Preventing action in web application from being called twice (ASP.NET MVC)

Question

What is the best way to make sure an ASP.NET MVC action is not called twice (i.e. if the user clicks on a button twice in quick succession)? On most of our screens, it's not a big deal if it happens ... but on a few it causes havoc (like paying people multiple times instead of just once).

Answer 1

You could disable the submit button using javascript. For example with jQuery:

$(function() {
    $('form').submit(function() {
        $(':submit, :image', this).attr('disabled', 'disabled');
    });
});