Buffer Buffer Buffer Buffer Class

Definition

Verändert Arrays von primitiven Typen.Manipulates arrays of primitive types.

public ref class Buffer abstract sealed
[System.Runtime.InteropServices.ComVisible(true)]
public static class Buffer
type Buffer = class
Public Class Buffer
Vererbung
BufferBufferBufferBuffer
Attribute

Beispiele

Das folgende Codebeispiel veranschaulicht die Verwendung von mehreren Buffer -Klassenmethoden.The following code example illustrates the use of several Buffer class methods.

// Example of the Buffer class methods.
using namespace System;

// Display the array elements from right to left in hexadecimal.
void DisplayArray( array<short>^arr )
{
   Console::Write( "  arr:" );
   for ( int loopX = arr->Length - 1; loopX >= 0; loopX-- )
      Console::Write( " {0:X4}", arr[ loopX ] );
   Console::WriteLine();
}

int main()
{
   
   // This array is to be modified and displayed.
   array<short>^arr = {258,259,260,261,262,263,264,265,266,267,268,269,270,271};
   Console::WriteLine( "This example of the Buffer class "
   "methods generates the following output.\n"
   "Note: The array is displayed from right to left.\n" );
   Console::WriteLine( "Initial values of array:\n" );
   
   // Display the initial array values and ByteLength.
   DisplayArray( arr );
   Console::WriteLine( "\nBuffer::ByteLength( arr ): {0}", Buffer::ByteLength( arr ) );
   
   // Copy a region of the array; set a byte within the array.
   Console::WriteLine( "\nCall these methods: \n"
   "  Buffer::BlockCopy( arr, 5, arr, 16, 9 ),\n"
   "  Buffer::SetByte( arr, 7, 170 ).\n" );
   Buffer::BlockCopy( arr, 5, arr, 16, 9 );
   Buffer::SetByte( arr, 7, 170 );
   
   // Display the array and a byte within the array.
   Console::WriteLine( "Final values of array:\n" );
   DisplayArray( arr );
   Console::WriteLine( "\nBuffer::GetByte( arr, 26 ): {0}", Buffer::GetByte( arr, 26 ) );
}

/*
This example of the Buffer class methods generates the following output.
Note: The array is displayed from right to left.

Initial values of array:

  arr: 010F 010E 010D 010C 010B 010A 0109 0108 0107 0106 0105 0104 0103 0102

Buffer::ByteLength( arr ): 28

Call these methods:
  Buffer::BlockCopy( arr, 5, arr, 16, 9 ),
  Buffer::SetByte( arr, 7, 170 ).

Final values of array:

  arr: 010F 0101 0801 0701 0601 0501 0109 0108 0107 0106 AA05 0104 0103 0102

Buffer::GetByte( arr, 26 ): 15
*/
// Example of the Buffer class methods.
using System;

class BufferClassDemo
{
    // Display the array elements from right to left in hexadecimal.
    public static void DisplayArray( short[ ] arr )
    {
        Console.Write( "  arr:" );
        for( int loopX = arr.Length - 1; loopX >= 0; loopX-- )
            Console.Write( " {0:X4}", arr[ loopX ] );
        Console.WriteLine( );
    }

    public static void Main( )
    {
        // This array is to be modified and displayed.
        short[ ] arr = { 258, 259, 260, 261, 262, 263, 264, 
                         265, 266, 267, 268, 269, 270, 271 };

        Console.WriteLine( "This example of the Buffer class " +
            "methods generates the following output.\n" +
            "Note: The array is displayed from right to left.\n" );
        Console.WriteLine( "Initial values of array:\n" );

        // Display the initial array values and ByteLength.
        DisplayArray( arr );
        Console.WriteLine( "\nBuffer.ByteLength( arr ): {0}", 
            Buffer.ByteLength( arr ) );

        // Copy a region of the array; set a byte within the array.
        Console.WriteLine( "\nCall these methods: \n" +
            "  Buffer.BlockCopy( arr, 5, arr, 16, 9 ),\n" +
            "  Buffer.SetByte( arr, 7, 170 ).\n" );

        Buffer.BlockCopy( arr, 5, arr, 16, 9 );
        Buffer.SetByte( arr, 7, 170 );

        // Display the array and a byte within the array.
        Console.WriteLine( "Final values of array:\n" );
        DisplayArray( arr );
        Console.WriteLine( "\nBuffer.GetByte( arr, 26 ): {0}", 
            Buffer.GetByte( arr, 26 ) );
    }
}

/*
This example of the Buffer class methods generates the following output.
Note: The array is displayed from right to left.

Initial values of array:

  arr: 010F 010E 010D 010C 010B 010A 0109 0108 0107 0106 0105 0104 0103 0102

Buffer.ByteLength( arr ): 28

Call these methods:
  Buffer.BlockCopy( arr, 5, arr, 16, 9 ),
  Buffer.SetByte( arr, 7, 170 ).

