Buffer.SetByte(Array, Int32, Byte) Metodo
In questo articolo
Definizione
Importante
Alcune informazioni sono relative alla release non definitiva del prodotto, che potrebbe subire modifiche significative prima della release definitiva. Microsoft non riconosce alcuna garanzia, espressa o implicita, in merito alle informazioni qui fornite.
Assegna un valore specificato a un byte in una particolare posizione in una determinata matrice.
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)
- array
- Array
Matrice .
- index
- Int32
Una posizione nella matrice.
- value
- Byte
Un valore da assegnare.
array
non è un primitivo.
array
è null
.
index
è negativo o maggiore della lunghezza di array
.
array
è superiore a 2 gigabyte (GB).
Nell'esempio di codice seguente vengono assegnati valori a byte in posizioni specifiche all'interno di matrici usando il SetByte
metodo .
// 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
array
deve essere una matrice di primitive.
Si applica a
Prodotto | Versioni |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1 |
UWP | 10.0 |