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BitConverter.ToUInt16 方法

定義

多載

ToUInt16(ReadOnlySpan<Byte>)

將唯讀位元組範圍轉換為 16 位元不帶正負號的整數。

ToUInt16(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 16 位元不帶正負號的整數 (Unsigned Integer)。

ToUInt16(ReadOnlySpan<Byte>)

來源:
BitConverter.cs
來源:
BitConverter.cs
來源:
BitConverter.cs

重要

此 API 不符合 CLS 規範。

將唯讀位元組範圍轉換為 16 位元不帶正負號的整數。

public:
 static System::UInt16 ToUInt16(ReadOnlySpan<System::Byte> value);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (ReadOnlySpan<byte> value);
[<System.CLSCompliant(false)>]
static member ToUInt16 : ReadOnlySpan<byte> -> uint16
Public Shared Function ToUInt16 (value As ReadOnlySpan(Of Byte)) As UShort

參數

value
ReadOnlySpan<Byte>

包含要轉換之位元組的唯讀範圍。

傳回

16 位元不帶正負號的整數,代表已轉換的位元組。

屬性

例外狀況

value 的長度小於 2。

適用於

ToUInt16(Byte[], Int32)

來源:
BitConverter.cs
來源:
BitConverter.cs
來源:
BitConverter.cs

重要

此 API 不符合 CLS 規範。

傳回從位元組陣列中指定位置的兩個位元組所轉換的 16 位元不帶正負號的整數 (Unsigned Integer)。

public:
 static System::UInt16 ToUInt16(cli::array <System::Byte> ^ value, int startIndex);
[System.CLSCompliant(false)]
public static ushort ToUInt16 (byte[] value, int startIndex);
[<System.CLSCompliant(false)>]
static member ToUInt16 : byte[] * int -> uint16
Public Shared Function ToUInt16 (value As Byte(), startIndex As Integer) As UShort

參數

value
Byte[]

包含要轉換之兩個位元組的位元組陣列。

startIndex
Int32

開始位置在 value 內。

傳回

由兩個位元組所形成的 16 位元不帶正負號的整數開始於 startIndex

屬性

例外狀況

startIndex 等於 value 的長度減去 1。

valuenull

startIndex 小於零或大於 value 的長度減去 1。

範例

下列程式碼範例會使用 ToUInt16 方法,將陣列的專案 Byte 轉換為 UInt16 值。

// Example of the BitConverter::ToUInt16 method.
using namespace System;

// Convert two byte array elements to an unsigned short and display it.
void BAToUInt16( array<unsigned char>^bytes, int index )
{
   unsigned short value = BitConverter::ToUInt16( bytes, index );
   Console::WriteLine( "{0,5}{1,17}{2,16}", index, BitConverter::ToString( bytes, index, 2 ), value );
}

int main()
{
   array<unsigned char>^byteArray = {15,0,0,255,3,16,39,255,255,127};
   Console::WriteLine( "This example of the BitConverter::ToUInt16( unsigned "
   "char[ ], int ) \nmethod generates the following output. It "
   "converts elements of a \nbyte array to unsigned short "
   "values.\n" );
   Console::WriteLine( "initial byte array" );
   Console::WriteLine( "------------------" );
   Console::WriteLine( BitConverter::ToString( byteArray ) );
   Console::WriteLine();
   Console::WriteLine( "{0,5}{1,17}{2,16}", "index", "array elements", "unsigned short" );
   Console::WriteLine( "{0,5}{1,17}{2,16}", "-----", "--------------", "--------------" );
   
   // Convert byte array elements to unsigned short values.
   BAToUInt16( byteArray, 1 );
   BAToUInt16( byteArray, 0 );
   BAToUInt16( byteArray, 3 );
   BAToUInt16( byteArray, 5 );
   BAToUInt16( byteArray, 8 );
   BAToUInt16( byteArray, 7 );
}

/*
This example of the BitConverter::ToUInt16( unsigned char[ ], int )
method generates the following output. It converts elements of a
byte array to unsigned short values.

initial byte array
------------------
0F-00-00-FF-03-10-27-FF-FF-7F

index   array elements  unsigned short
-----   --------------  --------------
    1            00-00               0
    0            0F-00              15
    3            FF-03            1023
    5            10-27           10000
    8            FF-7F           32767
    7            FF-FF           65535
*/
// Example of the BitConverter.ToUInt16 method.
using System;

class BytesToUInt16Demo
{
    const string formatter = "{0,5}{1,17}{2,10}";

    // Convert two byte array elements to a ushort and display it.
    public static void BAToUInt16( byte[ ] bytes, int index )
    {
        ushort value = BitConverter.ToUInt16( bytes, index );

        Console.WriteLine( formatter, index,
            BitConverter.ToString( bytes, index, 2 ), value );
    }

    public static void Main( )
    {
        byte[] byteArray = {
            15, 0, 0, 255, 3, 16, 39, 255, 255, 127 };

