How to get the root Url

The code below is a dreadful hack.

Uri linkUri = HttpContext.Current.Request.Url;
string link = linkUri.ToString().开发者_Python百科Substring(0, linkUri.ToString().IndexOf("Users/Create"));

Instead of editing the string, how do I get the correct route Url in the first place?

For example I want to get http://localhost:9999/ instead of http://localhost:9999/Users/Create

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You could use the Content method of UrlHelper:

string root = urlHelper.Content("~/");

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It's pretty ugly, but how about:

Uri uri = new Uri("http://localhost:9999/Users/Create");
string link = string.Format("{0}://{1}:{2}", uri.Scheme, uri.Host, uri.Port);

Edit: or even better:

uri.GetLeftPart(UriPartial.Authority)

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Making Sense of ASP.NET Paths - Rick Strahl's Web Log

How about this? Request.ApplicationPath

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var rootUrl = System.Web.HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Authority);