public BUS_BanHang()
{
this._dal_KhachHang = new DAL_KhachHang();
this._dal_NhanVien = new DAL_NhanVien();
this._dal_CTHoaDon = new DAL_CTHoaDon();
this._dal_HDBanHang = new DAL_HDBanHang();
this._dal_PhieuThanhToan = new DAL_PhieuThanhToan();
this._dal_LoHang = new DAL_LoHang();
}
public DAL_LoHang()
{
this.connection = new Connection();
this._cthd = new DAL_CTHoaDon();
}