BitConverter.ToUInt16 方法

定义

重载

ToUInt16(ReadOnlySpan<Byte>)

将只读字节范围转换为 16 位无符号整数。Converts a read-only byte-span into a 16-bit unsigned integer.

ToUInt16(Byte[], Int32)

返回由字节数组中指定位置的两个字节转换来的 16 位无符号整数。Returns a 16-bit unsigned integer converted from two bytes at a specified position in a byte array.

ToUInt16(ReadOnlySpan<Byte>)

重要

此 API 不符合 CLS。

将只读字节范围转换为 16 位无符号整数。Converts a read-only byte-span into a 16-bit unsigned integer.

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

参数

value
ReadOnlySpan<Byte>

包含要转换的字节的只读范围。A read-only span containing the bytes to convert.

返回

UInt16

表示已转换字节的 16 位无符号整数。An 16-bit unsigned integer representing the converted bytes.

属性

例外

value 的长度小于 2。The length of value is less than the 2.

ToUInt16(Byte[], Int32)

重要

此 API 不符合 CLS。

返回由字节数组中指定位置的两个字节转换来的 16 位无符号整数。Returns a 16-bit unsigned integer converted from two bytes at a specified position in a byte array.

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

参数

value
Byte[]

字节数组。The array of bytes.

startIndex
Int32

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

返回

UInt16

由两个字节构成、从 startIndex 开始的 16 位无符号整数。A 16-bit unsigned integer formed by two bytes beginning at startIndex.

属性

例外

startIndex 等于 value 减 1 的长度。startIndex equals the length of value minus 1.

valuenullvalue is null.

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

示例

下面的代码示例 Byte 通过方法将数组元素转换为 UInt16ToUInt16The following code example converts elements of Byte arrays to UInt16 values with the ToUInt16 method.

// 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
*/
' 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

注解

ToUInt16方法将索引中的字节转换 startIndexstartIndex + 1 UInt16The ToUInt16 method converts the bytes from index startIndex to startIndex + 1 to a UInt16 value. 数组中的字节顺序必须反映计算机系统体系结构的字节排序。有关详细信息,请参阅类主题的 "备注" 部分 BitConverterThe 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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