Custom Error Page in ASP.NET MVC

@model System.Web.Mvc.HandleErrorInfo  
  
@{  
    ViewBag.Title = "Error";  
}  
  
<div style="background-color: #A52A2A; color: White; height: 10px;">  
</div>  
<div style="background-color: #F5F5DC; color: White; height: 170px;">  
    <div style=" padding:20px;">  
        <h3>  
            Application Error:</h3>  
        <h4>  
            Sorry, an error occurred while processing your request.  
        </h4>  
        <h6>@Html.ActionLink("Go Back To Home Page", "Index", "Home")</h6>  
        <br />  
        <br />  
    </div>  
</div>  
<div style="background-color: #A52A2A; color: White; height: 20px;">  
</div>

<customErrors mode="On">  
</customErrors>  

[HandleError]
public ActionResult Index()
{
    return View();
}

Repeat Step: Try to run or Browse for a View Page that is not available (A Controller whose View is not added.).

If you add the Attributes [HandleError] to any Action Method, you will be shown your own Customized Error page written now, rather than the default Error Page.

Now add specific error pages based on the HTTP Status Code.

Such as one specific Error Page to show when the HTTP Status Code is 404.

Add a Controller to the Controller Folder and name it Error.

Add some action methods to the Controller.

Error Controller

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace MvcApplication3.Controllers
{
    public class ErrorController : Controller
    {
        //
        // GET: /Error/

        public ActionResult Index()
        {
            return View();
        }

        public ActionResult NotFound()
        {
            return View();
        }
    }
}

Add a View Named NotFound to the Shared Folder, as you have done earlier.

Note. We are adding this View to the Shared Folder because Views inside the Shared Folder are available to the complete application.

Right-click then select View, then go to Shared Folder and Add a View named NotFound.

And Design the View depending on your requirements.

Not Found. cshtml

@{  
    ViewBag.Title = "NotFound";  
}  
  
<div style="background-color: #A52A2A; color: White; height: 10px;">  
</div>  
<div style="background-color: #F5F5DC; color: White; height: 170px;">  
    <div style=" padding:20px;">  
        <h3>  
            Application Error:</h3>  
        <h4>  
            Sorry, The Page, You are Looking for is not found.  
        </h4>  
        <h6>@Html.ActionLink("Go Back To Home Page", "Index", "Home")</h6>  
        <br />  
        <br />  
    </div>  
</div>  
<div style="background-color: #A52A2A; color: White; height: 20px;">  
</div> 

Again go to the Root folder, then Web. config file. Go inside System .web and modify it.

<customErrors mode="On">  
   <error statusCode="404" redirect="~/Error/NotFound"/>  
</customErrors>

Explanation

Now run the application, try to navigate to an unavailable View and you will see the Customized Error Page rather than the default Error Page.

Default Error Page, Example.

Customized Error Page.

Now, if any error occurs then the Customized Error Page will be shown.

This was all about how to display a custom error page in ASP.NET MVC.

Similarly, design all other Custom Error pages depending on the HTTP Status Code.

Note. The preceding information is gathered by me depending on the results of studying, experience, Internet Browsing, and Video Tutorials.