        Console.WriteLine(
            "This example of the BitConverter.ToUInt16( byte[ ], " +
            "int ) \nmethod generates the following output. It " +
            "converts elements \nof a byte array to ushort values.\n" );
        Console.WriteLine( "initial byte array" );
        Console.WriteLine( "------------------" );
        Console.WriteLine( BitConverter.ToString( byteArray ) );
        Console.WriteLine( );
        Console.WriteLine( formatter, "index", "array elements",
            "ushort" );
        Console.WriteLine( formatter, "-----", "--------------",
            "------" );

        // Convert byte array elements to ushort values.
        BAToUInt16( byteArray, 1 );
        BAToUInt16( byteArray, 0 );
        BAToUInt16( byteArray, 3 );
        BAToUInt16( byteArray, 5 );
        BAToUInt16( byteArray, 8 );
        BAToUInt16( byteArray, 7 );
    }
}

/*
This example of the BitConverter.ToUInt16( byte[ ], int )
method generates the following output. It converts elements
of a byte array to ushort values.

initial byte array
------------------
0F-00-00-FF-03-10-27-FF-FF-7F

index   array elements    ushort
-----   --------------    ------
    1            00-00         0
    0            0F-00        15
    3            FF-03      1023
    5            10-27     10000
    8            FF-7F     32767
    7            FF-FF     65535
*/
open System

let print obj1 obj2 obj3 = printfn $"{obj1,5}{obj2,17}{obj3,10}"

// Convert two byte array elements to a ushort and display it.
let BAToUInt16 bytes index =
    let value = BitConverter.ToUInt16(bytes, index)

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

let byteArray =
    [| 15uy; 0uy; 0uy; 255uy; 3uy; 16uy; 39uy; 255uy; 255uy; 127uy |]

printfn "This example of the BitConverter.ToUInt16(byte [], int) \nmethod generates the following output. It converts elements \nof a byte array to ushort values.\n"
printfn "initial byte array"
printfn "------------------"
printfn $"{BitConverter.ToString byteArray}\n"
print "index" "array elements" "ushort"
print "-----" "--------------" "------"

// Convert byte array elements to ushort values.
BAToUInt16 byteArray 1
BAToUInt16 byteArray 0
BAToUInt16 byteArray 3
BAToUInt16 byteArray 5
BAToUInt16 byteArray 8
BAToUInt16 byteArray 7


// This example of the BitConverter.ToUInt16(byte [], int)
// method generates the following output. It converts elements
// of a byte array to ushort values.
//
// initial byte array
// ------------------
// 0F-00-00-FF-03-10-27-FF-FF-7F
//
// index   array elements    ushort
// -----   --------------    ------
//     1            00-00         0
//     0            0F-00        15
//     3            FF-03      1023
//     5            10-27     10000
//     8            FF-7F     32767
//     7            FF-FF     65535
' Example of the BitConverter.ToUInt16 method.
Module BytesToUInt16Demo

    Const formatter As String = "{0,5}{1,17}{2,10}"
 
    ' Convert two Byte array elements to a UInt16 and display it.
    Sub BAToUInt16( bytes( ) As Byte, index As Integer )

        Dim value As UInt16 = BitConverter.ToUInt16( bytes, index )

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

        Dim byteArray as Byte( ) = { _
             15, 0, 0, 255, 3, 16, 39, 255, 255, 127 }

        Console.WriteLine( _
            "This example of the BitConverter.ToUInt16( Byte( ), " & _
            "Integer ) " & vbCrLf & "method generates the " & _
            "following output. It converts elements " & vbCrLf & _
            "of a Byte array to UInt16 values." & vbCrLf )
        Console.WriteLine( "initial Byte array" )
        Console.WriteLine( "------------------" )
        Console.WriteLine( BitConverter.ToString( byteArray ) )
        Console.WriteLine( )
        Console.WriteLine( formatter, "index", "array elements", _
            "UInt16" )
        Console.WriteLine( formatter, "-----", "--------------", _
            "------" )
          
        ' Convert Byte array elements to UInt16 values.
        BAToUInt16( byteArray, 1 )
        BAToUInt16( byteArray, 0 )
        BAToUInt16( byteArray, 3 )
        BAToUInt16( byteArray, 5 )
        BAToUInt16( byteArray, 8 )
        BAToUInt16( byteArray, 7 )
    End Sub 
End Module

' This example of the BitConverter.ToUInt16( Byte( ), Integer )
' method generates the following output. It converts elements
' of a Byte array to UInt16 values.
' 
' initial Byte array
' ------------------
' 0F-00-00-FF-03-10-27-FF-FF-7F
' 
' index   array elements    UInt16
' -----   --------------    ------
'     1            00-00         0
'     0            0F-00        15
'     3            FF-03      1023
'     5            10-27     10000
'     8            FF-7F     32767
'     7            FF-FF     65535

備註

方法 ToUInt16 會將位元組從索引 startIndex 轉換成 startIndex + 1 轉換為 UInt16 值。 陣列中的位元組順序必須反映電腦系統架構的結束度。 如需詳細資訊,請參閱 類別主題的 BitConverter 一節。

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適用於