ASP.NET MVC routing 404

Question

I have add a new route in a default mvc project like this:

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

And I have a action method like this(with a controller name as "user"):

public ActionResult card(string userId, string cardId="")
        {
            if (string.IsNullOrEmpty(cardId))
            {
                return Json(new[]{
                    new {id=456, number="1234", name="ayj"},
                    new {id=123, number="2345", name="xxx"}
                }, JsonRequestBehavior.AllowGet);
            }
            else
            {
                return Json(new { id = 123, number = "2345", name = "xxx" }, JsonRequestBehavior.AllowGet);
            }
        }

When I visit /user/1/card/2, it returns the correct json, however when I visit /user/1/card, I expect it to return an array, but it turns out to return a 404 error. Any one could help me?

Answer 1

I think when you use the URL without cardId, route engine is using your default route, therefore 404, move your custom route above the default route.