Buffer.SetByte(Array, Int32, Byte) Methode
Definition
Wichtig
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Weist einem Byte an einer bestimmten Position eines angegebenen Arrays einen bestimmten Wert zu.
public:
static void SetByte(Array ^ array, int index, System::Byte value);public static void SetByte (Array array, int index, byte value);static member SetByte : Array * int * byte -> unitPublic Shared Sub SetByte (array As Array, index As Integer, value As Byte)Parameter
- array
- Array
Ein -Array.
- index
- Int32
Eine Position im Array.
- value
- Byte
Ein zuzuweisender Wert.
Ausnahmen
array ist kein Array von Primitiven.
array ist null.
index ist negativ oder größer als die Länge von array.
array ist größer als 2 Gigabyte (GB).
Beispiele
Im folgenden Codebeispiel werden mithilfe der SetByte Methode Werte an bestimmten Speicherorten innerhalb von Arrays zu Bytes zugewiesen.
// Example of the Buffer::SetByte method.
using namespace System;
// Display the array contents in hexadecimal.
void DisplayArray( Array^ arr, String^ name )
{
// Get the array element width; format the formatting string.
int elemWidth = Buffer::ByteLength( arr ) / arr->Length;
String^ format = String::Format( " {{0:X{0}}}", 2 * elemWidth );
// Display the array elements from right to left.
Console::Write( "{0,7}:", name );
for ( int loopX = arr->Length - 1; loopX >= 0; loopX-- )
Console::Write( format, arr->GetValue( loopX ) );
Console::WriteLine();
}
int main()
{
// These are the arrays to be modified with SetByte.
array<Int16>^shorts = gcnew array<Int16>(10);
array<Int64>^longs = gcnew array<Int64>(3);
Console::WriteLine( "This example of the "
"Buffer::SetByte( Array*, int, unsigned char ) \n"
"method generates the following output.\n"
"Note: The arrays are displayed from right to left.\n" );
Console::WriteLine( " Initial values of arrays:\n" );
// Display the initial values of the arrays.
DisplayArray( shorts, "shorts" );
DisplayArray( longs, "longs" );
// Copy two regions of source array to destination array,
// and two overlapped copies from source to source.
Console::WriteLine( "\n Array values after setting byte 3 = 25, \n"
" byte 6 = 64, byte 12 = 121, and byte 17 = 196:\n" );
Buffer::SetByte( shorts, 3, 25 );
Buffer::SetByte( shorts, 6, 64 );
Buffer::SetByte( shorts, 12, 121 );
Buffer::SetByte( shorts, 17, 196 );
Buffer::SetByte( longs, 3, 25 );
Buffer::SetByte( longs, 6, 64 );
Buffer::SetByte( longs, 12, 121 );
Buffer::SetByte( longs, 17, 196 );
// Display the arrays again.
DisplayArray( shorts, "shorts" );
DisplayArray( longs, "longs" );
}
/*
This example of the Buffer::SetByte( Array*, int, unsigned char )
method generates the following output.
Note: The arrays are displayed from right to left.
Initial values of arrays:
shorts: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
longs: 0000000000000000 0000000000000000 0000000000000000
Array values after setting byte 3 = 25,
byte 6 = 64, byte 12 = 121, and byte 17 = 196:
shorts: 0000 C400 0000 0079 0000 0000 0040 0000 1900 0000
longs: 000000000000C400 0000007900000000 0040000019000000
*/
// Example of the Buffer.SetByte method.
using System;
class SetByteDemo
{
// Display the array contents in hexadecimal.
public static void DisplayArray( Array arr, string name )
{
// Get the array element width; format the formatting string.
int elemWidth = Buffer.ByteLength( arr ) / arr.Length;
string format = String.Format( " {{0:X{0}}}", 2 * elemWidth );
// Display the array elements from right to left.
Console.Write( "{0,7}:", name );
for( int loopX = arr.Length - 1; loopX >= 0; loopX-- )
Console.Write( format, arr.GetValue( loopX ) );
Console.WriteLine( );
}
public static void Main( )
{
// These are the arrays to be modified with SetByte.
short[ ] shorts = new short[ 10 ];
long[ ] longs = new long[ 3 ];
Console.WriteLine( "This example of the " +
"Buffer.SetByte( Array, int, byte ) \n" +
"method generates the following output.\n" +
"Note: The arrays are displayed from right to left.\n" );
Console.WriteLine( " Initial values of arrays:\n" );
// Display the initial values of the arrays.
DisplayArray( shorts, "shorts" );
DisplayArray( longs, "longs" );
// Copy two regions of source array to destination array,
// and two overlapped copies from source to source.
Console.WriteLine( "\n" +
" Array values after setting byte 3 = 25, \n" +
" byte 6 = 64, byte 12 = 121, and byte 17 = 196:\n" );
Buffer.SetByte( shorts, 3, 25 );
Buffer.SetByte( shorts, 6, 64 );
Buffer.SetByte( shorts, 12, 121 );
Buffer.SetByte( shorts, 17, 196 );
Buffer.SetByte( longs, 3, 25 );
Buffer.SetByte( longs, 6, 64 );
Buffer.SetByte( longs, 12, 121 );
Buffer.SetByte( longs, 17, 196 );
// Display the arrays again.
DisplayArray( shorts, "shorts" );
DisplayArray( longs, "longs" );
}
}
/*
This example of the Buffer.SetByte( Array, int, byte )
method generates the following output.
