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BitConverter.ToInt64 Metoda

Definice

Přetížení

ToInt64(ReadOnlySpan<Byte>)

Převede bajt jen pro čtení na 64bitové celé číslo podepsaného.

ToInt64(Byte[], Int32)

Vrátí 64bitové celé číslo podepsané z osmi bajtů na zadané pozici v bajtovém poli.

ToInt64(ReadOnlySpan<Byte>)

Převede bajt jen pro čtení na 64bitové celé číslo podepsaného.

public:
 static long ToInt64(ReadOnlySpan<System::Byte> value);
public static long ToInt64 (ReadOnlySpan<byte> value);
static member ToInt64 : ReadOnlySpan<byte> -> int64
Public Shared Function ToInt64 (value As ReadOnlySpan(Of Byte)) As Long

Parametry

value
ReadOnlySpan<Byte>

Rozsah jen pro čtení obsahující bajty, které se mají převést.

Návraty

Int64

64bitové celé číslo podepsaného představující převedené bajty.

Výjimky

Délka value je menší než 8.

Platí pro

ToInt64(Byte[], Int32)

Vrátí 64bitové celé číslo podepsané z osmi bajtů na zadané pozici v bajtovém poli.

public:
 static long ToInt64(cli::array <System::Byte> ^ value, int startIndex);
public static long ToInt64 (byte[] value, int startIndex);
static member ToInt64 : byte[] * int -> int64
Public Shared Function ToInt64 (value As Byte(), startIndex As Integer) As Long

Parametry

value
Byte[]

Pole bajtů, které zahrnuje osm bajtů, které se mají převést.

startIndex
Int32

Počáteční pozice uvnitř value.

Návraty

Int64

64bitové celé číslo podepsané číslem tvořené osmi bajty počínaje .startIndex

Výjimky

startIndex je větší nebo rovno délce value minus 7 a je menší nebo rovno délce value minus 1.

value je null.

startIndex je menší než nula nebo větší než délka value minus 1.

Příklady

Následující příklad kódu převede prvky Byte polí na Int64 hodnoty pomocí ToInt64 metody.

// Example of the BitConverter::ToInt64 method.
using namespace System;

// Convert eight byte array elements to an __int64 and display it.
void BAToInt64( array<unsigned char>^bytes, int index )
{
   __int64 value = BitConverter::ToInt64( bytes, index );
   Console::WriteLine( "{0,5}{1,27}{2,24}", index, BitConverter::ToString( bytes, index, 8 ), value );
}


// Display a byte array, using multiple lines if necessary.
void WriteMultiLineByteArray( array<unsigned char>^bytes )
{
   const int rowSize = 20;
   int iter;
   Console::WriteLine( "initial unsigned char 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();
}

int main()
{
   array<unsigned char>^byteArray = {0,54,101,196,255,255,255,255,0,0,0,0,0,0,0,0,128,0,202,154,59,0,0,0,0,1,0,0,0,0,255,255,255,255,1,0,0,255,255,255,255,255,255,255,127,86,85,85,85,85,85,255,255,170,170,170,170,170,170,0,0,100,167,179,182,224,13,0,0,156,88,76,73,31,242};
   Console::WriteLine( "This example of the BitConverter::ToInt64( unsigned "
   "char[ ], int ) \nmethod generates the following output. It "
   "converts elements of a \nbyte array to __int64 values.\n" );
   WriteMultiLineByteArray( byteArray );
   Console::WriteLine( "{0,5}{1,27}{2,24}", "index", "array elements", "__int64" );
   Console::WriteLine( "{0,5}{1,27}{2,24}", "-----", "--------------", "-------" );
   
   // Convert byte array elements to __int64 values.
   BAToInt64( byteArray, 8 );
   BAToInt64( byteArray, 5 );
   BAToInt64( byteArray, 34 );
   BAToInt64( byteArray, 17 );
   BAToInt64( byteArray, 0 );
   BAToInt64( byteArray, 21 );
   BAToInt64( byteArray, 26 );
   BAToInt64( byteArray, 53 );
   BAToInt64( byteArray, 45 );
   BAToInt64( byteArray, 59 );
   BAToInt64( byteArray, 67 );
   BAToInt64( byteArray, 37 );
   BAToInt64( byteArray, 9 );
}

