public bool add_sv_statistic(string id, string name, string date, string status, string note)
 {
     sv_diemdanh_class sv_dd = new sv_diemdanh_class();
     try
     {
         if (id != "" && name != "" && date != "" && status != "" && note != "")
         {
             
                 svtext_class sv = new svtext_class();
                 sv.diemdanhsv(id, name, date, status, note);
                 return true;
         }
         return false;
     }
     catch (Exception)
     {
         return false;
     }
 }
 public IActionResult svthongke()
 {
     sv_diemdanh_class sv_dd = new sv_diemdanh_class();
     ViewData["lst_sv_diemdanh"] = sv_dd.ReadList();
     return View();
 }