public ActionResult viewdoctor()
        {
            doctormanager         dt  = new doctormanager();
            List <Adddoctormodel> adm = dt.readstudents();

            return(View(adm));
        }
        public ActionResult updatedoctor(int SID)
        {
            doctormanager  dt  = new doctormanager();
            Adddoctormodel doc = dt.Getupdatedoc(SID);

            if (doc == null)
            {
                ViewBag.Message = "data not found";
                return(RedirectToAction("doc"));
            }
            else
            {
                return(View(doc));
            }
        }