C# code to extract Email

Hi,
In this post, i am going to provide the readers with sample code to Extract Email addresses from a given string and store them into an array.I will give the code as Method, so that you can easily import it into your application.This code can be easily used to extract Email Id’s from a webpage, just pass the HTML of the web page as the Text2Scrape

This Class uses String arrays to store results

using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;

namespace Coderbuddy
{
public class ExtractEmails
{
private string s;
public ExtractEmails(string Text2Scrape)
{
this.s = Text2Scrape;
}



 public string[] Extract_Emails()
{
string[] Email_List = new string[0];
Regex r = new Regex(@"[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,6}", RegexOptions.IgnoreCase);
Match m;
//Searching for the text that matches the above regular expression(which only matches email addresses)
for (m = r.Match(s); m.Success; m = m.NextMatch())
{
//This section here demonstartes Dynamic arrays
if (m.Value.Length > 0)
{
//Resize the array Email_List by incrementing it by 1, to save the next result
Array.Resize(ref Email_List, Email_List.Length + 1);
Email_List[Email_List.Length - 1] = m.Value;
}
}
return Email_List;
}
}
}

The following code snippet is the same as the above one, the only difference is that this method saves the Extracted Email Id’s to a string list instead of an array, I think the following code is more effective and easy to code

This class uses List to store results, and these list are converted into arrays just before they are returned as arrays

using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;

namespace Coderbuddy
{
public class ExtractEmailLists
{
private string s;
public ExtractEmailLists(string Text2Scrape)
{
this.s = Text2Scrape;
}



 public string[] Extract_Emails()
{
Regex r = new Regex(@"[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,6}", RegexOptions.IgnoreCase);
Match m;
List results = new List();
for (m = r.Match(s); m.Success; m = m.NextMatch())
{
if (!(results.Contains(m.Value)))
results.Add(m.Value);
}
return results.ToArray();
}
}
}

Please comment, if you have any doubts

CodeProject