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Uri.FromHex Method

Gets the decimal value of a hexadecimal digit.

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

public static int FromHex(
	char digit
)

Parameters

digit
Type: System.Char
The hexadecimal digit (0-9, a-f, A-F) to convert.

Return Value

Type: System.Int32
An Int32 value that contains a number from 0 to 15 that corresponds to the specified hexadecimal digit.

ExceptionCondition
ArgumentException

digit is not a valid hexadecimal digit (0-9, a-f, A-F).

The FromHex method converts a character representing a hexadecimal digit (0-9, a-f, A-F) to its decimal value (0 to 15). If digit is not a valid hexadecimal digit, an ArgumentException exception is thrown.

The following example determines whether a character is a hexadecimal character and, if it is, writes the corresponding decimal value to the console.


char  testChar = 'e';
if (Uri.IsHexDigit(testChar) == true)
    Console.WriteLine("'{0}' is the hexadecimal representation of {1}", testChar, Uri.FromHex(testChar));
else 
    Console.WriteLine("'{0}' is not a hexadecimal character", testChar);

string returnString = Uri.HexEscape(testChar);
Console.WriteLine("The hexadecimal value of '{0}' is {1}", testChar, returnString);


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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