R – ASP.Net MVC routing strategy

asp.net-mvcrouting

I've been playing with ASP.Net MVC for a while now. I found the most difficult thing to get right is the routing table.

I found most examples leave the default route in place. I found that this leads to a lot of errors where the default route redirects to HomeController with an action that doesnt exist. Leading to strange error messages where you would expect to see a simple 404.

I eventually settled for a routing setup where I explicitly define all controller/action combinations I want to allow with a catch-all at the end to redirect to a 404 page that shows a sensible error message.

Am I missing something here? Or is this indeed a good way to do things?

Looking at the answers I got I think I'd better clarify the question a bit.

I'm trying to fool-proof the routing scheme of the website I'm building. I noticed that when I leave in the default {controller}/{action}/{id} route all kinds of URL's where I would like to display a 404 error actually get routed to the HomeController with an invalid Action and result in some ugly error message instead.

I'm a bit confused because most code examples just leave in the default route. Is there a reason it's there or is it ok to remove it?

The scheme I'm using now looks a bit like this

        routes.MapRoute( "About", "About", new {controller = "Page", action = "About"} );
        routes.MapRoute( "SignIn", "SignIn", new {controller = "Page", action = "SignIn"} );
        routes.MapRoute( "SignOut", "SignOut", new {controller = "Page", action = "SignOut"} );
        routes.MapRoute( "Authenticate", "Authenticate", new { controller = "Authentication", action = "Authenticate" });

        routes.MapRoute("CatchAll", "{*url}", new { controller = "Error", action = "Http404" });

I've got a route specified for every action in the system. And a catchall to display a 404 at the end. Is this a good way to do this or is there an easier way to make the routing scheme fool-proof?

Best Answer

If this is the default route you are using:

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

then "HomeController" and the "Index" action will be used by default unless your URL specifies otherwise.

For example:

"http://www.something.com/" will use the Home controller's Index action, because those are the default controller and action.

"http://www.something.com/foo" will use the Foo controller's Index action, because "Index" is the default action.

"http://www.something.com/foo/bar" will use the Foo controller's "bar" action

"http://www.something.com/foo/bar/1" will use the Foo controller's "bar" action, passing "1" as the "id" parameter

If you don't have a "FooController", anything that starts with "http://www.something.com/foo" will fail. Similarly, if your FooController doesn't have a "Bar" action, then "http://www.something.com/foo/bar" will fail.

You may already know everything I posted above. If that is the case, will you post the URLs that are failing, so we can better help?

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