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

In MVC4 WebAPI 404 can be handle in the following way,

COURSES APICONTROLLER

    // GET /api/courses/5
    public HttpResponseMessage Get(int id)
    {
        HttpResponseMessage resp = null;

        var aCourse = _courses.Where(c => c.Id == id).FirstOrDefault();

        resp = aCourse == null ? new HttpResponseMessage(System.Net.HttpStatusCode.NotFound) : new HttpResponseMessage(aCourse);

        return resp;
    }

HOME CONTROLLER

public ActionResult Course(int id)
{
    return View(id);
}

VIEW

GLOBAL

public static void RegisterRoutes(RouteCollection routes)
{
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

    routes.MapHttpRoute(
        name: "DefaultApi",
        routeTemplate: "api/{controller}/{id}",
        defaults: new { id = RouteParameter.Optional }
    );

    routes.MapRoute(
        name: "Default",
        url: "{controller}/{action}/{id}",
        defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
    );
}

RESULTS