public NhanVienBLL() { qt = new QLQTDataContext(); }
public LoaiThuocBLL() { qt = new QLQTDataContext(); }
public BacSiBLL() { qt = new QLQTDataContext(); }
public QuanLyBLL() { qt = new QLQTDataContext(); }
public BenhNhanBLL() { qt = new QLQTDataContext(); }
public NccBLL() { qt = new QLQTDataContext(); }
public TaiKhoanBLL() { this.qt = new QLQTDataContext(); }
public CTHoaDonBLL() { qt = new QLQTDataContext(); }
public DonThuocBLL() { qt = new QLQTDataContext(); }