MVC extends the Controller factory by implementing IControllerFactory

The extension of the controller factory either implements the IControllerFactory interface or inherits the DefaultControllerFactory. In this article, I want to experience:

 

1. When the request is routed, the controller and action names are stored in key/value pairs. We can use RequestContext. routeData. values ["action"] And RequestContext. routeData. values ["controller"] gets the name of the action or controller.

 

2. Implement the IControllerFactory interface to return different types of icontrollers Based on the controller name in the request.

 

3. When a request arrives at a Controller, you can customize the response based on the action name obtained from the route by implementing the IController interface.

 

□Homecontroller:

        public ActionResult Index()

        {

Return Content ("I'm from NewProduct/Index ");

        }

 

□Newproductcontroller:

using System.Web.Mvc;

namespace MvcApplication1.Controllers

{

    public class NewProductController : Controller

    {

        public ActionResult Index()

        {

Return Content ("I'm from NewProduct/Index ");

        }

    }

}

 

□Oldproductcontroller:

Implement the IController interface to implement custom response based on the action name obtained from the route.

using System.Web.Mvc;

namespace MvcApplication1.Controllers

{

    public class OldProductController : IController

    {

        public void Execute(System.Web.Routing.RequestContext requestContext)

        {

// The action name is saved as key/value

            string actionName = requestContext.RouteData.Values["action"].ToString().ToLower();

            switch (actionName)

            {

                case "index":

RequestContext. HttpContext. Response. Write ("I am from OldProduct/Index ");

                    break;

                default:

RequestContext. HttpContext. Response. Write ("I am from OleProduct/" + actionName );

                    break;

            }

        }

    }

}

 

□Mycontrollerfactory

Implement the IControllerFactory interface. When the controller name is new, NewProductController is returned. When the controller name is old, OldProductController is returned. By default, Home/Index is returned.

using System;

using System.Web.Mvc;

using System.Web.SessionState;

using MvcApplication1.Controllers;

namespace MvcApplication1.Extension

{

    public class MyControllerFactory : IControllerFactory

    {

        public IController CreateController(System.Web.Routing.RequestContext requestContext, string controllerName)

        {

            Type controllerType = null;

            switch (controllerName)

            {

                case "new":

                    controllerType = typeof (NewProductController);

                    break;

                case "old":

                    controllerType = typeof (OldProductController);

                    break;

                default:

                    controllerType = typeof (HomeController);

                    requestContext.RouteData.Values["controller"] = "Home";

                    requestContext.RouteData.Values["action"] = "index";

                    break;

            }

            return controllerType == null ? null : (IController) DependencyResolver.Current.GetService(controllerType);

        }

        public System.Web.SessionState.SessionStateBehavior GetControllerSessionBehavior(System.Web.Routing.RequestContext requestContext, string controllerName)

        {

            return SessionStateBehavior.Default;

        }

        public void ReleaseController(IController controller)

        {

            IDisposable disposable = controller as IDisposable;

            if (disposable != null)

            {

                disposable.Dispose();

            }

        }

    }

}

 

Register the custom controller factory globally.

        protected void Application_Start()

        {

            ......

            ControllerBuilder.Current.SetControllerFactory(new MyControllerFactory());

        }

 

Enter old/index:

Enter old/any:

Enter new/index:

Enter new/any:

Enter home/index:

Input any/any:

References:

Controller Factory and Action Invoker Part 1