private void btnitem_next_Click(object sender, EventArgs e) { nxt = nxt + 25; phg = phg + 25; DataTable dtcheck = blord.get_item_by_category_id2(Convert.ToInt32(lblcateogry_item.Text)); if (nxt <= dtcheck.Rows.Count) { item_by_category_id(nxt, phg); btn_item_preview.Show(); } if (phg >= dtcheck.Rows.Count) { btnitem_next.Hide(); } }