How do I set ExceptionHandled on an ActionExecutedContext

I'm using an ActionFilter (that I did not write) on an action method. The action method itself calls a SaveOrUpdate() method on a repository. If that SaveOrUpdate() method fails with an exception I would like to set the Exce开发者_如何转开发ptionHandled property of ActionExecutedContext from within the action method so the OnActionExecuted method will not attempt to commit the transaction.

How can I do that? Is this the right way to approach this or should I be doing this differently?

Here's the code in OnActionExecuted of the filter:

public  void OnActionExecuted(ActionExecutedContext filterContext)
    {
        var thereWereNoExceptions = filterContext.Exception == null || filterContext.ExceptionHandled;
        if (filterContext.Controller.ViewData.ModelState.IsValid && thereWereNoExceptions)
        {
            _transaction.Commit();
        }
        else
        {
            _transaction.Rollback();
        }
    }

You don't need to do this. Just throw an exception:

[MyFilter]
public ActionResult Index()
{
    throw new Exception("foo");
}

and the else statement of your OnActionExecuted filter will be hit and rollback the transaction.

Here is the code I use to handle custom errors.

filterContext.ExceptionHandled = true;
filterContext.HttpContext.Response.Clear();
filterContext.HttpContext.Response.StatusCode = 500;
filterContext.HttpContext.Response.TrySkipIisCustomErrors = true;