ListView 数据加载

private void button1_Click(object sender, EventArgs e)
        {
            //string sql = "select * from type";
            SqlConnection con = new SqlConnection("server=XXXX;pwd=XXXXX;uid=sa;database=web1");
            con.Open();
            SqlCommand com = new SqlCommand("select * from type", con);
            SqlDataReader dr = com.ExecuteReader();
            while (dr.Read())
            {
                ListViewItem lv = new ListViewItem(dr[0].ToString());
                lv.SubItems.Add(dr[1].ToString());
                lv.SubItems.Add(dr[2].ToString());
                listView1.Items.Add(lv);
            }
            dr.Close();
        }