I hav asp.net mvc 3 application.
When user pass id of non existing object I return 404 view in this way:
Response.StatusCode = 404; return View("404"); Locally all works fine and I have my custom error page. But on production, I have standart asp.net 404 page. I try to set customErrors either to "on" or "off" - results is the same.
<system.webServer> ... <httpErrors errorMode="Custom" defaultResponseMode="ExecuteURL"> <remove statusCode="404" subStatusCode="-1" /> <error statusCode="404" prefixLanguageFilePath="" path="/errors/404" responseMode="ExecuteURL" /> </httpErrors> Also, there is a new way you can return 404 from an action method:
// Response.StatusCode = 404; // return View("404"); return HttpNotFound(); Found solution here: Routing for custom ASP.NET MVC 404 Error page
Set another magic setting in web config under system.webServer section:
<httpErrors errorMode="Detailed" /> 