Get Area Code by using Regular expression : Match « Regular Expressions « C# / C Sharp






Get Area Code by using Regular expression

   

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//
//    This File is Part of the CallButler Open Source PBX (http://www.codeplex.com/callbutler
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using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
using System.Windows.Forms;
using System.Xml;

namespace WOSI.Utilities
{
    public class StringUtils
    {
        public static string GetAreaCode(string inputString)
        {
            //string outputNumber = "";
            string numberString = "";

            // Get number count
            int numberCount = 0;

            foreach (Char numberChar in inputString)
            {
                if (Char.IsNumber(numberChar))
                {
                    numberCount++;
                    numberString += numberChar.ToString();
                }
            }

            if (Regex.IsMatch(inputString, @"(?<First>2[0-4]\d|25[0-5]|[01]?\d\d?)\.(?<Second>2[0-4]\d|25[0-5]|[01]?\d\d?)\.(?<Third>2[0-4]\d|25[0-5]|[01]?\d\d?)\.(?<Fourth>2[0-4]\d|25[0-5]|[01]?\d\d?)"))
            {
                return "";
            }
            else if (numberCount == 7)
            {
                return "";
            }
            else if (numberCount == 10)
            {
                return numberString.Substring(0, 3);
            }
            else if (numberCount == 11)
            {
                return numberString.Substring(1, 3);
            }

            return "";
        }
   }
}

   
    
    
  








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