How can I properly handle 404 in ASP.NET MVC?

Question

I am using RC2

Using URL Routing:

routes.MapRoute(
    \"Error\",
     \"{*url}\",
     new { controller = \"Errors\", action = \"N         


        

Answer 1

My shortened solution that works with unhandled areas, controllers and actions:

1. Create a view 404.cshtml.

2. Create a base class for your controllers:

   public class Controller : System.Web.Mvc.Controller
   {
       protected override void HandleUnknownAction(string actionName)
       {
           Http404().ExecuteResult(ControllerContext);
       }
   
       protected virtual ViewResult Http404()
       {
           Response.StatusCode = (int)HttpStatusCode.NotFound;
           return View("404");
       }
   }
   

3. Create a custom controller factory returning your base controller as a fallback:

   public class ControllerFactory : DefaultControllerFactory
   {
       protected override IController GetControllerInstance(RequestContext requestContext, Type controllerType)
       {
           if (controllerType != null)
               return base.GetControllerInstance(requestContext, controllerType);
   
           return new Controller();
       }
   }
   

4. Add to Application_Start() the following line:

   ControllerBuilder.Current.SetControllerFactory(typeof(ControllerFactory));