asp.net-mvcrazorerror-handlingviewrendering

Error handling last chance to catch View Rendering exception


I've got ErrorController which customly handles my website errors.

It's pretty standard:

public class ErrorController : BaseController
{
    public ActionResult Error404(Exception ex)
    {
        return View();
    }
    public ActionResult Error500(Exception ex)
    {
        return View();
    }
}

However, in case if some rendering exception occurs inside of the View code (and this might occur, as the page has Master page (master layout) and different might happen), then I am not able to catch that rendering exception.

I can really see that exception with implementing ActionFilterAttribute.OnResultExecuted:

    public override void OnResultExecuted(ResultExecutedContext filterContext)
    {
        if (filterContext.Exception != null)
        {
            // not sure what to do here
        } else base.OnResultExecuted(filterContext);
    }

but in that case MVC looks for ~/Shared/Error.cshtml (incl. this path) after that exception occurs, and I can't provide the Errors view rendering exception to the user -- the "Last chance exception".

Is there any way to handle that?


Solution

  • Here is a nice article on Exception handling in ASP.Net MVC that should help

    Method 4:- Inheriting from “HandleErrorAttribute”

    public class CustomHandleErrorAttribute: HandleErrorAttribute
    {
        public override void OnException(ExceptionContext filterContext)
        {
            Exception ex = filterContext.Exception;
            filterContext.ExceptionHandled = true;
            var model = new HandleErrorInfo(filterContext.Exception, "Controller", "Action");
    
            filterContext.Result = new ViewResult()
            {
                ViewName = "Error",
                ViewData = new ViewDataDictionary(model)
            };
        }
    }
    

    And you attach that to your base controller.