Buffer.SetByte(Array, Int32, Byte) Buffer.SetByte(Array, Int32, Byte) Buffer.SetByte(Array, Int32, Byte) Method

Definition

Weist einem Byte an einer bestimmten Position eines angegebenen Arrays einen bestimmten Wert zu.Assigns a specified value to a byte at a particular location in a specified array.

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 -> unit

Parameter

array
Array Array Array

Ein Array.An array.

index
Int32 Int32 Int32

Eine Position im Array.A location in the array.

value
Byte Byte Byte

Ein zuzuweisender Wert.A value to assign.

Ausnahmen

array ist kein Array von Primitiven.array is not a primitive.

index ist negativ oder größer als die Länge von array.index is negative or greater than the length of array.

array ist größer als 2 Gigabyte (GB).array is larger than 2 gigabytes (GB).

Beispiele

Im folgenden Codebeispiel wird weist Werte auf Byte an bestimmten Positionen in Arrays mithilfe der SetByte Methode.The following code example assigns values to bytes at particular locations within arrays using the SetByte method.

// 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
*/
' Example of the Buffer.SetByte method.
Imports System
Imports Microsoft.VisualBasic

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 es sich um ein Array von primitiven Typen sein.array must be an array of primitives.

Gilt für: