Can not access a controller (ASP.NET MVC)

Question

This controller:

public class TestController <T> : Controller
{
    public string Index()
    {             
        return "123";
    }
}

This definition of the routes:

routes.MapRoute(
     "Default",
     "{controller}/{action}/{id}",
     new
     {
          controller = "Test<T>",
          action = "Index",
          id = "" 
     });

This is the error I get:

The IControllerFactory 'Yad2.Web.Mvc.UI.Infrastructure.NinjectControllerFactory' did not return a controller for the name 'Test'.

How come you are using a generic controller? I've never seen that before. — Andy T
– Andy T, Commented Mar 21, 2014 at 18:21

Khalid Abuhakmeh · Accepted Answer · 2014-03-21 18:21:07Z

1

public class TestController <T>   : Controller
{
    public string Index( )
    {             
        return "123";
    }
}

List of things wrong here:

Controllers cannot be generic abstract classes, you need to define T.
All actions need to return ActionResult derived objects.
"Test" in your route definition is absolutely incorrect. Never going to work.
You never showed your Ninject registration.

answered Mar 21, 2014 at 18:21

Khalid Abuhakmeh

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4 Comments

krillgar Over a year ago

Agreed with everything but 2. You can return string or bool from Action Result methods.

Nitin Midha Over a year ago

There is a way to use a Generic controller.. Check this post: stackoverflow.com/questions/848904/…

Khalid Abuhakmeh Over a year ago

@krillgar it isn't advised you do so, if you want to do that use the Content() method in the controller.

Khalid Abuhakmeh Over a year ago

@NitinMidha The controller in the link you sent me is a generic controller where T is defined. It is not defined in the above code. Essentially this user wants to magically pull a generic type out of thin air. You can't do that unless you build a mechanism to set T dynamically and create it (maybe using route values). MVC will not resolve abstract controllers.

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