private void cboCounty_SelectedIndexChanged(object sender, EventArgs e) { DataSet ds = new DataSet(); ds = Property.getJustTown(ds, cboCounty.SelectedItem.ToString()); for (int i = 0; i < ds.Tables["ss"].Rows.Count; i++) { cboTown.Items.Add(ds.Tables[0].Rows[i][0].ToString()); } lblTown.Visible = true; cboTown.Visible = true; btnSearch.Visible = true; }