Get Area Code by using Regular expression
///////////////////////////////////////////////////////////////////////////////////////////////
//
// This File is Part of the CallButler Open Source PBX (http://www.codeplex.com/callbutler
//
// Copyright (c) 2005-2008, Jim Heising
// All rights reserved.
//
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// are permitted provided that the following conditions are met:
//
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//
// * Neither the name of Jim Heising nor the names of its contributors may be
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// written permission.
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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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