Custom error page ,when Http error occured without changing url - asp.net-mvc

Question

How to show custom error page ,when Http error occured without changing url.
When Http error occured then how to show customer custom error page without routing to another Url.

Answer 1

The below method will not use a redirect - it will return your custom error + correct httpstatus code as an immediate response to the client, by catching the error in the application_error method and then choosing what to return within the same response, removing the need to redirect.
Create an ErrorController - this allows you to tailor your end-user error pages and status codes.:
[AllowAnonymous]
public class ErrorController : Controller
{
public ActionResult PageNotFound()
{
Response.StatusCode = 404;
return View();
}
public ActionResult ServerError()
{
Response.StatusCode = 500;
return View();
}
public ActionResult UnauthorisedRequest()
{
Response.StatusCode = 403;
return View();
}
//Any other errors you want to specifically handle here.
public ActionResult CatchAllUrls()
{
//throwing an exception here pushes the error through the Application_Error method for centralised handling/logging
throw new HttpException(404, "The requested url " + Request.Url.ToString() + " was not found");
}
}
Add a route to catch all urls to the end of your route config - this captures all 404's that are not already caught by matching existing routes:
routes.MapRoute("CatchAllUrls", "{*url}", new { controller = "Error", action = "CatchAllUrls" });
In your global.asax:
protected void Application_Error(object sender, EventArgs e)
{
Exception exception = Server.GetLastError();
//Error logging omitted
HttpException httpException = exception as HttpException;
RouteData routeData = new RouteData();
IController errorController = new Controllers.ErrorController();
routeData.Values.Add("controller", "Error");
routeData.Values.Add("area", "");
routeData.Values.Add("ex", exception);
if (httpException != null)
{
//this is a basic exampe of how you can choose to handle your errors based on http status codes.
switch (httpException.GetHttpCode())
{
case 404:
Response.Clear();
// page not found
routeData.Values.Add("action", "PageNotFound");
Server.ClearError();
// Call the controller with the route
errorController.Execute(new RequestContext(new HttpContextWrapper(Context), routeData));
break;
case 500:
// server error
routeData.Values.Add("action", "ServerError");
Server.ClearError();
// Call the controller with the route
errorController.Execute(new RequestContext(new HttpContextWrapper(Context), routeData));
break;
case 403:
// server error
routeData.Values.Add("action", "UnauthorisedRequest");
Server.ClearError();
// Call the controller with the route
errorController.Execute(new RequestContext(new HttpContextWrapper(Context), routeData));
break;
//add cases for other http errors you want to handle, otherwise HTTP500 will be returned as the default.
default:
// server error
routeData.Values.Add("action", "ServerError");
Server.ClearError();
// Call the controller with the route
errorController.Execute(new RequestContext(new HttpContextWrapper(Context), routeData));
break;
}
}
//All other exceptions should result in a 500 error as they are issues with unhandled exceptions in the code
else
{
routeData.Values.Add("action", "ServerError");
Server.ClearError();
// Call the controller with the route
errorController.Execute(new RequestContext(new HttpContextWrapper(Context), routeData));
}
}

Answer 2

Add following <customErrors> tag in the web.config that helps you to redirect to the NotFound action method of Error controller if the system fails to find the requested url (status code 404) and redirects to ServerError action method of error controller if the system fires an internal server error (status code 500)
<!--<Redirect to error page>-->
<customErrors mode="On" defaultRedirect="~/Error/ServerError">
<error redirect="~/Error/NotFound" statusCode="404" />
</customErrors>
<!--</Redirect to error page>-->
You have to create an Error controller that contains ServerError and NotFound action method that renders the related view to display the proper message to the user.
public class ErrorController : Controller
{
public ActionResult NotFound()
{
return View();
}
public ActionResult Error()
{
return View();
}
}
Edit 2:
For remain the same url while custom error occurs, you need to install Magical Unicorn Mvc Error Toolkit 2.2.2 nuget package.
you can follow the following steps to work with:
Open solution in visual studio
Go to Tools menu and select Nuget Package Manager
Select Package Manager Console from sub menu
Write PM> Install-Package MagicalUnicorn.MvcErrorToolkit in Package Manager Console
you can visit here for more info about the nuget package
It will install the nuget package that will work as per your requirement.