Extract images link from html text string

I want to extract all images link to so I can utilize all images freely. how to do in asp.net c#

<div>
    <img src="/upload/Tom_Cruise-242x300.jpg" alt="Tom_Cruise-242x300.jpg" align="left" border="0" height="300" width="242">
    sample text sample text sample text sample text 
    <img src="http://www.sharicons.com/images/rss_icon.jpg" alt="Icon" align="left" border="0" height="100" width="100">
    sample text sample text sample text sample text sample text sample text sample text sample text</div>

I Got the Solutions

 string ProcessedText = Regex.Replace(sb.ToString(开发者_运维百科), "^<img[^>]*>", string.Empty);

You can use the HTML Agility Pack to parse the HTML and query it using XPath syntax (like XmlDocument).

I would use the HTML Agility Pack.
Then you can do something like this:

HtmlNodeCollection allImages = doc.DocumentNode.SelectNodes("//img[@src]");

One easy way to do this is to put the string into a string called myString, then run the following code:

List<string> imagePaths = new List<string>();
while( myString.IndexOf("img src=") >= 0 ){
  myString = myString.Substring( myString.IndexOf("img src=")+9);
  imagePaths.Add(myString.Substring(0,myString.IndexOf("\"")));
}

The List imagePaths will now contain all the image links.

You can use HTMLAgilityPack or your second option is regular expressions :)