private void Load_Danh_Sach_Phong()
        {
            DataGridDSPhong.Items.Clear();

            string dsPhong = nghiep_vu.Load_DsPhong(DTO.NguoiDung.GetND().Tk,
                                                    cbxDanhMucPhong.SelectedValue.ToString());

            XmlDocument PhongDoc = new XmlDocument();

            PhongDoc.LoadXml(dsPhong);

            XmlNodeList PhongList = PhongDoc.SelectNodes("/LOAIPHONG/PHONG");

            foreach (XmlNode item in PhongList)
            {
                XmlElement phong = item as XmlElement;

                TmpPhong PhongObject = new TmpPhong(phong.GetAttribute("MAPHONG").ToString(),
                                                    phong.GetAttribute("TENLOAIPHONG").ToString(), phong.GetAttribute("SONGUOITOIDA").ToString()
                                                    , phong.GetAttribute("TINHTRANGPHONG").ToString());

                DataGridDSPhong.Items.Add(PhongObject);
            }
        }
        private void Load_Danh_Sach_Phong()
        {
            DataGridDSPhong.Items.Clear();
            
            string dsPhong = nghiep_vu.Load_DsPhong(DTO.NguoiDung.GetND().Tk,
                     cbxDanhMucPhong.SelectedValue.ToString());

            XmlDocument PhongDoc = new XmlDocument();
            PhongDoc.LoadXml(dsPhong);

            XmlNodeList PhongList = PhongDoc.SelectNodes("/LOAIPHONG/PHONG");

            foreach (XmlNode item in PhongList)
            {
                XmlElement phong = item as XmlElement;

                TmpPhong PhongObject = new TmpPhong(phong.GetAttribute("MAPHONG").ToString(),
                    phong.GetAttribute("TENLOAIPHONG").ToString(), phong.GetAttribute("SONGUOITOIDA").ToString()
                    , phong.GetAttribute("TINHTRANGPHONG").ToString());

                DataGridDSPhong.Items.Add(PhongObject);
            }
        }