Routing for custom ASP NET MVC 404 Error page

Question

I am trying to make a custom HTTP 404 error page when someone types in a URL that doesn t invoke a valid action or controller in ASP NET MVC  instead of it displaying the generic  Resource Not Found  ASP NET error   I don t want to use the web config to handle this   Is there any kind of routing magic I can do to catch any invalid URLs   Update  I tried the answer given  however I still get the ugly  Resource Not Found  message   Another update  Ok  apparently something changed in RC1  I ve even tried specifically trapping 404 on an HttpException and it still just gives me the  Resource Not Found  page   I ve even used MvcContrib s resource s feature and nothing - same problem  Any ideas

User · Answer

Here is true answer which allows fully customize of error page in single place. No need to modify web.config or create separate code.

Works also in MVC 5.

Add this code to controller:

        if (bad) {
            Response.Clear();
            Response.TrySkipIisCustomErrors = true;
            Response.Write(product + I(" Toodet pole"));
            Response.StatusCode = (int)HttpStatusCode.NotFound;
            //Response.ContentType = "text/html; charset=utf-8";
            Response.End();
            return null;
        }

Based on http://www.eidias.com/blog/2014/7/2/mvc-custom-error-pages

User · Answer

I got my error handling to work by creating an ErrorController that returns the views in this article  I also had to add the  Catch All  to the route in global asax    I cannot see how it will get to any of these error pages if it is not in the Web config    My Web config had to specify   customErrors mode  On  defaultRedirect    Error Unknown    and then I also added   error statusCode  404  redirect    Error NotFound

User · Answer

If you work in MVC 4  you can watch this solution  it worked for me   Add the following Application Error method to my Global asax   protected void Application Error object sender  EventArgs e        Exception exception   Server GetLastError        Server ClearError         RouteData routeData   new RouteData        routeData Values Add  controller    Error        routeData Values Add  action    Index        routeData Values Add  exception   exception        if  exception GetType      typeof HttpException                 routeData Values Add  statusCode     HttpException exception  GetHttpCode               else               routeData Values Add  statusCode   500              IController controller   new ErrorController        controller Execute new RequestContext new HttpContextWrapper Context   routeData        Response End      The controller itself is really simple   public class ErrorController   Controller       public ActionResult Index int statusCode  Exception exception                Response StatusCode   statusCode          return View              Check the full source code of Mvc4CustomErrorPage at GitHub

User · Answer

Just add catch all route at the end of the routes table and display whatever page you want with it   See  How can i make a catch all route to handle  404 page not found  queries for ASP NET MVC

User · Answer

I will talk about some specific cases   if you are using  PageNotFound method  in HomeController like below   Route    404    public ActionResult PageNotFound       return MyView        it wouldn t work this  But you must clear Route tags like below      Route    404    public ActionResult PageNotFound       return MyView        And if you change it as method Name in web config it works   However don t forget to do code like below in web config   lt customErrors mode  On  gt     lt error statusCode  404  redirect    PageNotFound    gt        it is not    404  because it is not accepted url in Route Tag like  Route  404      lt  customErrors gt

User · Answer

Try this in web config to replace IIS error pages  This is the best solution I guess  and it sends out the correct status code too    lt system webServer gt     lt httpErrors errorMode  Custom  existingResponse  Replace  gt       lt remove statusCode  404  subStatusCode  -1    gt       lt remove statusCode  500  subStatusCode  -1    gt       lt error statusCode  404  path  Error404 html  responseMode  File    gt       lt error statusCode  500  path  Error html  responseMode  File    gt     lt  httpErrors gt   lt  system webServer gt    More info from Tipila - Use Custom Error Pages ASP NET MVC

User · Answer

This solution doesn t need web config file changes or catch-all routes    First  create a controller like this   public class ErrorController   Controller       public ActionResult Index                 ViewBag Title    Regular Error           return View               public ActionResult NotFound404                 ViewBag Title    Error 404 - File not Found           return View  Index              Then create the view under  Views Error Index cshtml  as             Layout      Views Shared  Layout cshtml                               lt p gt We re sorry  page you re looking for is  sadly  not here  lt  p gt    Then add the following in the Global asax file as below    protected void Application Error object sender  EventArgs e               Do whatever you want to do with the error            Show the custom error page            Server ClearError             var routeData   new RouteData            routeData Values  controller      Error            if   Context Server GetLastError   is HttpException   amp  amp    Context Server GetLastError   as HttpException  GetHttpCode      404                         routeData Values  action      Index                     else                          Handle 404 error and response code             Response StatusCode   404              routeData Values  action      NotFound404                      Response TrySkipIisCustomErrors   true     If you are using IIS7  have this line         IController errorsController   new ErrorController            HttpContextWrapper wrapper   new HttpContextWrapper Context           var rc   new System Web Routing RequestContext wrapper  routeData           errorsController Execute rc            Response End        If you still get the custom IIS error page after doing this  make sure the following sections are commented out or empty  in the web config file     lt system web gt      lt customErrors mode  Off    gt   lt  system web gt   lt system webServer gt         lt httpErrors gt           lt  httpErrors gt   lt  system webServer gt

User · Answer

I ve tried to enable custom errors on production server for 3 hours  seems I found final solution how to do this in ASP NET MVC without any routes   To enable custom errors in ASP NET MVC application we need  IIS 7      Configure custom pages in web config under system web section    lt customErrors mode  RemoteOnly   defaultRedirect    error  gt       lt error statusCode  404  redirect    error Error404    gt       lt error statusCode  500  redirect    error    gt   lt  customErrors gt    RemoteOnly means that on local network you will see real errors  very useful during development   We can also rewrite error page for any error code  Set magic Response parameter and response status code  in error handling module or in error handle attribute     HttpContext Current Response StatusCode   500    HttpContext Current Response TrySkipIisCustomErrors   true   Set another magic setting in web config under system webServer section    lt httpErrors errorMode  Detailed    gt     This was final thing that I ve found and after this I can see custom errors on production server

User · Answer

I had the same problem  the thing you have to do is  instead of adding the customErrors attribute in the web config file in your Views folder  you have to add it in the web config file in your projects root folder

User · Answer

Source  NotFoundMVC - Provides a user-friendly 404 page whenever a controller  action or route is not found in your ASP NET MVC3 application  A view called NotFound is rendered instead of the default ASP NET error page   You can add this plugin via nuget using  Install-Package NotFoundMvc  NotFoundMvc automatically installs itself during web application start-up  It handles all the different ways a 404 HttpException is usually thrown by ASP NET MVC  This includes a missing controller  action and route   Step by Step Installation Guide    1 - Right click on your Project and Select Manage Nuget Packages     2 - Search for NotFoundMvc and install it    3 - Once the installation has be completed  two files will be added to your project  As shown in the screenshots below     4 - Open the newly added NotFound cshtml present at Views Shared and modify it at your will  Now run the application and type in an incorrect url  and you will be greeted with a User friendly 404 page     No more  will users get errors message like Server Error in     Application  The resource cannot be found   Hope this helps     P S   Kudos to Andrew Davey for making such an awesome plugin

[asp.net] Routing for custom ASP.NET MVC 404 Error page

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