C#

C#

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Mac address regex C#
Mac address
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GUID regex C#

GUID regex C#

GUID is an acronym for Globally Unique Identifier and used for resource identification. The term is generally used instead of UUID when working with Microsoft technologies.

JavaScript
JavaScript
Python
Python
Java
Java
C#
C#
PHP
PHP

GUID regex

Below is a simple regular expression to match a guide in a given string:

new Regex("^(?:\\{{0,1}(?:[0-9a-fA-F]){8}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){12}\\}{0,1})$")

Test it!
/^(?:\{{0,1}(?:[0-9a-fA-F]){8}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){12}\}{0,1})$/

True

False

Enter a text in the input above to see the result

Example code in C#:

using System.Text.RegularExpressions;
using System.Linq;
using System;
                    
public class Program
{
    public static void Main()
    {
        // Validate GUID
        Regex validateGuidRegex = new Regex("^(?:\\{{0,1}(?:[0-9a-fA-F]){8}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){12}\\}{0,1})$");
        Console.WriteLine(validateGuidRegex.IsMatch("{51d52cf1-83c9-4f02-b117-703ecb728b74}"));  // prints True
        
        // Extract GUID from a string
        Regex extractGuidRegex = new Regex("(?:\\{{0,1}(?:[0-9a-fA-F]){8}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){4}-(?:[0-9a-fA-F]){12}\\}{0,1})");
        string [] extracted = extractGuidRegex.Matches("Resource {51d52cf1-83c9-4f02-b117-703ecb728b74} is down")
            .Cast()
            .Select(m => m.Value) 
            .ToArray(); 
        Console.WriteLine(String.Join(",", extracted)); // prints {51d52cf1-83c9-4f02-b117-703ecb728b74}
    }
}

Test it!

True

False

Enter a text in the input above to see the result

Test it!

True

False

Enter a text in the input above to see the result