Routing for custom ASP.NET MVC 404 Error page

user_22093 0
Viewed 166647

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?

custom-error-pages http-status-code-404 asp.net-mvc-routing asp.net-mvc asp.net
10 Answers

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.

<system.webServer>
  <httpErrors errorMode="Custom" existingResponse="Replace">
    <remove statusCode="404" subStatusCode="-1" />
    <remove statusCode="500" subStatusCode="-1" />
    <error statusCode="404" path="Error404.html" responseMode="File" />
    <error statusCode="500" path="Error.html" responseMode="File" />
  </httpErrors>
</system.webServer>

More info from Tipila - Use Custom Error Pages ASP.NET MVC

user_3814070
Alex_Reitbort_115250

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_2307050

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

<customErrors mode="On">
  <error statusCode="404" redirect="~/PageNotFound" /> 
 *// it is not "~/404" because it is not accepted url in Route Tag like [Route("404")]*
</customErrors>
user_50620660
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