/*
This example of the BitConverter::ToInt64( unsigned char[ ], int )
method generates the following output. It converts elements of a
byte array to __int64 values.

initial unsigned char array
---------------------------
00-36-65-C4-FF-FF-FF-FF-00-00-00-00-00-00-00-00-80-00-CA-9A-
3B-00-00-00-00-01-00-00-00-00-FF-FF-FF-FF-01-00-00-FF-FF-FF-
FF-FF-FF-FF-7F-56-55-55-55-55-55-FF-FF-AA-AA-AA-AA-AA-AA-00-
00-64-A7-B3-B6-E0-0D-00-00-9C-58-4C-49-1F-F2

index             array elements                 __int64
-----             --------------                 -------
    8    00-00-00-00-00-00-00-00                       0
    5    FF-FF-FF-00-00-00-00-00                16777215
   34    01-00-00-FF-FF-FF-FF-FF               -16777215
   17    00-CA-9A-3B-00-00-00-00              1000000000
    0    00-36-65-C4-FF-FF-FF-FF             -1000000000
   21    00-00-00-00-01-00-00-00              4294967296
   26    00-00-00-00-FF-FF-FF-FF             -4294967296
   53    AA-AA-AA-AA-AA-AA-00-00         187649984473770
   45    56-55-55-55-55-55-FF-FF        -187649984473770
   59    00-00-64-A7-B3-B6-E0-0D     1000000000000000000
   67    00-00-9C-58-4C-49-1F-F2    -1000000000000000000
   37    FF-FF-FF-FF-FF-FF-FF-7F     9223372036854775807
    9    00-00-00-00-00-00-00-80    -9223372036854775808
*/
// Example of the BitConverter.ToInt64 method.
using System;

class BytesToInt64Demo
{
    const string formatter = "{0,5}{1,27}{2,24}";

    // Convert eight byte array elements to a long and display it.
    public static void BAToInt64( byte[ ] bytes, int index )
    {
        long value = BitConverter.ToInt64( 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 = {
              0,  54, 101, 196, 255, 255, 255, 255,   0,   0,
              0,   0,   0,   0,   0,   0, 128,   0, 202, 154,
             59,   0,   0,   0,   0,   1,   0,   0,   0,   0,
            255, 255, 255, 255,   1,   0,   0, 255, 255, 255,
            255, 255, 255, 255, 127,  86,  85,  85,  85,  85,
             85, 255, 255, 170, 170, 170, 170, 170, 170,   0,
              0, 100, 167, 179, 182, 224,  13,   0,   0, 156,
             88,  76,  73,  31, 242 };

        Console.WriteLine(
            "This example of the BitConverter.ToInt64( byte[ ], " +
            "int ) \nmethod generates the following output. It " +
            "converts elements \nof a byte array to long values.\r\n" );

        WriteMultiLineByteArray( byteArray );

        Console.WriteLine( formatter, "index", "array elements", "long" );
        Console.WriteLine( formatter, "-----", "--------------", "----" );

        // Convert byte array elements to long values.
        BAToInt64( byteArray, 8 );
        BAToInt64( byteArray, 5 );
        BAToInt64( byteArray, 34 );
        BAToInt64( byteArray, 17 );
        BAToInt64( byteArray, 0 );
        BAToInt64( byteArray, 21 );
        BAToInt64( byteArray, 26 );
        BAToInt64( byteArray, 53 );
        BAToInt64( byteArray, 45 );
        BAToInt64( byteArray, 59 );
        BAToInt64( byteArray, 67 );
        BAToInt64( byteArray, 37 );
        BAToInt64( byteArray, 9 );
    }
}

/*
This example of the BitConverter.ToInt64( byte[ ], int )
method generates the following output. It converts elements
of a byte array to long values.

