RedirectToRoute如何工作以及如何在其中传递数据？

Question

I'm trying to redirect to a route that is in the RecomController and the action is Index, i have defined the path in my RouteConfig file and have also specified an id parameter that i pass when i call my RedirectToRoute function. For some reason it can't find that path.

I have also created a Route attribute above the RecomController Index action but it still doesn't navigate me to that path. Am i missing something?

RouteConfig.cs:

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

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

RecomController.cs:

 [Route("Recom/Index")]
        public ActionResult Index(int id)
        {
         ............//Functioning
        }

Calling the function (IN ANOTHER CONTROLLER):

ProjectController.cs:

return RedirectToRoute("Recom/Index/{id}", new {id = projectdto.Id });

Answer 1

Sounds like you're using wrong route name or path in RedirectToRoute() , hence it doesn't work:

// this is wrong because first parameter did not match
return RedirectToRoute("Recom/Index/{id}", new {id = projectdto.Id });

For two parameters overload, it requires route name (not route path) and route values, as shown in definition below:

protected internal RedirectToRouteResult RedirectToRoute(string routeName, 
                           RouteValueDictionary routeValues)

Hence, you need to provide complete route name and route values defined in RegisterRoutes (eg Recomroute ).

return RedirectToRoute("Recomroute", new {
    controller = "Recom", 
    action = "Index", 
    id = projectdto.Id
});

Side notes:

1) You still need to provide controller , action and id parameters in order to match route definition.

2) The Recomroute seem defined below default route with same route segments definition which overrides all custom routes beneath it, if you want to evaluate Recomroute first move it to the top order and use different path against default route.