ASP.NET: How to get the virtual path of a file from a generic handler?
How can i resolve a virtual path to a file into a path, suitable for the browser, from within a generic .ashx handler?
e.g. i want to convert:
~/asp/ClockState.aspx
into开发者_Go百科
/NextAllowed/asp/ClockState.aspx
If i were a WebForm Page
, i could call ResolveUrl
:
Page.ResolveUrl("~/asp/ClockState.aspx")
which resolves to:
/NextAllowed/asp/ClockState.aspx
But i'm not a WebForm Page, i'm a generic handler. You know, that IHttpHandler
object with all kinds of things injected:
public class ResetClock : IHttpHandler
{
public void ProcessRequest (HttpContext context)
{
//[process stuff]
//Redirect client
context.Response.Redirect("~/asp/ClockState.aspx", true);
}
public bool IsReusable { get { return false; } }
}
You can use the VirtualPathUtility class to do this. This contains various methods for working with paths. The one you need is ToAbsolute(), which will convert a relative path to an absolute one.
var path = VirtualPathUtility.ToAbsolute("~/asp/ClockState.aspx");
However, you can use the tilde in Response.Redirect calls anyway, so the following would still work:
Response.Redirect("~/asp/ClockState.aspx");
You do not need to convert the URL to an absolute path before using Response.Redirect.
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