Asp.net Regular Expression example

Using system. Text. regularexpressions; // regular

string strHtml = " </ul> <div id=\"photo-tags\"> 

<ul id='tags'> 
<li> <a href='/user/669345/tags/Belgium'>Belgium </a> </li> 
<li> <a href='/user/669345/tags/Belgien'>Belgien </a> </li> 
<li> <a href='/user/669345/tags/Urlaub'>Urlaub </a> </li> 
<li> <a href='/user/669345/tags/Holidays'>Holidays </a> </li> 
<li> <a href='/user/669345/tags/Vakanties'>Vakanties </a> </li> 
<li> <a href='/user/669345/tags/CenterParcs'>CenterParcs </a> </li>
<li> <a href='/user/669345/tags/10 000 000'>10 000 000 </a> </li>
</ul> </div> <div id=\"photo-info\">";
      TextBox1.Text = "" + strHtml + "";      Regex re = new Regex("(?<=<li> <a href='/user/[^>]*/tags/[^>]*>).*?(?= </a> </li>)");      if (re.IsMatch(strHtml))      {          MatchCollection mc = re.Matches(strHtml);          foreach (Match ma in mc)          {              for (int i = 0; i < ma.Groups.Count; i++)              {                  TextBox2.Text += ma.Groups[i].Value + " ";              }              TextBox2.Text += "\n";          }      }      else      {          TextBox2.Text = "no";      }
 
 
Result:
Belgium
 
Belgien
Urlaub
Holidays
Vakanties
Centerparcs
10 000 000
 
 
 
/// <Summary>

/// Obtain the first image from the content of the article as a thumbnail of the article

/// </Summary>

/// <Param name = "articlecontent"> </param>

/// <Returns> </returns>

Public static string getimageurlfromarticle (string articlecontent)

{

RegEx r = new RegEx (@ "] + src = \ s *(? :'(? <SRC> [^ '] +)' | ""(? <SRC> [^ ""] +) "" | (? <SRC> [^> \ s] +) \ s * [^>] *> ", regexoptions. ignorecase );

Matchcollection MC = R. Matches (articlecontent );

If (MC. Count! = 0)

{

Return Mc [0]. Groups ["src"]. value. tolower ();

}

Else

{

Return "";

}

}