Buffer.SetByte(Array, Int32, Byte) Methode

Referenz

Definition

Namespace:: System

Assembly:: System.Runtime.dll

Assembly:: mscorlib.dll

Assembly:: netstandard.dll

Wichtig

Einige Informationen beziehen sich auf Vorabversionen, die vor dem Release ggf. grundlegend überarbeitet werden. Microsoft übernimmt hinsichtlich der hier bereitgestellten Informationen keine Gewährleistungen, seien sie ausdrücklich oder konkludent.

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 -> unit

Public 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

ArgumentException

array ist kein Array von Primitiven.

ArgumentNullException

array ist null.

ArgumentOutOfRangeException

index ist negativ oder größer als die Länge von array.

OverflowException

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.

Gilt für

Freigeben über