BitConverter.ToUInt64 Méthode
Définition
Important
Certaines informations portent sur la préversion du produit qui est susceptible d’être en grande partie modifiée avant sa publication. Microsoft exclut toute garantie, expresse ou implicite, concernant les informations fournies ici.
Surcharges
| Nom | Description |
|---|---|
| ToUInt64(Byte[], Int32) |
Retourne un entier non signé 64 bits converti à partir de huit octets à une position spécifiée dans un tableau d’octets. |
| ToUInt64(ReadOnlySpan<Byte>) |
Convertit les octets en un long non signé. |
ToUInt64(Byte[], Int32)
- Source:
- BitConverter.cs
- Source:
- BitConverter.cs
- Source:
- BitConverter.cs
- Source:
- BitConverter.cs
- Source:
- BitConverter.cs
Important
Cette API n’est pas conforme CLS.
Retourne un entier non signé 64 bits converti à partir de huit octets à une position spécifiée dans un tableau d’octets.
public:
static System::UInt64 ToUInt64(cli::array <System::Byte> ^ value, int startIndex);
[System.CLSCompliant(false)]
public static ulong ToUInt64(byte[] value, int startIndex);
[<System.CLSCompliant(false)>]
static member ToUInt64 : byte[] * int -> uint64
Public Shared Function ToUInt64 (value As Byte(), startIndex As Integer) As ULong
Paramètres
- value
- Byte[]
Tableau d’octets qui inclut les huit octets à convertir.
- startIndex
- Int32
Position de départ dans value.
Retours
Entier non signé 64 bits formé par les huit octets commençant à startIndex.
- Attributs
Exceptions
startIndex est supérieur ou égal à la longueur de value moins 7, et est inférieur ou égal à la longueur de value moins 1.
value a la valeur null.
startIndex est inférieur à zéro ou supérieur à la longueur de value moins 1.
Exemples
L’exemple de code suivant convertit les éléments de Byte tableaux en UInt64 valeurs avec la ToUInt64 méthode.
// Example of the BitConverter.ToUInt64 method.
using System;
class BytesToUInt64Demo
{
const string formatter = "{0,5}{1,27}{2,24}";
// Convert eight byte array elements to a ulong and display it.
public static void BAToUInt64( byte[ ] bytes, int index )
{
ulong value = BitConverter.ToUInt64( bytes, index );
Console.WriteLine( formatter, index,
BitConverter.ToString( bytes, index, 8 ), value );
}
// Display a byte array, using multiple lines if necessary.
public static void WriteMultiLineByteArray( byte[ ] bytes )
{
const int rowSize = 20;
int iter;
Console.WriteLine( "initial byte array" );
Console.WriteLine( "------------------" );
for( iter = 0; iter < bytes.Length - rowSize; iter += rowSize )
{
Console.Write(
BitConverter.ToString( bytes, iter, rowSize ) );
Console.WriteLine( "-" );
}
Console.WriteLine( BitConverter.ToString( bytes, iter ) );
Console.WriteLine( );
}
public static void Main( )
{
byte[ ] byteArray = {
255, 255, 255, 0, 0, 0, 0, 0, 0, 0,
0, 1, 0, 0, 0, 100, 167, 179, 182, 224,
13, 0, 202, 154, 59, 0, 0, 0, 0, 170,
170, 170, 170, 170, 170, 0, 0, 232, 137, 4,
35, 199, 138, 255, 255, 255, 255, 255, 255, 255,
255, 127 };
Console.WriteLine(
"This example of the BitConverter.ToUInt64( byte[ ], " +
"int ) \nmethod generates the following output. It " +
"converts elements \nof a byte array to ulong values.\n" );
WriteMultiLineByteArray( byteArray );
Console.WriteLine( formatter, "index", "array elements",
"ulong" );
Console.WriteLine( formatter, "-----", "--------------",
"------" );
// Convert byte array elements to ulong values.
BAToUInt64( byteArray, 3 );
BAToUInt64( byteArray, 0 );
BAToUInt64( byteArray, 21 );
BAToUInt64( byteArray, 7 );
BAToUInt64( byteArray, 29 );
BAToUInt64( byteArray, 13 );
BAToUInt64( byteArray, 35 );
BAToUInt64( byteArray, 44 );
BAToUInt64( byteArray, 43 );
}
}
/*
This example of the BitConverter.ToUInt64( byte[ ], int )
method generates the following output. It converts elements
of a byte array to ulong values.
