How to call a Controller method from javascript in MVC3?

Question

Im using MVC3 architecture, c#.net. I need to compare text box content(User ID) with the database immediately when focus changes to the next field i.e., Password field. So I

Answer 1

You can use RemoteValidation attribute with a server side action on your controller to do it for you all by MVC Unobstrusive javascript and not needed to write a single line JS/Jquery for it.