i have problem i can't pass params to backend use fech or ajax call , but from another PC i can pass params, here is a sample from code

Backend :

    [HttpPost]
    public IActionResult SubProducat(int Pid)
    {
        List<Lookup> SubProducat = new BAL.Lookups.LookupBL().SubProducatByProduct(Pid);
        return Json(SubProducat);
    }

** Here the Pid always zero **

JavaScript Code:

   $.ajax({
                async: false,
                type: "POST",
                url: '@Url.Action("GetSubProducat", "Notification")',
                data: JSON.stringify({ Pid: $("#ProducatId").val() }),
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (data) {
                    var returnedData = $.parseJSON(data);
                    $('#SubProducatId').empty();
                    $('#SubProducatId').append("<option value='' selected>---Select---</option>");
                    $.each(returnedData, function (key, value) {
                        $('#SubProducatId').append(
                            '<option value="' + value.ID + '">'
                            + value.NameEN +
                            '</option>');
                    });
                },
                error: function (Edata) { alert(Edata); }
            });