I was using form serialize() to submit user input data using the ajax post method to the controller in ASP.NET 5 application but data was not passing to the controller. Later on, I have found the solution to this issue. Let’s go for the resolution.

Code of ajax post method is:

<script type="text/javascript">
    function submitStudent() {
        var data = $("#studentForm").serialize();
        console.log(data);
        alert(data);
        $.ajax({
            type: 'POST',
            url: '/Home/CreateStudent',
            dataType: 'json',
            contentType: 'application/json; charset=utf-8',
            data: JSON.stringify(data),
            success: function (result) {
                console.log('Data received: ');
                console.log(result);
            }
        })
    }
</script>

If we are using .serialize() in form submit event

i.e. $('#yourForm').serialize()

Then we have to remove

          contentType: ‘application/json; charset=utf-8’, 

Reason is when we use .serialize() this generates the data in query string format. It needs the default contentType. Default content type is: contentType: ‘application/x-www-form-urlencoded; charset=UTF-8’, so it is optional, you can remove it or can use as depicted in below code.

<script type="text/javascript">
    function submitStudent() {
        var data = $("#studentForm").serialize();
        console.log(data);
        alert(data);
        $.ajax({
            type: 'POST',
            url: '/Home/CreateStudent',
            dataType: 'json',
            contentType: 'application/x-www-form-urlencoded; charset=UTF-8', // when we use .serialize() this generates the data in query string format. this needs the default contentType (default content type is: contentType: 'application/x-www-form-urlencoded; charset=UTF-8') so it is optional, you can remove it
            data: JSON.stringify(data),
            success: function (result) {
                console.log('Data received: ');
                console.log(result);
            }
        })
    }
</script>

I hope, you will be able to resolve your form serialization and data sending issue from the user side to the controller.

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