Submit form with jquery ajax

Question

I\'m trying to learn MVC and one the things I want to do is submit a form to an action in my controller and this action will return the submitted data. Sounds simple but I\'

Answer 1

Basically you are passing javascript object literals directly. So, before you pass data to your controller, it must be in JSON format(because you have specified application/json. see your $.ajax call).
SO, you are missing JSON.stringify()

data: JSON.stringify({
                        PostId: $('.postid').val(),
                        UserName: $('#username').val(),
                        DateCreated: new Date(),
                        CommentText: $('#comment').val()
                    }),

OR

var someObj = {
            PostId: $('.postid').val(),
            UserName: $('#username').val(),
            DateCreated: new Date(),
            CommentText: $('#comment').val()
        };

         $.ajax({
            /// your other code
            data: JSON.stringify(someObj),
            // your rest of the code

        });