BitConverter.ToChar 方法

參考

定義

命名空間:: System

組件:: System.Runtime.Extensions.dll

組件:: System.Runtime.dll

組件:: mscorlib.dll

組件:: netstandard.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

多載

ToChar(Byte[], Int32)	傳回從位元組陣列中指定位置的兩個位元組所轉換的 Unicode 字元。
ToChar(ReadOnlySpan<Byte>)	將唯讀位元組範圍轉換為字元。

ToChar(Byte[], Int32)

來源:: BitConverter.cs

來源:: BitConverter.cs

來源:: BitConverter.cs

傳回從位元組陣列中指定位置的兩個位元組所轉換的 Unicode 字元。

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

參數

value: Byte[]

陣列，包含要轉換的兩個字節。

startIndex: Int32

開始位置在 value 內。

傳回

Char

開頭為兩個字節 startIndex的字元。

例外狀況

ArgumentException

startIndex 等於 value 的長度減去 1。

ArgumentNullException

value 為 null。

ArgumentOutOfRangeException

startIndex 小於零或大於 value 的長度減去 1。

範例

下列程式代碼範例會使用方法，將數位列的Char項目Byte轉換成 unicode 字元 (值) ToChar。

// 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          Å
   11            A8-03          Ψ
   13            29-04          Щ
   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       Ψ
   13            29-04       Щ
   15            AC-20       €
*/

open System

let print obj1 obj2 obj3 = printfn $"{obj1,5}{obj2,17}{obj3,8}"

// Convert two byte array elements to a char and display it.
let BAToChar bytes index =
    let value = BitConverter.ToChar(bytes, index)

    print index (BitConverter.ToString(bytes, index, 2)) value

let byteArray = 
    [| 32uy; 0uy; 0uy; 42uy; 0uy; 65uy; 0uy; 125uy; 0uy
       197uy; 0uy; 168uy; 3uy; 41uy; 4uy; 172uy; 32uy |]

printfn "This example of the BitConverter.ToChar(byte [], int) \nmethod generates the following output. It converts \nelements of a byte array to char values.\n"
printfn "initial byte array"
printfn "------------------"
printfn $"{BitConverter.ToString byteArray}\n"

print "index" "array elements" "char"
print "-----" "--------------" "----"

// 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       Ψ
//    13            29-04       Щ
//    15            AC-20       €

' Example of the BitConverter.ToChar method.
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       Ψ
'    13            29-04       Щ
'    15            AC-20       €

備註

方法會將 ToChar 位元組從索引 startIndex 轉換成 startIndex + 1 轉換為 Char 值。陣列中的位元組順序必須反映計算機系統架構的結束時間。如需詳細資訊，請參閱類別主題的 BitConverter 一節。

另請參閱

GetBytes(Char)

適用於

ToChar(ReadOnlySpan<Byte>)

來源:: BitConverter.cs

來源:: BitConverter.cs

來源:: BitConverter.cs

將唯讀位元組範圍轉換為字元。

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

參數

value: ReadOnlySpan<Byte>

包含要轉換之位元組的唯讀範圍。

傳回

Char

代表已轉換之位元組的字元。

例外狀況

ArgumentOutOfRangeException

value 的長度小於 Char 的長度。

適用於

共用方式為

BitConverter.ToChar 方法

定義

多載

ToChar(Byte[], Int32)

參數

傳回

例外狀況

範例

備註

另請參閱

適用於

ToChar(ReadOnlySpan<Byte>)

參數

傳回

例外狀況

適用於

其他資源