BitConverter.ToChar BitConverter.ToChar BitConverter.ToChar BitConverter.ToChar Method

定义

重载

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

返回两个字节转换的字节数组中指定位置处的 Unicode 字符。Returns a Unicode character converted from two bytes at a specified position in a byte array.

ToChar(ReadOnlySpan<Byte>) ToChar(ReadOnlySpan<Byte>) ToChar(ReadOnlySpan<Byte>) ToChar(ReadOnlySpan<Byte>)

public:
 static char ToChar(ReadOnlySpan<System::Byte> value);
public static char ToChar (ReadOnlySpan<byte> value);
static member ToChar : ReadOnlySpan<byte> -> char
Public Shared Function ToChar (value As ReadOnlySpan(Of Byte)) As Char

参数

返回

ToChar(Byte[], Int32) ToChar(Byte[], Int32) ToChar(Byte[], Int32) ToChar(Byte[], Int32)

返回两个字节转换的字节数组中指定位置处的 Unicode 字符。Returns a Unicode character converted from two bytes at a specified position in a byte array.

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

参数

value
Byte[]

一个数组。An array.

startIndex
Int32 Int32 Int32 Int32

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

返回

一个字符由开始的两个字节构成、 startIndexA character formed by two bytes beginning at startIndex.

异常

startIndex 长度等于value减 1。startIndex equals 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Char值 (Unicode 字符) 替换ToChar方法。The following code example converts elements of Byte arrays to Char values (Unicode characters) with the ToChar method.

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

// Convert two byte array elements to a __wchar_t and display it.
void BAToChar( array<unsigned char>^bytes, int index )
{
   __wchar_t value = BitConverter::ToChar( bytes, index );
   Console::WriteLine( "{0,5}{1,17}{2,11}", index, BitConverter::ToString( bytes, index, 2 ), value );
}

int main()
{
   array<unsigned char>^byteArray = {32,0,0,42,0,65,0,125,0,197,0,168,3,41,4,172,32};
   Console::WriteLine( "This example of the BitConverter::ToChar( unsigned "
   "char[ ], int ) \nmethod generates the following output. It "
   "converts elements of a \nbyte array to __wchar_t values.\n" );
   Console::WriteLine( "initial unsigned char array" );
   Console::WriteLine( "---------------------------" );
   Console::WriteLine( BitConverter::ToString( byteArray ) );
   Console::WriteLine();
   Console::WriteLine( "{0,5}{1,17}{2,11}", "index", "array elements", "__wchar_t" );
   Console::WriteLine( "{0,5}{1,17}{2,11}", "-----", "--------------", "---------" );
   
   // Convert byte array elements to __wchar_t values.
   BAToChar( byteArray, 0 );
   BAToChar( byteArray, 1 );
   BAToChar( byteArray, 3 );
   BAToChar( byteArray, 5 );
   BAToChar( byteArray, 7 );
   BAToChar( byteArray, 9 );
   BAToChar( byteArray, 11 );
   BAToChar( byteArray, 13 );
   BAToChar( byteArray, 15 );
}

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

initial unsigned char array
---------------------------
20-00-00-2A-00-41-00-7D-00-C5-00-A8-03-29-04-AC-20

index   array elements  __wchar_t
-----   --------------  ---------
    0            20-00
    1            00-00
    3            2A-00          *
    5            41-00          A
    7            7D-00          }
    9            C5-00          �
   11            A8-03          ?
   13            29-04          ?
   15            AC-20          ?
*/
// Example of the BitConverter.ToChar method.
using System;

class BytesToCharDemo
{
    const string formatter = "{0,5}{1,17}{2,8}";
 
    // Convert two byte array elements to a char and display it.
    public static void BAToChar( byte[] bytes, int index )
    {
        char value = BitConverter.ToChar( bytes, index );

        Console.WriteLine( formatter, index, 
            BitConverter.ToString( bytes, index, 2 ), value );
    }
       
    public static void Main( )
    {
        byte[] byteArray = {
             32,   0,   0,  42,   0,  65,   0, 125,   0, 
            197,   0, 168,   3,  41,   4, 172,  32 };

