问题
I am making an ajax call to my controller which is going to perform a long operation. The operation can fail for many reasons or succeed. If I want to force the failure code of my ajax call to execute ("error"), what do I need to do in my controller before returning? Just throw an exception?
回答1:
Throwing an exception will lead to status code = 500 which will invoke the error handler, so it should be enough.
来源：https://stackoverflow.com/questions/4002795/asp-net-mvc-intentional-ajax-failure