public ActionResult Datatable(JDatatableViewModel model)
        {
            if (!Request.IsAjaxRequest())
            {
                return(RedirectToAction("Index"));
            }

            JDatatableResponse resp = new JDatatableResponse();

            SalesmanBusiness business = new SalesmanBusiness();

            business.SetUserAuth(ViewBag.UserAuth);

            resp = business.GetDatatableByQuery(model);

            return(new MyJsonResult(resp, JsonRequestBehavior.AllowGet));
        }