//Load
        public int LoadDangKyMuonPhong()
        {
            List<DANGKYMUONPHONG> lt = new List<DANGKYMUONPHONG>();

            BUSDangKyMuonPhong BUSDangKyMuonPhong = new BUSDangKyMuonPhong();

            lt = BUSDangKyMuonPhong.SelectDANGKYMUONPHONGsAll();
            if (lt.Count > 0)
            {
                this.GridViewDangKyMuonPhong.DataSource = lt;
                GridViewDangKyMuonPhong.DataBind();
                PanelDanhSach.Visible = true;
                PanelMessage.Visible = false;
                return lt.Count;
            }
            else
            {
                PanelDanhSach.Visible = false;
                PanelMessage.Visible = true;
                return 0;
            }
        }