C# | Uri.FromHex() Method

Uri.FromHex(Char) Method is used to get the decimal value of a hexadecimal digit.

Syntax: public static int FromHex (char digit);
Here, it takes the hexadecimal digit (0-9, a-f, A-F) to convert.

Return Value: This method returns an Int32 value that contains a number from 0 to 15 that corresponds to the specified hexadecimal digit.

Exception: This method throws ArgumentException if the digit is not a valid hexadecimal digit (0-9, a-f, A-F).

Below programs illustrate the use of Uri.FromHex(Char) Method:

Example 1:

 `// C# program to demonstrate the ` `// Uri.FromHex(Char) Method ` `using` `System; ` `using` `System.Globalization; ` ` `  `class` `GFG { ` ` `  `    ``// Main Method ` `    ``public` `static` `void` `Main() ` `    ``{ ` `        ``// Declaring and initializing Char value ` `        ``char` `value = ``'A'``; ` ` `  `        ``// Gets the decimal value  ` `        ``// of a hexadecimal digit. ` `        ``// using FromHex() method ` `        ``int` `dec = Uri.FromHex(value); ` ` `  `        ``// Displaying the result ` `        ``Console.WriteLine(``"Converted int value : {0}"``, dec); ` `    ``} ` `} `

Output:

```Converted int value : 10
```

Example 2: For ArgumentException

 `// C# program to demonstrate the ` `// Uri.FromHex(Char) Method ` `using` `System; ` `using` `System.Globalization; ` ` `  `class` `GFG { ` ` `  `    ``// Main Method ` `    ``public` `static` `void` `Main() ` `    ``{ ` `        ``try` `{ ` ` `  `            ``// Declaring and initializing ` `            ``// Char value ` `            ``char` `value = ``'.'``; ` ` `  `            ``// Gets the decimal value  ` `            ``// of a hexadecimal digit. ` `            ``// using FromHex() method ` `            ``int` `dec = Uri.FromHex(value); ` ` `  `            ``// Displaying the result ` `            ``Console.WriteLine(``"Converted int value : {0}"``, dec); ` `        ``} ` ` `  `        ``catch` `(ArgumentException e)  ` `        ``{ ` `            ``Console.WriteLine(``"Digit should be a valid "``+ ` `                   ``"Hexadecimal digit (0-9, a-f, A-F)."``); ` `            ``Console.Write(``"Exception Thrown: "``); ` `            ``Console.Write(``"{0}"``, e.GetType(), e.Message); ` `        ``} ` `    ``} ` `} `

Output:

```Digit should be a valid Hexadecimal digit (0-9, a-f, A-F).
Exception Thrown: System.ArgumentException
```

Reference:

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