Asp.net MVC Routelink null controller parameter

Question

I have two routes, the default one

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

I added another route, sometimes the parameter will by a string

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

When I use the "ByName" route in a RouteLink, the URL is fine, but the parameter in my controller is empty

In the view:

@Html.RouteLink(application.Nom, "ByName", new {controller= "Packaging", action = "EditApplication", name = application.Nom})

The controller

public ActionResult EditApplication(string name)

URL result is fine: .../Packaging/EditApplication/VisualStudio, but the parameter value stays null. Why?

Thank you

ramiramilu · Accepted Answer · 2015-06-09 18:28:07Z

1

You cannot have TWO Routes with same parameters and same definition, first one will take precedence. Instead, you need to have something like shown below with specific constraints in routes.

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

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

answered Jun 9, 2015 at 18:28

ramiramilu

17.2k6 gold badges51 silver badges66 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

BenoitM Over a year ago

Indeed this works, you would think that named routes would get over this, but it does not. Thank you!

Collectives™ on Stack Overflow

Asp.net MVC Routelink null controller parameter

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related