How to re-route exception without marking Exception as handled - asp.net

Question

Basically when my app has an unhandled exception I want it to be recorded as an unhandled exception by IIS (so that it can be seen on Event Viewer, for example) but I also want to route the user to an error controller.
I've overridden the OnException method of my controller in order to route users to a custom error page. The crux of the problem is this code:
protected override void OnException(ExceptionContext filterContext)
{
filterContext.Result = RedirectToAction("GeneralError", "Error", new{ routeValueA = "some value", routeValueB = "some other value"});
filterContext.ExceptionHandled = false;
}
My Problem is this: If I set filterContext.ExceptionHandled = false then I get a yellow screen of death instead of being rerouted to my error handling controller. If i set filterContext.ExceptionHandled = true then I get rerouted, but the exception is not recorded as an unhandled exception.
I know I can set a static error page using the web.config, but I don't want to do this, because then I can't use route values to dynamically send data to my Error Controller.
Can I succesfully set a result to my filterContext.Result without marking filterContext.ExceptionHandled= true?

Answer 1

try following from this source
protected override void OnException(ExceptionContext filterContext)
{
if (filterContext.ExceptionHandled)
{
return;
}
filterContext.Result = new ViewResult
{
ViewName = "~/Views/Shared/Error.aspx"
};
filterContext.ExceptionHandled = true;
}
Or You can even try this too
set custom errors in web.config as below:
<customErrors mode="On" defaultRedirect="~/Error">
<error redirect="~/Error/NotFound" statusCode="404" />
<error redirect="~/Error/UnauthorizedAccess" statusCode="403"/>
</customErrors>
Your ErrorController:
public class ErrorController : Controller
{
public ViewResult Index()
{
return View("Error");
}
public ViewResult NotFound()
{
Response.StatusCode = 404; //you may want to set this to 200
return View("NotFound");
}
public ViewResult UnauthorizedAccess()
{
Response.StatusCode = 404; //you may want to set this to 200
return View("UnauthorizedAccess");
}
}
Register HandleErrorAttribute as a global action filter in the FilterConfig class as follows:
public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
filters.Add(new CustomHandleErrorAttribute());
filters.Add(new AuthorizeAttribute());
}
UPDATE
I suggest you to read this answer as it gives the complete detail to the question you have asked and I hope you will find a good solution there!!

Answer 2

I believe what you are looking for is Custom Error Pages that you can set in your web.config file and tell IIS to redirect to a custom error page instead of the default (as you called it yellow page of death :) ) for any unhandled exceptions.
This might help :
How to make custom error pages work in ASP.NET MVC 4