initial byte array
------------------
00-36-65-C4-FF-FF-FF-FF-00-00-00-00-00-00-00-00-80-00-CA-9A-
3B-00-00-00-00-01-00-00-00-00-FF-FF-FF-FF-01-00-00-FF-FF-FF-
FF-FF-FF-FF-7F-56-55-55-55-55-55-FF-FF-AA-AA-AA-AA-AA-AA-00-
00-64-A7-B3-B6-E0-0D-00-00-9C-58-4C-49-1F-F2

index             array elements                    long
-----             --------------                    ----
    8    00-00-00-00-00-00-00-00                       0
    5    FF-FF-FF-00-00-00-00-00                16777215
   34    01-00-00-FF-FF-FF-FF-FF               -16777215
   17    00-CA-9A-3B-00-00-00-00              1000000000
    0    00-36-65-C4-FF-FF-FF-FF             -1000000000
   21    00-00-00-00-01-00-00-00              4294967296
   26    00-00-00-00-FF-FF-FF-FF             -4294967296
   53    AA-AA-AA-AA-AA-AA-00-00         187649984473770
   45    56-55-55-55-55-55-FF-FF        -187649984473770
   59    00-00-64-A7-B3-B6-E0-0D     1000000000000000000
   67    00-00-9C-58-4C-49-1F-F2    -1000000000000000000
   37    FF-FF-FF-FF-FF-FF-FF-7F     9223372036854775807
    9    00-00-00-00-00-00-00-80    -9223372036854775808
*/
open System

let print obj1 obj2 obj3 = printfn $"{obj1,5}{obj2,27}{obj3,24}"

// Convert eight byte array elements to a long and display it.
let BAToInt64 bytes index =
    let value = BitConverter.ToInt64(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)}"

let byteArray =
    [| 0uy; 54uy; 101uy; 196uy; 255uy; 255uy; 255uy; 255uy; 0uy; 0uy
       0uy; 0uy; 0uy; 0uy; 0uy; 0uy; 128uy; 0uy; 202uy; 154uy
       59uy; 0uy; 0uy; 0uy; 0uy; 1uy; 0uy; 0uy; 0uy; 0uy
       255uy; 255uy; 255uy; 255uy; 1uy; 0uy; 0uy; 255uy; 255uy; 255uy
       255uy; 255uy; 255uy; 255uy; 127uy; 86uy; 85uy; 85uy; 85uy; 85uy
       85uy; 255uy; 255uy; 170uy; 170uy; 170uy; 170uy; 170uy; 170uy; 0uy
       0uy; 100uy; 167uy; 179uy; 182uy; 224uy; 13uy; 0uy; 0uy; 156uy
       88uy; 76uy; 73uy; 31uy; 242uy |]

printfn "This example of the BitConverter.ToInt64(byte [], int) \nmethod generates the following output. It converts elements \nof a byte array to long values.\r\n"

writeMultiLineByteArray byteArray

print "index" "array elements" "long"
print "-----" "--------------" "----"

// Convert byte array elements to long values.
BAToInt64 byteArray 8
BAToInt64 byteArray 5
BAToInt64 byteArray 34
BAToInt64 byteArray 17
BAToInt64 byteArray 0
BAToInt64 byteArray 21
BAToInt64 byteArray 26
BAToInt64 byteArray 53
BAToInt64 byteArray 45
BAToInt64 byteArray 59
BAToInt64 byteArray 67
BAToInt64 byteArray 37
BAToInt64 byteArray 9


// This example of the BitConverter.ToInt64( byte[ ], int )
// method generates the following output. It converts elements
// of a byte array to long values.
//
// initial byte array
// ------------------
// 00-36-65-C4-FF-FF-FF-FF-00-00-00-00-00-00-00-00-80-00-CA-9A-
// 3B-00-00-00-00-01-00-00-00-00-FF-FF-FF-FF-01-00-00-FF-FF-FF-
// FF-FF-FF-FF-7F-56-55-55-55-55-55-FF-FF-AA-AA-AA-AA-AA-AA-00-
// 00-64-A7-B3-B6-E0-0D-00-00-9C-58-4C-49-1F-F2
//
// index             array elements                    long
// -----             --------------                    ----
//     8    00-00-00-00-00-00-00-00                       0
//     5    FF-FF-FF-00-00-00-00-00                16777215
//    34    01-00-00-FF-FF-FF-FF-FF               -16777215
//    17    00-CA-9A-3B-00-00-00-00              1000000000
//     0    00-36-65-C4-FF-FF-FF-FF             -1000000000
//    21    00-00-00-00-01-00-00-00              4294967296
//    26    00-00-00-00-FF-FF-FF-FF             -4294967296
//    53    AA-AA-AA-AA-AA-AA-00-00         187649984473770
//    45    56-55-55-55-55-55-FF-FF        -187649984473770
//    59    00-00-64-A7-B3-B6-E0-0D     1000000000000000000
//    67    00-00-9C-58-4C-49-1F-F2    -1000000000000000000
//    37    FF-FF-FF-FF-FF-FF-FF-7F     9223372036854775807
//     9    00-00-00-00-00-00-00-80    -9223372036854775808
' Example of the BitConverter.ToInt64 method.
Module BytesToInt64Demo

