private void frmSelectPhong_Load(object sender, EventArgs e)
        {
            clbDsPhong.Items.Clear();
            List <RoomEntity> Dsphong = XuLyXml.GetAllRooms();

            foreach (RoomEntity ph in Dsphong)
            {
                string st = ph.RoomName + "(" + ph.Seat + ")";
                clbDsPhong.Items.Add(st);
            }
            SetData(phong);
        }
 public void frmQlPhongHoc_Load(object sender, EventArgs e)
 {
     LoadData(XuLyXml.GetAllRooms());
 }