Question

How can I find the route that matches a string url in ASP.NET MVC?

This is not for the purposes of debugging.

I am generating a link using Request.UrlReferrer but we need to restrict this to specific controller actions in our application. Ideally we would so something like so:

@Url.PreviousUrl(
    default: Url.Action("index", "home")
    validRoutes: new[] { 
        new { controller = "list", "projects" }
        new { controller = "tagged", "projects" },
        new { controller = "details", "category" }
    }
);

If the UrlReferrer matches any of those routes then we will redirect to it, otherwise we will redirect to the default url specified.

Answer 1

You can call GetRouteData as follows. There may be a better way, but I’ve used similar in unit testing

http://bradwilson.typepad.com/blog/2010/07/testing-routing-and-url-generation-in-aspnet-mvc.html