private void chinhsuadn(LyLichXinViec _l1xivc)
 {
     using (var db1 = new TroGiupViecLamEntities())
     {
         db1.Entry(_l1xivc).State = System.Data.Entity.EntityState.Modified;
         db1.SaveChanges();
     }
 }
 private bool capnhatcv(LyLichXinViec _ll23xv)
 {
     try
     {
         using (var db1 = new TroGiupViecLamEntities())
         {
             //  db1.Entry(_ll23xv).State =EntityState.Modified;
             string mavc = dgrDSLL.SelectedRows[0].Cells[0].Value.ToString();
             //  db1.LyLichXinViecs.Attach();
             db1.Entry(_ll23xv).State = _ll23xv.maCV == mavc ? EntityState.Added : EntityState.Modified;
             db1.SaveChanges();
             return(true);
         }
     }
     catch (Exception)
     {
         return(false);
     }
 }