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BitConverter.ToUInt16 Method

Returns a 16-bit unsigned integer converted from two bytes at a specified position in a byte array.

This method is not CLS-compliant.  

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

[CLSCompliantAttribute(false)] 
public static ushort ToUInt16 (
	byte[] value,
	int startIndex
)
/** @attribute CLSCompliantAttribute(false) */ 
public static UInt16 ToUInt16 (
	byte[] value, 
	int startIndex
)
CLSCompliantAttribute(false) 
public static function ToUInt16 (
	value : byte[], 
	startIndex : int
) : ushort
Not applicable.

Parameters

value

The array of bytes.

startIndex

The starting position within value.

Return Value

A 16-bit unsigned integer formed by two bytes beginning at startIndex.

Exception typeCondition

ArgumentException

startIndex equals the length of value minus 1.

ArgumentNullException

value is a null reference (Nothing in Visual Basic).

ArgumentOutOfRangeException

startIndex is less than zero or greater than the length of value minus 1.

The following code example converts elements of Byte arrays to UInt16 values with the ToUInt16 method.

// 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.
import System.*;

class BytesToUInt16Demo
{
    private static String formatter = "{0,5}{1,17}{2,10}";

    // Convert two byte array elements to a ushort and display it.
    public static void BAToUInt16(ubyte bytes[], int index)
    {
        UInt16 value = BitConverter.ToUInt16(bytes, index);
        Console.WriteLine(formatter, (Int32)index, 
            BitConverter.ToString(bytes, index, 2), (UInt16)value);
    } //BAToUInt16

    public static void main(String[] args)
    {
        ubyte byteArray[] =  { 15, 0, 0, 255, 3, 16, 39, 255, 255, 127 };

        Console.WriteLine("This example of the "
            + "BitConverter.ToUInt16( byte[ ], int ) \n"
            + "method 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);
    } //main
} //BytesToUInt16Demo

/*
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
*/

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0

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