How to redirect by common routing

Question

I have the action

public ActionResult Edit(int id)

I need redirect to action Index if id null. How to do this in routing?

I tried:

routes.MapRoute(
                name: "Redirect from empty controller/edit to controller/list",
                url: "{controller}/Edit",
                defaults: new { controller = "Home", action = "Index" }
            );

but it not helped.

Answer 1

Hmm not sure on routing, but if it helps you could use the return RedirectToAction("index", "home"); (Where index is your action method and home is the controller you want to access it on).

Answer 2

Redirection is simple. You can check if id parameter is present by making it nullable. You don't need routing configuration. This will redirect the user to http://example.org/Home when he/she sends a request to http://example.org/Home/Edit

public ActionResult Edit(int? id)
{
    if (id == null)
    {
        return RedirectToAction("Index");
    }

    //other logic
}

If you don't want redirection and make Index action respond to a request with http://example.org/Home/Edit URL, you can create a route like this:

routes.MapRoute("HomeEdit", 
                "Home/Edit", new {controller = "Home", action = "Index"});

Just make sure this route is above the default route in RouteConfig.