How to add a route to MVC3 converting part the URL to an argument?

Question

How can I add a route that would catch all URLs pointing to a controller so that all arguments after the controller name gets transformed into a single argument string?

I need this sort of mapping:

URL /Image/foo.png     -> Controller: Image, Action: Index, argument "foo.png"
URL /Image/A/foo.png   -> Controller: Image, Action: Index, argument "/A/foo.png"
URL /Image/A/B/foo.png -> Controller: Image, Action: Index, argument "/A/B/bar.png"

This is my action inside ImageController

public ImageResult Index(string file)
{
    // foo bar
}

This is what I tried

routes.MapRoute(null, "Image/{file*}", new { controller = "Image", action = "Index" });

URL /Image/baz.png works, file is "baz.png". URL /Image/A/foo.png does not work, my action is not hit.

Answer 1

You are very close. It should be

"Image/{*file}"

That way file will contain everyting in the URL following Image/.