initial byte array
------------------
FF-FF-FF-00-00-00-00-00-00-00-00-01-00-00-00-64-A7-B3-B6-E0-
0D-00-CA-9A-3B-00-00-00-00-AA-AA-AA-AA-AA-AA-00-00-E8-89-04-
23-C7-8A-FF-FF-FF-FF-FF-FF-FF-FF-7F
index array elements ulong
----- -------------- ------
3 00-00-00-00-00-00-00-00 0
0 FF-FF-FF-00-00-00-00-00 16777215
21 00-CA-9A-3B-00-00-00-00 1000000000
7 00-00-00-00-01-00-00-00 4294967296
29 AA-AA-AA-AA-AA-AA-00-00 187649984473770
13 00-00-64-A7-B3-B6-E0-0D 1000000000000000000
35 00-00-E8-89-04-23-C7-8A 10000000000000000000
44 FF-FF-FF-FF-FF-FF-FF-7F 9223372036854775807
43 FF-FF-FF-FF-FF-FF-FF-FF 18446744073709551615
*/
open System
let print obj1 obj2 obj3 = printfn $"{obj1,5}{obj2,27}{obj3,24}"
// Convert eight byte array elements to a ulong and display it.
let BAToUInt64 bytes index =
let value = BitConverter.ToUInt64(bytes, index)
print index (BitConverter.ToString(bytes, index, 8)) value
// Display a byte array, using multiple lines if necessary.
let writeMultiLineByteArray (bytes: byte []) =
let rowSize = 20
printfn "initial byte array"
printfn "------------------"
let mutable iter = 0
for i in 0 .. rowSize .. bytes.Length - rowSize - 1 do
printfn $"{BitConverter.ToString(bytes, i, rowSize)}-"
iter <- i
printfn $"{BitConverter.ToString(bytes, iter + rowSize)}\n"
let byteArray =
[| 255uy; 255uy; 255uy; 0uy; 0uy; 0uy; 0uy; 0uy; 0uy; 0uy
0uy; 1uy; 0uy; 0uy; 0uy; 100uy; 167uy; 179uy; 182uy; 224uy
13uy; 0uy; 202uy; 154uy; 59uy; 0uy; 0uy; 0uy; 0uy; 170uy
170uy; 170uy; 170uy; 170uy; 170uy; 0uy; 0uy; 232uy; 137uy; 4uy
35uy; 199uy; 138uy; 255uy; 255uy; 255uy; 255uy; 255uy; 255uy; 255uy
255uy; 127uy |]
printfn "This example of the BitConverter.ToUInt64(byte [], int) \nmethod generates the following output. It converts elements \nof a byte array to ulong values.\n"
writeMultiLineByteArray byteArray
print "index" "array elements" "ulong"
print "-----" "--------------" "------"
// Convert byte array elements to ulong values.
BAToUInt64 byteArray 3
BAToUInt64 byteArray 0
BAToUInt64 byteArray 21
BAToUInt64 byteArray 7
BAToUInt64 byteArray 29
BAToUInt64 byteArray 13
BAToUInt64 byteArray 35
BAToUInt64 byteArray 44
BAToUInt64 byteArray 43
// This example of the BitConverter.ToUInt64( byte[ ], int )
// method generates the following output. It converts elements
// of a byte array to ulong values.
//
// initial byte array
// ------------------
// FF-FF-FF-00-00-00-00-00-00-00-00-01-00-00-00-64-A7-B3-B6-E0-
// 0D-00-CA-9A-3B-00-00-00-00-AA-AA-AA-AA-AA-AA-00-00-E8-89-04-
// 23-C7-8A-FF-FF-FF-FF-FF-FF-FF-FF-7F
//
// index array elements ulong
// ----- -------------- ------
// 3 00-00-00-00-00-00-00-00 0
// 0 FF-FF-FF-00-00-00-00-00 16777215
// 21 00-CA-9A-3B-00-00-00-00 1000000000
// 7 00-00-00-00-01-00-00-00 4294967296
// 29 AA-AA-AA-AA-AA-AA-00-00 187649984473770
// 13 00-00-64-A7-B3-B6-E0-0D 1000000000000000000
// 35 00-00-E8-89-04-23-C7-8A 10000000000000000000
// 44 FF-FF-FF-FF-FF-FF-FF-7F 9223372036854775807
// 43 FF-FF-FF-FF-FF-FF-FF-FF 18446744073709551615
' Example of the BitConverter.ToUInt64 method.
Module BytesToUInt64Demo
Const formatter As String = "{0,5}{1,27}{2,24}"
' Convert eight Byte array elements to a UInt64 and display it.
Sub BAToUInt64( bytes( ) As Byte, index As Integer )
Dim value As UInt64 = BitConverter.ToUInt64( bytes, index )
Console.WriteLine( formatter, index, _
BitConverter.ToString( bytes, index, 8 ), value )
End Sub
' Display a Byte array, using multiple lines if necessary.
