C# | Uri.IsHexEncoding() Method
Uri.IsHexEncoding(String, Int32) Method is used to check whether a character in a string is hexadecimal encoded or not. This checks for hexadecimal encoding which follows the pattern “%hexhex” in a string, where “hex” is a digit from 0 to 9 or a letter from A-F (case-insensitive).
Syntax: public static bool IsHexEncoding (string pattern, int index);
Parameters:
pattern: It is the string to check.
index: It is the location in pattern to check for hexadecimal encoding.Return Value: This method returns a Boolean value that is true if pattern is hexadecimal encoded at the specified location otherwise, false.
Below programs illustrate the use of Uri.IsHexEncoding(String, Int32) Method:
Example 1:
// C# program to demonstrate the // Uri.IsHexEncoding(String, // Int32) Method using System; using System.Globalization; class GFG { // Main Method public static void Main() { // Declaring and initializing pattern string pattern = "%75" ; // Declaring and initializing index int index = 1; // Validating the Character in the String // using IsHexEncoding(String, Int32) method bool value = Uri.IsHexEncoding(pattern, index); // Displaying the result if (value) Console.WriteLine( "{0}({1}) is a valid " + "Hexadecimal Encoded" , pattern); else Console.WriteLine( "{0} is a valid" + " Hexadecimal Encoded" , pattern); } } |
Output:
%75 is a valid Hexadecimal Encoded
Example 2:
// C# program to demonstrate the // Uri.IsHexEncoding(String, // Int32) Method using System; using System.Globalization; class GFG { // Main Method public static void Main() { // calling get() method get ( "%65" , 1); get ( "%75" , 0); get ( "%55" , 0); } // defining get() method public static void get ( string pattern, int index) { // Validating the Character in the String // using IsHexEncoding(String, Int32) method bool value = Uri.IsHexEncoding(pattern, index); // Displaying the result if (value) Console.WriteLine( "{0} is a valid" + " Hexadecimal Encoded" , pattern); else Console.WriteLine( "{0} is a not valid" + " Hexadecimal Encoded" , pattern); } } |
Output:
%65 is a not valid Hexadecimal Encoded %75 is a valid Hexadecimal Encoded %55 is a valid Hexadecimal Encoded
Reference:
- https://docs.microsoft.com/en-us/dotnet/api/system.uri.ishexencoding?view=netstandard-2.1
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