Uri.IsHexEncoding Method (String, Int32)

 

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");

.NET Framework
Available since 1.1
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