How to crop image using croppie js and upload in asp.net core

Question

I use coppie js in asp.net core 6 but when sned models item blob is null send to my controller but a few data send it is ok?? plz help me that why can not send more data to controller?

enter image description here

    $('#btnupload').on('click', function ()
{
    event.preventDefault();
            var btn = $(this);
            var $form = btn.closest("form");


      basic.croppie('result', 'blob').then(function (blob)
    {
        var myform=$('#frmData')[0];
        var formData = new FormData(myform);
        formData.append('filename', 'FileName.jpeg');
        formData.append('blob', blob);
        var myAppUrlSettings =
        {
            MyUsefulUrl: '@Url.Action("Create", "ItemCategory")'
        }



        var request = new XMLHttpRequest();
        request.open('POST', myAppUrlSettings.MyUsefulUrl);
        request.send(formData);
        request.onreadystatechange = function () { // Call a function when the state changes.
            if (this.readyState === XMLHttpRequest.DONE && this.status === 200)
            {
                var response = JSON.parse(request.responseText);

                if (response.message == "OK")
                {
                     
                }

            }
        }
    });


});