo( );
}
/*
This example of
Byte::Parse( String* ),
Byte::Parse( String*, NumberStyles ),
Byte::Parse( String*, IFormatProvider* ), and
Byte::Parse( String*, NumberStyles, IFormatProvider* )
generates the following output when parsing string representations
of Byte values with each of these forms of Byte::Parse( ).
NumberStyles and IFormatProvider are not used:
Parse of " 99 " succeeded: 99
Parse of " +246 " succeeded: 246
Parse of " plus246 " failed: Input string was not in a correct format.
Parse of " 1_2_3" failed: Input string was not in a correct format.
Parse of " DE " failed: Input string was not in a correct format.
NumberStyles::HexNumber is used; IFormatProvider is not used:
Parse of " 99 " succeeded: 153
Parse of " +246 " failed: Input string was not in a correct format.
Parse of " plus246 " failed: Input string was not in a correct format.
Parse of " 1_2_3" failed: Input string was not in a correct format.
Parse of " DE " succeeded: 222
A NumberStyles value is not used, but the positive sign is "plus":
Parse of " 99 " succeeded: 99
Parse of " +246 " failed: Input string was not in a correct format.
Parse of " plus246 " succeeded: 246
Parse of " 1_2_3" failed: Input string was not in a correct format.
Parse of " DE " failed: Input string was not in a correct format.
NumberStyles.Number is used, group separator = "_", size = 1:
Parse of " 99 " succeeded: 99
Parse of " +246 " failed: Input string was not in a correct format.
Parse of " plus246 " succeeded: 246
Parse of " 1_2_3" succeeded: 123
Parse of " DE " failed: Input string was not in a correct format.
*/
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