        Console.WriteLine( 
            "This example of the BitConverter.ToChar( byte[ ], " +
            "int ) \nmethod generates the following output. It " +
            "converts \nelements of a byte array to char values.\n" );
        Console.WriteLine( "initial byte array" );
        Console.WriteLine( "------------------" );
        Console.WriteLine( BitConverter.ToString( byteArray ) );
        Console.WriteLine( );
        Console.WriteLine( formatter, "index", "array elements", "char" );
        Console.WriteLine( formatter, "-----", "--------------", "----" );
          
        // Convert byte array elements to char values.
        BAToChar( byteArray, 0 );
        BAToChar( byteArray, 1 );
        BAToChar( byteArray, 3 );
        BAToChar( byteArray, 5 );
        BAToChar( byteArray, 7 );
        BAToChar( byteArray, 9 );
        BAToChar( byteArray, 11 );
        BAToChar( byteArray, 13 );
        BAToChar( byteArray, 15 );
    }
}

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

initial byte array
------------------
20-00-00-2A-00-41-00-7D-00-C5-00-A8-03-29-04-AC-20

index   array elements    char
-----   --------------    ----
    0            20-00
    1            00-00
    3            2A-00       *
    5            41-00       A
    7            7D-00       }
    9            C5-00       Å
   11            A8-03       ?
   13            29-04       ?
   15            AC-20       ?
*/
' Example of the BitConverter.ToChar method.
Imports System
Imports Microsoft.VisualBasic

Module BytesToCharDemo

    Const formatter As String = "{0,5}{1,17}{2,8}"
 
    ' Convert two Byte array elements to a Char and display it.
    Sub BAToChar( bytes( ) As Byte, index As Integer )

        Dim value As Char = BitConverter.ToChar( bytes, index )

        Console.WriteLine( formatter, index, _
            BitConverter.ToString( bytes, index, 2 ), value )
    End Sub 
       
    Sub Main( )

        Dim byteArray as Byte( ) = { _
             32,   0,   0,  42,   0,  65,   0, 125,   0, 197, _
              0, 168,   3,  41,   4, 172,  32 }

        Console.WriteLine( _
            "This example of the BitConverter.ToChar( Byte( ), " & _
            "Integer ) " & vbCrLf & "method generates the " & _
            "following output. It converts elements " & vbCrLf & _
            "of a Byte array to Char values." & vbCrLf )
        Console.WriteLine( "initial Byte array" )
        Console.WriteLine( "------------------" )
        Console.WriteLine( BitConverter.ToString( byteArray ) )
        Console.WriteLine( )
        Console.WriteLine( formatter, "index", "array elements", "Char" )
        Console.WriteLine( formatter, "-----", "--------------", "----" )
          
        ' Convert Byte array elements to Char values.
        BAToChar( byteArray, 0 )
        BAToChar( byteArray, 1 )
        BAToChar( byteArray, 3 )
        BAToChar( byteArray, 5 )
        BAToChar( byteArray, 7 )
        BAToChar( byteArray, 9 )
        BAToChar( byteArray, 11 )
        BAToChar( byteArray, 13 )
        BAToChar( byteArray, 15 )
    End Sub 
End Module

' This example of the BitConverter.ToChar( Byte( ), Integer )
' method generates the following output. It converts elements 
' of a Byte array to Char values.
' 
' initial Byte array
' ------------------
' 20-00-00-2A-00-41-00-7D-00-C5-00-A8-03-29-04-AC-20
' 
' index   array elements    Char
' -----   --------------    ----
'     0            20-00
'     1            00-00
'     3            2A-00       *
'     5            41-00       A
'     7            7D-00       }
'     9            C5-00       Å
'    11            A8-03       ?
'    13            29-04       ?
'    15            AC-20       ?

注解

ToChar方法将字节转换从索引startIndexstartIndex+ 1 到Char值。The ToChar method converts the bytes from index startIndex to startIndex + 1 to a Char 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

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