Question

I have an exception handling in my application very similar to this solution:
http://www.devcurry.com/2012/06/aspnet-mvc-handling-exceptions-and-404.html

There is a nasty bug in my app where it is possible for the sql to deadlock with an other process. This happens rarely (1-2 requests fail daily because of this), but it still happens.

How can I automatically refresh the page on sql deadlock (and hide the error this way from the end user on get requests)?

Can I do it in the Application_Error function? Or in the overridden OnException in HandleErrorAttribute?

EDIT:

I mocked up some code in the BaseController I created:

protected override void OnException(ExceptionContext filterContext)
{
    Exception ex = filterContext.Exception;
    SqlException sex = ex as SqlException;

    if (sex != null && sex.Number == 1205)
    {
       Log.Error("Transaction deadlocked with the following exception:");
       Log.Exception(sex);

       //I need to write the logic that refreshes the page here.
    }
    else
    {
       Log.Error("Application error with the following exception:");
       Log.Exception(ex);
    }

    base.OnException(filterContext);
}

I need help on the refresh part.

Answer 1

I would deal with it by overriding the OnException() method of the controller. It would be best if you inherit all your controllers from a custom base one in which the override is done to maintain uniformity and DRYness of the solution.