protected void gvDanhSachHoatDong_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
ThongKeBUS tkBUS = new ThongKeBUS();
TableCell cell = gvDanhSachHoatDong.Rows[e.RowIndex].Cells[0];
tkBUS.XoaHoatDong(Convert.ToInt32(cell.Text));
FilGVDanhSachHoatDong();
}