How can I get the root domain URI in ASP.NET?

Question

Let\'s say I\'m hosting a website at http://www.foobar.com.

Is there a way I can programmatically ascertain \"http://www.foobar.com/\" in my code behind (i.e. witho

Answer 1

Match match = Regex.Match(host, "([^.]+\\.[^.]{1,3}(\\.[^.]{1,3})?)$");
string domain = match.Groups[1].Success ? match.Groups[1].Value : null;

host.com => return host.com
s.host.com => return host.com

host.co.uk => return host.co.uk
www.host.co.uk => return host.co.uk
s1.www.host.co.uk => return host.co.uk