Mega Code Archive
Get Area Code by using Regular expression
<![CDATA[
///////////////////////////////////////////////////////////////////////////////////////////////
//
// This File is Part of the CallButler Open Source PBX (http://www.codeplex.com/callbutler
//
// Copyright (c) 2005-2008, Jim Heising
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
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//
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation and/or
// other materials provided with the distribution.
//
// * Neither the name of Jim Heising nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific prior
// written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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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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