How to get current domain name in ASP.NET

Question

I want to get the current domain name in asp.net c#.

I am using this code.

string DomainName = HttpContext.Current.Request.Url.Host; 

My URL is localhost:5858but it's returning only localhost.

Now, I am using my project in localhost. I want to get localhost:5858.

For another example, when I am using this domain

www.somedomainname.com 

I want to get somedomainname.com

Please give me an idea how to get the current domain name.

Answer 1

Try getting the “left part” of the url, like this:

string domainName = HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Authority); 

This will give you either http://localhost:5858 or https://www.somedomainname.com whether you're on local or production. If you want to drop the www part, you should configure IIS to do so, but that's another topic.

Do note that the resulting URL will not have a trailing slash.