BitConverter.ToInt64 BitConverter.ToInt64 BitConverter.ToInt64 BitConverter.ToInt64 Method

定义

重载

ToInt64(ReadOnlySpan<Byte>) ToInt64(ReadOnlySpan<Byte>) ToInt64(ReadOnlySpan<Byte>) ToInt64(ReadOnlySpan<Byte>)
ToInt64(Byte[], Int32) ToInt64(Byte[], Int32) ToInt64(Byte[], Int32) ToInt64(Byte[], Int32)

返回从字节数组中指定位置的八个字节转换来的 64 位有符号的整数。Returns a 64-bit signed integer converted from eight bytes at a specified position in a byte array.

ToInt64(ReadOnlySpan<Byte>) ToInt64(ReadOnlySpan<Byte>) ToInt64(ReadOnlySpan<Byte>) ToInt64(ReadOnlySpan<Byte>)

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

参数

返回

ToInt64(Byte[], Int32) ToInt64(Byte[], Int32) ToInt64(Byte[], Int32) ToInt64(Byte[], Int32)

返回从字节数组中指定位置的八个字节转换来的 64 位有符号的整数。Returns a 64-bit signed integer converted from eight bytes at a specified position in a byte array.

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

参数

value
Byte[]

字节数组。An array of bytes.

startIndex
Int32 Int32 Int32 Int32

value 内的起始位置。The starting position within value.

返回

64 位有符号的整数的构成方法为 8 个字节开始startIndexA 64-bit signed integer formed by eight bytes beginning at startIndex.

异常

startIndex 大于或等于的长度value减去 7,且小于或等于的长度value减 1。startIndex is greater than or equal to the length of value minus 7, and is less than or equal to the length of value minus 1.

startIndex 小于零或大于的长度value减 1。startIndex is less than zero or greater than the length of value minus 1.

示例

下面的代码示例将转换的元素Byte到数组Int64值替换ToInt64方法。The following code example converts elements of Byte arrays to Int64 values with the ToInt64 method.

// 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
*/
' Example of the BitConverter.ToInt64 method.
Imports System
Imports Microsoft.VisualBasic

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

注解

ToInt64方法将字节转换从索引startIndexstartIndex+ 7 到Int64值。The ToInt64 method converts the bytes from index startIndex to startIndex + 7 to a Int64 value. 数组中的字节顺序必须反映计算机系统的体系结构; 字节的顺序有关详细信息,请参阅备注部分的BitConverter类主题。The order of bytes in the array must reflect the endianness of the computer system's architecture; for more information, see the Remarks section of the BitConverter class topic.

另请参阅

适用于