Get URL of file from object that does not inherit System.Web.Ui.Page

Question

Hello,

I have an object that requires the URL of a file that resides in the root of my web application. If this was an object that inherited from System.Web.Ui.Page I would just use the httpRequest object. However because this object does not I am uncertain how to get this url. Depending on the calling object, the url will be either /something.htm or ~/something.htm

Can someone show me the way? Thanks!

-Nick

Answer 1

I'm not sure why you'd use HttpRequest for this, but you can use HttpContext.Current.Request, assuming that HttpContext.Current is not null.

Answer 2

John's got it right. You can/should use the HttpContext.Current.Request object as he stated. I think you are also looking for the Url up to the root only. In other words, you don't want the page name or query string params if they exist.

This routine is a little obnoxious but it should give you what you need. Notice the reference to HttpContext.Current.Request.

private string UrlUpToRootWithNoPageReferenceOrQueryStringParameters()
{
    string Port = HttpContext.Current.Request.ServerVariables["SERVER_PORT"];

    if (Port == null || Port == "80" || Port == "443")
        Port = "";
    else
        Port = ":" + Port;

    string Protocol = HttpContext.Current.Request.ServerVariables["SERVER_PORT_SECURE"];

    if (Protocol == null || Protocol == "0")
        Protocol = "http://";
    else
        Protocol = "https://";

    return Protocol + Context.Request.ServerVariables["SERVER_NAME"] + Port + Context.Request.ApplicationPath;
}

There are shorter ways to get what you want, but again the routine above will work. If you're interested in more, check out Rick Strahl's Making Sense of ASP.NET Paths for more.