public bool ThemChiTietLoaiPhong(ChiTietLoaiPhong chiTietLoaiPhong)
        {
            SqlConnection con     = new SqlConnection(db.Connection.ConnectionString);
            SqlCommand    command = new SqlCommand("insert into ChiTietLoaiPhong values(@maTienNghi, @maLoai, @soLuong)", con);

            command.Parameters.AddWithValue("@maTienNghi", chiTietLoaiPhong.MaTienNghi);
            command.Parameters.AddWithValue("@maLoai", chiTietLoaiPhong.MaLoai);
            command.Parameters.AddWithValue("@maLoai", chiTietLoaiPhong.SoLuong);
            con.Open();
            int result = command.ExecuteNonQuery();

            con.Close();
            if (result <= 0)
            {
                return(false);
            }
            else
            {
                return(true);
            };
        }
 public bool CapNhatChiTietLoaiPhong(ChiTietLoaiPhong chiTietLoaiPhong)
 {
     XoaChiTietLoaiPhong(chiTietLoaiPhong.MaTienNghi, chiTietLoaiPhong.MaLoai);
     ThemChiTietLoaiPhong(chiTietLoaiPhong);
     return(true);
 }