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. without having to hardcode it in my web config)?

Answer 1

string baseUrl = Request.Url.GetLeftPart(UriPartial.Authority); 

Uri::GetLeftPart Method:

The GetLeftPart method returns a string containing the leftmost portion of the URI string, ending with the portion specified by part.

UriPartial Enumeration:

The scheme and authority segments of the URI.

Answer 2

For anyone still wondering, a more complete answer is available at http://devio.wordpress.com/2009/10/19/get-absolut-url-of-asp-net-application/.

public string FullyQualifiedApplicationPath {     get     {         //Return variable declaration         var appPath = string.Empty;          //Getting the current context of HTTP request         var context = HttpContext.Current;          //Checking the current context content         if (context != null)         {             //Formatting the fully qualified website url/name             appPath = string.Format("{0}://{1}{2}{3}",                                     context.Request.Url.Scheme,                                     context.Request.Url.Host,                                     context.Request.Url.Port == 80                                         ? string.Empty                                         : ":" + context.Request.Url.Port,                                     context.Request.ApplicationPath);         }          if (!appPath.EndsWith("/"))             appPath += "/";          return appPath;     } }