Note: The arrays are displayed from right to left.
Initial values of arrays:
shorts: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
longs: 0000000000000000 0000000000000000 0000000000000000
Array values after setting byte 3 = 25,
byte 6 = 64, byte 12 = 121, and byte 17 = 196:
shorts: 0000 C400 0000 0079 0000 0000 0040 0000 1900 0000
longs: 000000000000C400 0000007900000000 0040000019000000
*/
open System
// Display the array contents in hexadecimal.
let inline displayArray (arr: ^a []) name =
// Get the array element width; format the formatting string.
let elemWidth = Buffer.ByteLength arr / arr.Length
// Display the array elements from right to left.
printf $"{name,5}:"
for i = arr.Length - 1 downto 0 do
printf " %0*X" (2 * elemWidth) arr[i]
printfn ""
// These are the arrays to be modified with SetByte.
let shorts = Array.zeroCreate<int16> 10
let longs = Array.zeroCreate<int64> 3
printfn "This example of the Buffer.SetByte(Array, int, byte) \nmethod generates the following output.\nNote: The arrays are displayed from right to left.\n"
printfn " Initial values of arrays:\n"
// Display the initial values of the arrays.
displayArray shorts "shorts"
displayArray longs "longs"
// Copy two regions of source array to destination array,
// and two overlapped copies from source to source.
printfn "\n Array values after setting byte 3 = 25, \n byte 6 = 64, byte 12 = 121, and byte 17 = 196:\n"
Buffer.SetByte(shorts, 3, 25uy)
Buffer.SetByte(shorts, 6, 64uy)
Buffer.SetByte(shorts, 12, 121uy)
Buffer.SetByte(shorts, 17, 196uy)
Buffer.SetByte(longs, 3, 25uy)
Buffer.SetByte(longs, 6, 64uy)
Buffer.SetByte(longs, 12, 121uy)
Buffer.SetByte(longs, 17, 196uy)
// Display the arrays again.
displayArray shorts "shorts"
displayArray longs "longs"
// This example of the Buffer.SetByte( Array, int, byte )
// method generates the following output.
// Note: The arrays are displayed from right to left.
//
// Initial values of arrays:
//
// shorts: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
// longs: 0000000000000000 0000000000000000 0000000000000000
//
// Array values after setting byte 3 = 25,
// byte 6 = 64, byte 12 = 121, and byte 17 = 196:
//
// shorts: 0000 C400 0000 0079 0000 0000 0040 0000 1900 0000
// longs: 000000000000C400 0000007900000000 0040000019000000
' Example of the Buffer.SetByte method.
Module SetByteDemo
' Display the array contents in hexadecimal.
Sub DisplayArray( arr As Array, name As String )
' Get the array element width; format the formatting string.
Dim loopX As Integer
Dim elemWidth As Integer = _
Buffer.ByteLength( arr ) / arr.Length
Dim format As String = _
String.Format( " {{0:X{0}}}", 2 * elemWidth )
' Display the array elements from right to left.
Console.Write( "{0,7}:", name )
For loopX = arr.Length - 1 to 0 Step -1
Console.Write( format, arr( loopX ) )
Next loopX
Console.WriteLine( )
End Sub
Sub Main( )
' These are the arrays to be modified with SetByte.
' This allocates 10 elements for shorts and 3 elements
' for longs in Visual Basic.
Dim shorts( 9 ) As Short
Dim longs( 2 ) As Long
Console.WriteLine( "This example of the " & _
"Buffer.SetByte( Array, Integer, Byte ) " & vbCrLf & _
"method generates the following output." & vbCrLf & _
"Note: The arrays are displayed from right to left." & _
vbCrLf )
Console.WriteLine( " Initial values of arrays:" & vbCrLf )
' Display the initial values of the arrays.
DisplayArray( shorts, "shorts" )
DisplayArray( longs, "longs" )
' Copy two regions of source array to destination array,
' and two overlapped copies from source to source.
Console.WriteLine( vbCrLf & _
" Array values after setting byte 3 = 25, " & vbCrLf & _
" byte 6 = 64, byte 12 = 121, and byte 17 = 196:" & vbCrLf )
Buffer.SetByte( shorts, 3, 25 )
Buffer.SetByte( shorts, 6, 64 )
Buffer.SetByte( shorts, 12, 121 )
Buffer.SetByte( shorts, 17, 196 )
Buffer.SetByte( longs, 3, 25 )
Buffer.SetByte( longs, 6, 64 )
Buffer.SetByte( longs, 12, 121 )
Buffer.SetByte( longs, 17, 196 )
' Display the arrays again.
DisplayArray( shorts, "shorts" )
DisplayArray( longs, "longs" )
End Sub
End Module
' This example of the Buffer.SetByte( Array, Integer, Byte )
' method generates the following output.
' Note: The arrays are displayed from right to left.
'
' Initial values of arrays:
'
' shorts: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
' longs: 0000000000000000 0000000000000000 0000000000000000
'
' Array values after setting byte 3 = 25,
' byte 6 = 64, byte 12 = 121, and byte 17 = 196:
'
' shorts: 0000 C400 0000 0079 0000 0000 0040 0000 1900 0000
' longs: 000000000000C400 0000007900000000 0040000019000000
Hinweise
array muss ein Array von Grundtypen sein.