ASP.NET MVC routing with one mandatory parameter and one optional parameter?

Question

I\'ve been working on a large MVC application over the past month or so, but this is the first time I\'ve ever needed to define a custom route handler, and I\'m running into

Answer 1

hi you create your rout like this i think this will hep you

routes.MapRoute(
                "Regis", // Route nameRegister
                "Artical/{id}", // URL with parameters
                new { controller = "Artical", action = "Show", id = UrlParameter.Optional } // Parameter defaults
            );

Answer 2

Try this

routes.MapRoute("MyRoute",
                 "myRoute/{param1 }/{param2 }",
                 new { controller = "MyController", action = "MyAction", param2 = UrlParameter.Optional },
                 new { param2 = @"\w+" });

you can specify one parameter as optional by using "UrlParameter.Optional" and specified second one with DataType means if you pass integer value then DataType (@"\d+") and for string i have mention above.

NOTE: Sequence of parameter is very important Optional parameter must pass at last and register your new route Before Default Route In Gloab.asax.

then you action link like

<a href="@Url.RouteUrl("MyRoute", new { param2 = "Test1",param1 = "Test2"})">Test</a>

OR with one parameter

  <a href="@Url.RouteUrl("MyRoute", new { param2 = "Test1"})">Test</a>

In you Controller

 public ActionResult MyAction(string param2,string param1)
 {
   return View()
 }

Answer 3

I assume that you created new route and left the default one that is very similar to yours. You should be aware that collection of routes is traversed to find first matching route. So if you have left the default one:

routes.MapRoute(
            "Default", // Route name
            "{controller}/{action}/{id}", // URL with parameters
            new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
        );

above your route then it will match request to http://[myserver]/My/MyAction/Test1 and call MyController.MyAction and set "Text1" to parameter named id. Which will fail because this action is not declaring one named id.

What you need to do is to move your route as first in routes list and make it more specific then it is now:

routes.MapRoute(
            "Route",
            "My/{action}/{param1}/{param2}",
            new
            {
                controller = "My",
                action = "MyAction",
                param1 = "",
                param2 = ""
            });

This will force all traffic routed trough My to match this route.