Sub WriteMultiLineByteArray( bytes( ) As Byte )
Const rowSize As Integer = 20
Dim iter As Integer
Console.WriteLine( "initial Byte array" )
Console.WriteLine( "------------------" )
For iter = 0 To bytes.Length - rowSize - 1 Step rowSize
Console.Write( _
BitConverter.ToString( bytes, iter, rowSize ) )
Console.WriteLine( "-" )
Next iter
Console.WriteLine( BitConverter.ToString( bytes, iter ) )
Console.WriteLine( )
End Sub
Sub Main( )
Dim byteArray as Byte( ) = { _
255, 255, 255, 0, 0, 0, 0, 0, 0, 0, _
0, 1, 0, 0, 0, 100, 167, 179, 182, 224, _
13, 0, 202, 154, 59, 0, 0, 0, 0, 170, _
170, 170, 170, 170, 170, 0, 0, 232, 137, 4, _
35, 199, 138, 255, 255, 255, 255, 255, 255, 255, _
255, 127 }
Console.WriteLine( _
"This example of the BitConverter.ToUInt64( Byte( ), " & _
"Integer ) " & vbCrLf & "method generates the " & _
"following output. It converts elements " & vbCrLf & _
"of a Byte array to UInt64 values." & vbCrLf )
WriteMultiLineByteArray( byteArray )
Console.WriteLine( formatter, "index", "array elements", _
"UInt64" )
Console.WriteLine( formatter, "-----", "--------------", _
"------" )
' Convert Byte array elements to UInt64 values.
BAToUInt64( byteArray, 3 )
BAToUInt64( byteArray, 0 )
BAToUInt64( byteArray, 21 )
BAToUInt64( byteArray, 7 )
BAToUInt64( byteArray, 29 )
BAToUInt64( byteArray, 13 )
BAToUInt64( byteArray, 35 )
BAToUInt64( byteArray, 44 )
BAToUInt64( byteArray, 43 )
End Sub
End Module
' This example of the BitConverter.ToUInt64( Byte( ), Integer )
' method generates the following output. It converts elements
' of a Byte array to UInt64 values.
'
' initial Byte array
' ------------------
' FF-FF-FF-00-00-00-00-00-00-00-00-01-00-00-00-64-A7-B3-B6-E0-
' 0D-00-CA-9A-3B-00-00-00-00-AA-AA-AA-AA-AA-AA-00-00-E8-89-04-
' 23-C7-8A-FF-FF-FF-FF-FF-FF-FF-FF-7F
'
' index array elements UInt64
' ----- -------------- ------
' 3 00-00-00-00-00-00-00-00 0
' 0 FF-FF-FF-00-00-00-00-00 16777215
' 21 00-CA-9A-3B-00-00-00-00 1000000000
' 7 00-00-00-00-01-00-00-00 4294967296
' 29 AA-AA-AA-AA-AA-AA-00-00 187649984473770
' 13 00-00-64-A7-B3-B6-E0-0D 1000000000000000000
' 35 00-00-E8-89-04-23-C7-8A 10000000000000000000
' 44 FF-FF-FF-FF-FF-FF-FF-7F 9223372036854775807
' 43 FF-FF-FF-FF-FF-FF-FF-FF 18446744073709551615
Remarques
La ToUInt64 méthode convertit les octets de l’index startIndex en startIndex + 7 en UInt64 valeur. L’ordre des octets dans le tableau doit refléter l’endianité de l’architecture du système informatique. Pour plus d’informations, consultez la section Notes de la BitConverter rubrique de classe.
Voir aussi
S’applique à
ToUInt64(ReadOnlySpan<Byte>)
- Source:
- BitConverter.cs
- Source:
- BitConverter.cs
- Source:
- BitConverter.cs
- Source:
- BitConverter.cs
- Source:
- BitConverter.cs
Important
Cette API n’est pas conforme CLS.
Convertit les octets en un long non signé.
public:
static System::UInt64 ToUInt64(ReadOnlySpan<System::Byte> value);
[System.CLSCompliant(false)]
public static ulong ToUInt64(ReadOnlySpan<byte> value);
[<System.CLSCompliant(false)>]
static member ToUInt64 : ReadOnlySpan<byte> -> uint64
Public Shared Function ToUInt64 (value As ReadOnlySpan(Of Byte)) As ULong
Paramètres
- value
- ReadOnlySpan<Byte>
Étendue en lecture seule contenant les octets à convertir.
Retours
Entier non signé 64 bits représentant les octets convertis.
- Attributs
Exceptions
La longueur est value inférieure à 8.