    Const formatter As String = "{0,5}{1,27}{2,24}"
 
    ' Convert eight Byte array elements to a Long and display it.
    Sub BAToInt64( bytes( ) As Byte, index As Integer )

        Dim value As Long = BitConverter.ToInt64( 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( ) = { _
              0,  54, 101, 196, 255, 255, 255, 255,   0,   0, _
              0,   0,   0,   0,   0,   0, 128,   0, 202, 154, _
             59,   0,   0,   0,   0,   1,   0,   0,   0,   0, _
            255, 255, 255, 255,   1,   0,   0, 255, 255, 255, _
            255, 255, 255, 255, 127,  86,  85,  85,  85,  85, _
             85, 255, 255, 170, 170, 170, 170, 170, 170,   0, _
              0, 100, 167, 179, 182, 224,  13,   0,   0, 156, _
             88,  76,  73,  31, 242 }

        Console.WriteLine( _
            "This example of the BitConverter.ToInt64( Byte( ), " & _
            "Integer ) " & vbCrLf & "method generates the " & _
            "following output. It converts elements " & vbCrLf & _
            "of a Byte array to Long values." & vbCrLf )

        WriteMultiLineByteArray( byteArray )

        Console.WriteLine( formatter, "index", "array elements", _
            "Long" )
        Console.WriteLine( formatter, "-----", "--------------", _
            "----" )
          
        ' Convert Byte array elements to Long values.
        BAToInt64( byteArray, 8 )
        BAToInt64( byteArray, 5 )
        BAToInt64( byteArray, 34 )
        BAToInt64( byteArray, 17 )
        BAToInt64( byteArray, 0 )
        BAToInt64( byteArray, 21 )
        BAToInt64( byteArray, 26 )
        BAToInt64( byteArray, 53 )
        BAToInt64( byteArray, 45 )
        BAToInt64( byteArray, 59 )
        BAToInt64( byteArray, 67 )
        BAToInt64( byteArray, 37 )
        BAToInt64( byteArray, 9 )
    End Sub 
End Module

' This example of the BitConverter.ToInt64( Byte( ), Integer )
' method generates the following output. It converts elements
' of a Byte array to Long values.
' 
' initial Byte array
' ------------------
' 00-36-65-C4-FF-FF-FF-FF-00-00-00-00-00-00-00-00-80-00-CA-9A-
' 3B-00-00-00-00-01-00-00-00-00-FF-FF-FF-FF-01-00-00-FF-FF-FF-
' FF-FF-FF-FF-7F-56-55-55-55-55-55-FF-FF-AA-AA-AA-AA-AA-AA-00-
' 00-64-A7-B3-B6-E0-0D-00-00-9C-58-4C-49-1F-F2
' 
' index             array elements                    Long
' -----             --------------                    ----
'     8    00-00-00-00-00-00-00-00                       0
'     5    FF-FF-FF-00-00-00-00-00                16777215
'    34    01-00-00-FF-FF-FF-FF-FF               -16777215
'    17    00-CA-9A-3B-00-00-00-00              1000000000
'     0    00-36-65-C4-FF-FF-FF-FF             -1000000000
'    21    00-00-00-00-01-00-00-00              4294967296
'    26    00-00-00-00-FF-FF-FF-FF             -4294967296
'    53    AA-AA-AA-AA-AA-AA-00-00         187649984473770
'    45    56-55-55-55-55-55-FF-FF        -187649984473770
'    59    00-00-64-A7-B3-B6-E0-0D     1000000000000000000
'    67    00-00-9C-58-4C-49-1F-F2    -1000000000000000000
'    37    FF-FF-FF-FF-FF-FF-FF-7F     9223372036854775807
'     9    00-00-00-00-00-00-00-80    -9223372036854775808

Poznámky

Metoda ToInt64 převede bajty z indexu startIndex na startIndex + 7 na Int64 hodnotu. Pořadí bajtů v poli musí odrážet endianitu architektury počítačového systému. Další informace najdete v části Poznámky tématu předmětu BitConverter .

Viz také

Platí pro