IsHexEncoding Method

Uri.IsHexEncoding Method

Determines whether a character in a string is hexadecimal encoded.

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

public static bool IsHexEncoding(
	string pattern,
	int index
)

Parameters

pattern
Type: System.String

The string to check.

index
Type: System.Int32

The location in pattern to check for hexadecimal encoding.

Return Value

Type: System.Boolean
A Boolean value that is true if pattern is hexadecimal encoded at the specified location; otherwise, false.

The IsHexEncoding method checks for hexadecimal encoding that follows the pattern "%hexhex" in a string, where "hex" is a digit from 0 to 9 or a letter from A-F (case-insensitive).

The following code example determines whether a character is hexadecimal encoded and, if so, writes the equivalent character to the console.

string testString = "%75";
int index = 0;
if (Uri.IsHexEncoding(testString, index))
     Console.WriteLine("The character is {0}", Uri.HexUnescape(testString, ref index));
else
     Console.WriteLine("The character is not hexadecimal encoded");
String* testString = S"%75";
int index = 0;
if (Uri::IsHexEncoding(testString, 0))
    Console::WriteLine(S"The character is {0}", __box(Uri::HexUnescape(testString, &index)));
else
    Console::WriteLine(S"The character is not hex encoded");

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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