//Load public int LoadDangKyHoatDong() { List<DANGKYHOATDONG_get_MaHoatDongResult> lt = new List<DANGKYHOATDONG_get_MaHoatDongResult>(); BUSDangKyHoatDong BUSDangKyHoatDong = new BUSDangKyHoatDong(); lt = BUSDangKyHoatDong.SelectDANGKYHOATDONGs_HoatDong(int.Parse(Request.QueryString["id"])); if (lt.Count > 0) { this.GridViewDangKyHoatDong.DataSource = lt; GridViewDangKyHoatDong.DataBind(); PanelDanhSach.Visible = true; PanelMessage.Visible = false; return lt.Count; } else { PanelDanhSach.Visible = false; PanelMessage.Visible = true; return 0; } }