How to implement MVC custom error pages.

In this article, we will learn about how to implement MVC custom error page. Very common errors of MVC application as listed below:

Not Found: Whenever page is not found (MVC 404 Page).

Access Denied: Whenever we are trying to access folder (CAS Code Access Security) permissions or someone like same.

Internal Server Error: This error is related to internal server error.

Error Occurred: If any other error occurred in our MVC application.

In Global.asax

using customerrorpage.Controllers;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

using System.Web.Optimization;

using System.Web.Routing;

namespace customerrorpage

{

    public class MvcApplication : System.Web.HttpApplication

    {

        protected void Application_Start()

        {

            AreaRegistration.RegisterAllAreas();

            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);

            RouteConfig.RegisterRoutes(RouteTable.Routes);

            BundleConfig.RegisterBundles(BundleTable.Bundles);

           

        }

        protected void Application_Error(object sender, EventArgs e)

        {

            var httpContext = ((MvcApplication)sender).Context;

            var currentController = " ";

            var currentAction = " ";

            var currentRouteData = RouteTable.Routes.GetRouteData(new HttpContextWrapper(httpContext));

            if (currentRouteData != null)

            {

                if (currentRouteData.Values["controller"] != null && !String.IsNullOrEmpty(currentRouteData.Values["controller"].ToString()))

                {

                    currentController = currentRouteData.Values["controller"].ToString();

                }

                if (currentRouteData.Values["action"] != null && !String.IsNullOrEmpty(currentRouteData.Values["action"].ToString()))

                {

                    currentAction = currentRouteData.Values["action"].ToString();

                }

            }

            var ex = Server.GetLastError();

            var controller = new ErrorController();

            var routeData = new RouteData();

            var action = "Index";

            if (ex is HttpException)

            {

                var httpEx = ex as HttpException;

                switch (httpEx.GetHttpCode())

                {

                    case 404:

                        action = "NotFound";

                        break;

                    case 401:

                        action = "AccessDenied";

                        break;

                    case 500:

                        action = "InternalServerError";

                        break;

                }

            }

            httpContext.ClearError();

            httpContext.Response.Clear();

            httpContext.Response.StatusCode = ex is HttpException ? ((HttpException)ex).GetHttpCode() : 500;

            httpContext.Response.TrySkipIisCustomErrors = true;

            routeData.Values["controller"] = "Error";

            routeData.Values["action"] = action;

            controller.ViewData.Model = new HandleErrorInfo(ex, currentController, currentAction);

            ((IController)controller).Execute(new RequestContext(new HttpContextWrapper(httpContext), routeData));

        }

   

    }

}

In ErrorController.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

namespace customerrorpage.Controllers

{

    public class ErrorController : Controller

    {

    

        [HttpGet]

        public ActionResult Index()

        {

            TempData["error"] = "Error Occurred!";

            return View();

        }

   

        public ActionResult NotFound()

        {

            TempData["error"] = "Page not Found";

            return View();

        }

      

        [HttpGet]

        public ActionResult AccessDenied()

        {

            TempData["error"] = "Access Denied";

            return View("Index");

        }

        [HttpGet]

        public ActionResult InternalServerError()

        {

            TempData["error"] = "Internal Server Error";

            return View("Index");

        }

    }

}

In View.cshtml

@{

    ViewBag.Title = @TempData["error"];

    Layout = null;

}

<div id="wrapper">

    <div id="page-wrapper">

        <div class="row">

            <div class="col-lg-13">

                <div class="panel-heading">

                    <h2 class="page-header">

                        Error!

                    </h2>

                </div>

                <div class="panel-body">

                    <div>

                        <h4>

                            Error:

                        </h4>

                        @TempData["error"]

                    </div>

                    <div>

                        <h4>

                            Error Description:

                        </h4>

                        <div class="alert alert-warning">

                            @Model.Exception.Message.ToString() @Html.Raw(" ") @Model.ControllerName @Html.Raw(" ") @Model.ActionName

                        </div>

                    </div>

                </div>

            </div>

        </div>

    </div>

</div>

Out-Put:-