Pattern matching in C# with Regex

A regular expression is a pattern that could be matched against an input text. A pattern consists of one or more character literals, operators, or constructs.

Let us see an example to display the words starting with the letter ‘M’ using Regex.

Example

 Live Demo

using System;
using System.Text.RegularExpressions;

namespace Demo {
   class Program {
      private static void showMatch(string text, string expr) {
         Console.WriteLine("The Expression: " + expr);
         MatchCollection mc = Regex.Matches(text, expr);
         foreach (Match m in mc) {
            Console.WriteLine(m);
         }
      }

      static void Main(string[] args) {
         string str = "Mandatory requirements for a Cricket Match Event!";

         Console.WriteLine("Matching words that start with 'M': ");
         showMatch(str, @"\bM\S*");
         Console.ReadKey();
      }
   }
}

Output

Matching words that start with 'M':
The Expression: \bM\S*
Mandatory
Match

Above, I have the string.

string str = "Mandatory requirements for a Cricket Match Event!";

To get all the words that begin with ‘M’, I have used the following pattern −

@"\bM\S*

Arjun Thakur

Published on 20-Aug-2018 09:30:41

• Related Questions & Answers
• Pattern matching in Python with Regex
• Wildcard Pattern Matching
• What is Pattern Matching in C# 7.0?
• Unix filename pattern matching in Python
• Matching Nonprintable Characters using Java regex
• Lua pattern matching vs regular expression
• Unix filename pattern matching in Python (fnmatch)
• Which package is used for pattern matching with regular expressions in java?
• Print all words matching a pattern in CamelCase Notation Dictionary in C++
• Methods of the Pattern class in Java Regex
• Program to check regular expression pattern is matching with string or not in Python
• Matching strings with a wildcard in C#
• How to return all matching strings against a RegEx in JavaScript?
• Pattern pattern() method in Java with examples
• Camelcase Matching in C++