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404 page not found error for an ASP.NET MVC application

Anonymous User 2183 09 Nov 2014
Hi Guys

This must be simple and already answered, but I've wasted many hours on it. I can't figure how to get an error page on mistyped address. Also I'd prefer not to redirect, but to keep the URL. I've tried many combinations of CustomErrors, HttpErrors and Application_Error, but nothing works for non-existent controller - depending on HttpErrors I always get IIS 404.0 page or just an empty 404 response. Running on IIS 7.5, MVC 3.
asp.net mvc mvc4error
Updated 10 Nov 2014
Anonymous User
Anonymous User

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1 Answers

David Miller
David Miller 10 Nov 2014
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I don't remember where I got the solution. But here is the code to handle the error: First, you create a ErrorController:

public class ErrorController : Controller
{
    //
    // GET: /Error/
    public ActionResult Index()
    {
        return RedirectToAction("Index", "Home");
    }
 
    public ActionResult Generic()
    {
        Exception ex = null;
        try
        {
            ex = (Exception)HttpContext.Application[Request.UserHostAddress.ToString()];
        }
        catch { }
 
        return View();
    }
 
    public ActionResult Error404()
    {            
        return View();
    }
}

Second, open Global file and add the following code:

protected void Application_Error(object sender, EventArgs e)
{
     Exception ex = Server.GetLastError();
     Application[HttpContext.Current.Request.UserHostAddress.ToString()] = ex;
}

Third, change customerror in your webconfig:

<customErrors mode="Off" defaultRedirect="/Error/Generic">
  <error statusCode="404" redirect="/Error/Error404"/>
</customErrors>

More: I created one more error layout. It makes things even more clear. :) 

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