What is the quickest way to get the absolute uri for the root of the app in asp.net?

Question

What is the simplest way to get: http://www.[Domain].com in asp.net?

There doesn't seem to be one method which can do this, the only way I know is to do some string acrobatics on server variables or Request.Url. Anyone?

Answer 1

System.Web.UI.Page.Request.Url

Answer 2

this.Request.Url.Host

Answer 3

You can use something like this.

System.Web.HttpContext.Current.Server.ResolveUrl("~/")

It maps to the root of the application. now if you are inside of a virtual directory you will need to do a bit more work.

Edit

Old posting contained incorrect method call!

Answer 4

You can do it like this:

string.Format("{0}://{1}:{2}", Request.Url.Scheme, Request.Url.Host, Request.Url.Port)

And you'll get the generic URI syntax <protocol>://<host>:<port>

Answer 5

I really like the way CMS handled this question the best, using the String.Format, and the Page.Request variables. I'd just like to tweak it slightly. I just tested it on one of my pages, so, i'll copy the code here:

String baseURL = string.Format(
   (Request.Url.Port != 80) ? "{0}://{1}:{2}" : "{0}://{1}", 
    Request.Url.Scheme, 
    Request.Url.Host, 
    Request.Url.Port)

Answer 6

This method handles http/https, port numbers and query strings.

'Returns current page URL 
Function fullurl() As String
    Dim strProtocol, strHost, strPort, strurl, strQueryString As String
    strProtocol = Request.ServerVariables("HTTPS")
    strPort = Request.ServerVariables("SERVER_PORT")
    strHost = Request.ServerVariables("SERVER_NAME")
    strurl = Request.ServerVariables("url")
    strQueryString = Request.ServerVariables("QUERY_STRING")

    If strProtocol = "off" Then
        strProtocol = "http://"
    Else
        strProtocol = "https://"
    End If

    If strPort <> "80" Then
        strPort = ":" & strPort
    Else
        strPort = ""
    End If

    If strQueryString.Length > 0 Then
        strQueryString = "?" & strQueryString
    End If

    Return strProtocol & strHost & strPort & strurl & strQueryString
End Function

Answer 7

I had to deal with something similar, I needed a way to programatically set the tag to point to my website root.

The accepted solution wasn't working for me because of localhost and virtual directories stuff.

So I came up with the following solution, it works on localhost with or without virtual directories and of course under IIS Websites.

string.Format("{0}://{1}:{2}{3}", Request.Url.Scheme, Request.Url.Host, Request.Url.Port, ResolveUrl("~")

Answer 8

Combining the best of what I've seen on this question so far, this one takes care of:

1. http and https
2. standard ports (80, 443) and non standard

3. application hosted in a sub-folder of the root

   string url = String.Format(
       Request.Url.IsDefaultPort ? "{0}://{1}{3}" : "{0}://{1}:{2}{3}",
       Request.Url.Scheme, Request.Url.Host,
       Request.Url.Port, ResolveUrl("~/"));