BitConverter.ToUInt16 方法
定義
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
| 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>)
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> -> uint16Public 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)
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 -> uint16Public 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。
value 為 null。
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
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