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Categories / C# Tutorial / Regular Expression

 

Match a phone number

using System; using System.Text.RegularExpressions;   class Class1   {     [STAThread]     static void Main(string[] args)     {         Regex phoneExp = new Regex( @"^\(\d{3}\)\s\d{3}-\d{4}$" );           string input;             Console.Write( "Enter a phone number: " );             input = Console.ReadLine();                          while( phoneExp.Match( input ).Success == false )             {                 Console.WriteLine( "Invalid input. Try again." );                 Console.Write( "Enter a phone number: " );                 input = Console.ReadLine();             }             Console.WriteLine( "Validated!" );     }   }