MVC controller is being called twice

Question

I have a controller that is being called twice from an ActionLink call.

My home page has a link, that when clicked calls the Index method on the Play controller. An

Answer 1

In my case, I was using a Partial View (so no Form tags) and using an on click handler in JQuery to call a method in the controller via Ajax. But I had declared the button the handler was attached to as type Submit. I forgot to pass in e to my handler function so as to call e.PreventDefault()!! So the Controller method was being called twice - once from an ajax call and once for Submit. The 2nd time around the parameters were null. This caused me so much grief. Such a small thing. So small that it was easily overlooked. Hope this helps someone else.