HttpHandler Examples

HttpHandler and how to create your own http handler :

1. Create a class that implements IHttpHandler interface 

2. Expose properties and method IsReusable and ProcessRequest

Step 1:  File ---> New Project ---> ASP .Net Web Application















2: Create Class DemoHttpHandler and Implement IHttpHandler 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Routing;

namespace HttpHandler.App_Start

{

    public class DemoHttpHandler : IHttpHandler

    {

        public RequestContext RequestContext

        {

            get;

            set;

        }

        public DemoHttpHandler(RequestContext reqCon)

        {

            RequestContext = reqCon;

        }

        public bool IsReusable

        {

            get

            {

                return true;

            }

        }

        public void ProcessRequest(HttpContext context)

        {

            context.Response.Write("Hello Sandeep");

        }

    }

}

3: We need Route Handler the you create another class with name RouteHandler show below screen

Route Handler implement using the using System.Web.Routing;

Namespace and implement IRouteHandler shows below code

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Routing;

namespace HttpHandler.App_Start

{

    public class RouteHandler : IRouteHandler

    {

        public IHttpHandler GetHttpHandler(RequestContext requestContext)

        {

            //call Parameterised constructor in DemoHttpHandler

            return new DemoHttpHandler(requestContext);

           

        }

    }

}

4: Register your HttpHandler in the RouteConfig File

using HttpHandler.App_Start;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

using System.Web.Routing;

namespace HttpHandler

{

    public class RouteConfig

    {

        public static void RegisterRoutes(RouteCollection routes)

        {

            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

            routes.Add(new Route("Home/Demo", new RouteHandler()));

            routes.MapRoute(

                name: "Default",

                url: "{controller}/{action}/{id}",

                defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }

            );

        }

    }

}

5: Now ,there is no need to create Custom Action Method inside Home/Demo because HttpHandler will get invoked before the ActionResult gets Executed.

Go To HomeController and Add Below Code

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

namespace HttpHandler.Controllers

{

    public class HomeController : Controller

    {

        public ActionResult Index()

        {

            return View();

        }

        public ActionResult About()

        {

            ViewBag.Message = "Your application description page.";

            return View();

        }

        public ActionResult Contact()

        {

            ViewBag.Message = "Your contact page.";

            return View();

        }

        public ActionResult Demo()

        {

            return View();

        }

    }

}

6: Run The Application then displ

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