IsHexDigit Method

Uri.IsHexDigit Method

Determines whether a specified character is a valid hexadecimal digit.

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

public static bool IsHexDigit(
	char character


Type: System.Char

The character to validate.

Return Value

Type: System.Boolean
A Boolean value that is true if the character is a valid hexadecimal digit; otherwise false.

Hexadecimal digits are the digits 0 to 9 and the letters A-F or a-f.

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

String* returnString = Uri::HexEscape(testChar);
Console::WriteLine(S"The hexadecimal value of '{0}' is {1}", __box(testChar), returnString);

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

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

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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