How to stop Form submit if the validation fails [duplicate]

Question

UPDATE: my question is more about How to prevent the form submit if the validation fails

the link does not solve my problem

just re-iterate what I'm doing: I have a form with bunch of input fields and when the user hit the submit button it validate form using attribute required="required" if the form validation fails THEN I want to stop submitting the form as you see the javascript it show the div when the user submit the form.

Hope this clears up.

END UPDATE

How can I stop the form submit to fire if the form validation fails?

<input class="form-control" data-val="true" id="SerialNumber" name="SerialNumber" required="required" type="text">

<button type="submit" name="rsubmit" class="btn btn-success">Submit</button>

 //loading message:
 $("form").submit(function (e) {
     $("#loading").show();
 }); 

Answer 1

You need to do two things if validation fails, e.preventDefault() and to return false.

For your example, with the input given, the pseudo code might be the next:

$("form").submit(function (e) {
   var validationFailed = false;
   // do your validation here ...
   if (validationFailed) {
      e.preventDefault();
      return false;
   }
}); 

Answer 2

I able to fixed the problem:

First add the ref on your page:

<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.9/jquery.validate.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/mvc/3.0/jquery.validate.unobtrusive.min.js"></script>

then do this check:

        $("form").submit(function () {
            if ($(this).valid()) {  //<<< I was missing this check
                $("#loading").show();
            }
        });

Answer 3

Write your validation code on onsubmit handler of your form like this

<form onsubmit="return Validation()">
    <input class="form-control" data-val="true" id="SerialNumber" name="SerialNumber" required="required" type="text">

    <button type="submit" name="rsubmit" class="btn btn-success">Submit</button>

    <script>
        function Validation(){
        //Do all your validation here
        //Return true if validation is successful, false if not successful
        //It will not submit in case of false.
        return true or false;
        }
    </script>
</form>