public List<Phong_KhachHangInfo> Phong_KhachHang_GetItems(int HoaDonID, int PhongID)
 {
     HoaDon_KhachHangDAL doit = new HoaDon_KhachHangDAL();
     return doit.Phong_KhachHang_GetItems(HoaDonID, PhongID);
 }
 public void Phong_KhachHang_Delete(int HoaDonID, int KhachHangID)
 {
     HoaDon_KhachHangDAL doit = new HoaDon_KhachHangDAL();
     doit.Phong_KhachHang_Delete(HoaDonID, KhachHangID);
 }
 public void HoaDon_KhachHang_EditPhong(int HoaDonID, int PhongID)
 {
     HoaDon_KhachHangDAL doit = new HoaDon_KhachHangDAL();
     doit.HoaDon_KhachHang_EditPhong(HoaDonID, PhongID);
 }
 public List<Phong_KhachHangInfo> Phong_KhachHang_DatPhong(int PhongID)
 {
     HoaDon_KhachHangDAL doit = new HoaDon_KhachHangDAL();
     return doit.Phong_KhachHang_DatPhong(PhongID);
 }
 public void HoaDon_KhachHang_Add(string LoaiHoaDon,int KhachHangId, int PhongID, string NgayBatDau, int GioBatDau, int PhutBatDau, int NgayBatDau_So, int ThangBatDau, int NamBatDau, string NgayKetThuc)
 {
     HoaDon_KhachHangDAL doit = new HoaDon_KhachHangDAL();
     doit.HoaDon_KhachHang_Add(LoaiHoaDon, KhachHangId, PhongID, NgayBatDau, GioBatDau, PhutBatDau, NgayBatDau_So, ThangBatDau, NamBatDau, NgayKetThuc);
 }