protected void lbtPriceOrder_Click(object sender, EventArgs e) { if (i == 0) { condition += "order by RoomPrice desc "; ds = room.GetAllList("RoomPrice desc"); DataList1.DataSource = ds; DataList1.DataBind(); i = 1; return; } if (i == 1) { condition += "order by RoomPrice acs "; ds = room.GetAllList("RoomPrice asc"); DataList1.DataSource = ds; DataList1.DataBind(); i = 0; return; } }