Posted By

jasonseney on 03/19/09

Tagged

regex url c strings

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Format URLs in string to HTML Links in C#

/ Published in: C#

Will return a string that has any matched URLs wrapped in <a> tags.

Example: "This is a link to http://foobar.com . Please visit !"

Becomes: "This is a link to <a href='http://foobar.com'>http://foobar.com</a> . Please visit!"

Note: Opens links in new window.

Credit for regex: Faraz Shah Khan

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public static string FormatUrls(string input) {
	string output = input;
	Regex regx = new Regex("http(s)?://([\\w+?\\.\\w+])+([a-zA-Z0-9\\~\\!\\@\\#\\$\\%\\^\\&amp;\\*\\(\\)_\\-\\=\\+\\\\\\/\\?\\.\\:\\;\\'\\,]*([a-zA-Z0-9\\?\\#\\=\\/]){1})?", RegexOptions.IgnoreCase);
 
	MatchCollection mactches = regx.Matches(output);
 
	foreach (Match match in mactches) {
		output = output.Replace(match.Value, "<a href='" + match.Value + "' target='blank'>" + match.Value + "</a>");
	}
	return output;
}

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Posted By: Vordreller on March 22, 2009

There is a small problem with this one.

Try inserting this:

This is a link to http://coalition.iforums.us/risca-vm2.html, please visit.

The comma sign will be considered part of the URL, while it is actually not.

Posted By: jasonseney on March 31, 2009

@Vordreller: Thanks for catching that, guess that's what I get for grabbing the regex from someone else :) I'll have to update that after I test a few similar situations.