Route with Two optional parameters in MVC3 not working

You’re missing the parameters in your route config. In order to make this work with different parameters optional (as in Phil Haack’s post), you need to define multiple routes

routes.MapRoute("UserDetail-WithStatus", 
                "UserDetail/{id}/{inSaveAction}/{status}", 
                 new
                 {
                     controller = "Admin",
                     action = "UserDetail",
                     // nothing optional 
                 }
);

routes.MapRoute("UserDetail-WithoutStatus", 
                "UserDetail/{id}/{inSaveAction}", 
                 new
                 {
                     controller = "Admin",
                     action = "UserDetail",
                     // nothing optional 
                 }
);

routes.MapRoute("UserDetail-WithoutSaveAction", 
                "UserDetail/{id}", 
                 new
                 {
                     controller = "Admin",
                     action = "UserDetail",
                     id = UrlParameter.Optional
                 }
);

And then create links with:

@Html.ActionLink("Link", "Index", "Admin", new { id = 1, inSaveAction = true, success = "success" }, null)

You’ll also need to set the optional parameters as nullable, otherwise you’ll get exceptions if id or inSaveAction are missing.

public ActionResult UserDetail(int? id, bool? inSaveAction, string status)
{

}