Final values of array:

  arr: 010F 0101 0801 0701 0601 0501 0109 0108 0107 0106 AA05 0104 0103 0102

Buffer.GetByte( arr, 26 ): 15
*/
' Example of the Buffer class methods.
Imports System
Imports Microsoft.VisualBasic

Module BufferClassDemo

    ' Display the array elements from right to left in hexadecimal.
    Sub DisplayArray( arr( ) As Short )

        Console.Write( "  arr:" )
        Dim loopX     As Integer
        For loopX = arr.Length - 1 To 0 Step -1
            Console.Write( " {0:X4}", arr( loopX ) )
        Next loopX
        Console.WriteLine( )
    End Sub

    Sub Main( )

        ' This array is to be modified and displayed.
        Dim arr( ) As Short = { 258, 259, 260, 261, 262, 263, 264, _
                                265, 266, 267, 268, 269, 270, 271 }
        Console.WriteLine( _
            "This example of the Buffer class methods generates " & _
            "the following output." & vbCrLf & "Note: The " & _
            "array is displayed from right to left." & vbCrLf )
        Console.WriteLine( "Initial values of array:" & vbCrLf )

        ' Display the initial array values and ByteLength.
        DisplayArray( arr )
        Console.WriteLine( vbCrLf & _
            "Buffer.ByteLength( arr ): {0}", _
            Buffer.ByteLength( arr ) )

        ' Copy a region of the array; set a byte within the array.
        Console.WriteLine( vbCrLf & _
            "Call these methods: " & vbCrLf & _
            "  Buffer.BlockCopy( arr, 5, arr, 16, 9 )," & vbCrLf & _
            "  Buffer.SetByte( arr, 7, 170 )." & vbCrLf )

        Buffer.BlockCopy( arr, 5, arr, 16, 9 )
        Buffer.SetByte( arr, 7, 170 )

        ' Display the array and a byte within the array.
        Console.WriteLine( "Final values of array:" & vbCrLf )
        DisplayArray( arr )
        Console.WriteLine( vbCrLf & _
            "Buffer.GetByte( arr, 26 ): {0}", _
            Buffer.GetByte( arr, 26 ) )
    End Sub 
End Module 

' This example of the Buffer class methods generates the following output.
' Note: The array is displayed from right to left.
' 
' Initial values of array:
' 
'   arr: 010F 010E 010D 010C 010B 010A 0109 0108 0107 0106 0105 0104 0103 0102
' 
' Buffer.ByteLength( arr ): 28
' 
' Call these methods:
'   Buffer.BlockCopy( arr, 5, arr, 16, 9 ),
'   Buffer.SetByte( arr, 7, 170 ).
' 
' Final values of array:
' 
'   arr: 010F 0101 0801 0701 0601 0501 0109 0108 0107 0106 AA05 0104 0103 0102
' 
' Buffer.GetByte( arr, 26 ): 15

Hinweise

Buffer wirkt sich nur auf Arrays von primitiven Typen; Diese Klasse gilt nicht für Objekte.Buffer only affects arrays of primitive types; this class does not apply to objects. Einzelnen primitiven Typen wird als eine Reihe von Bytes ohne Berücksichtigung der alle Verhalten oder die Beschränkung der primitive Typ zugeordneten behandelt.Each primitive type is treated as a series of bytes without regard to any behavior or limitation associated with the primitive type.

Buffer Stellt Methoden zum Kopieren von Bytes aus einem Array von primitiven Typen in ein anderes Array primitiver Typen, einen Byte aus einem Array zu erhalten, einen Byte in einem Array festgelegt, und die Länge eines Arrays zu erhalten.Buffer provides methods to copy bytes from one array of primitive types to another array of primitive types, get a byte from an array, set a byte in an array, and obtain the length of an array. Diese Klasse bietet eine bessere Leistung für die Bearbeitung von primitiven Typen als ähnliche Methoden in der System.Array Klasse.This class provides better performance for manipulating primitive types than similar methods in the System.Array class.

Buffer gilt für die folgenden primitiven Typen: Boolean, Char, SByte, Byte, Int16, UInt16, Int32, UInt32, Int64, UInt64, IntPtr, UIntPtr, Single, und Double.Buffer is applicable to the following primitive types: Boolean, Char, SByte, Byte, Int16, UInt16, Int32, UInt32, Int64, UInt64, IntPtr, UIntPtr, Single, and Double.

Methoden

BlockCopy(Array, Int32, Array, Int32, Int32) BlockCopy(Array, Int32, Array, Int32, Int32) BlockCopy(Array, Int32, Array, Int32, Int32) BlockCopy(Array, Int32, Array, Int32, Int32)

Kopiert eine angegebene Anzahl von Bytes aus einem Quellarray in ein Zielarray, jeweils beginnend bei einem bestimmten Offset.Copies a specified number of bytes from a source array starting at a particular offset to a destination array starting at a particular offset.

ByteLength(Array) ByteLength(Array) ByteLength(Array) ByteLength(Array)

Gibt die Anzahl der Bytes im angegebenen Array zurück.Returns the number of bytes in the specified array.

GetByte(Array, Int32) GetByte(Array, Int32) GetByte(Array, Int32) GetByte(Array, Int32)

Ruft das Byte an der angegebenen Position im angegebenen Array ab.Retrieves the byte at the specified location in the specified array.

MemoryCopy(Void*, Void*, Int64, Int64) MemoryCopy(Void*, Void*, Int64, Int64) MemoryCopy(Void*, Void*, Int64, Int64) MemoryCopy(Void*, Void*, Int64, Int64)

Kopiert eine als Long Integer-Wert angegebene Anzahl von Bytes aus einer Speicheradresse in eine andere Speicheradresse.Copies a number of bytes specified as a long integer value from one address in memory to another.

Diese API ist nicht CLS-kompatibel.This API is not CLS-compliant.

MemoryCopy(Void*, Void*, UInt64, UInt64) MemoryCopy(Void*, Void*, UInt64, UInt64) MemoryCopy(Void*, Void*, UInt64, UInt64) MemoryCopy(Void*, Void*, UInt64, UInt64)

Kopiert eine als Unsigned Long Integer-Wert angegebene Anzahl von Bytes aus einer Speicheradresse in eine andere Speicheradresse.Copies a number of bytes specified as an unsigned long integer value from one address in memory to another.

Diese API ist nicht CLS-kompatibel.This API is not CLS-compliant.

SetByte(Array, Int32, Byte) SetByte(Array, Int32, Byte) SetByte(Array, Int32, Byte) SetByte(Array, Int32, Byte)

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.

Gilt für: