public Result<bool> insertDiem(string masv, string mamon, string diem)
 {
     Diem_ctrl temp = new Diem_ctrl();
     return temp.insert_diem(masv, mamon, diem);
 }
 public Result<List<Diem_ett>> selectByFieldsDiem(string inputName, string how)
 {
     Diem_ctrl temp = new Diem_ctrl();
     return temp.select_by_fields(inputName, how);
 }
 public Result<bool> deleteDiem(string masv, string mamon)
 {
     Diem_ctrl temp = new Diem_ctrl();
     return temp.delete_diem(masv, mamon);
 }
 public Result<List<Diem_ett>> selectAllDiem()
 {
     Diem_ctrl temp = new Diem_ctrl();
     return temp.select_all_diem();
 }