listview 无法绑定 数据无法显示
代码：
     private void test_Load(object sender, EventArgs e)  //放到窗体load事件
        {
            Open();
            string sql = "select  * from tyq_jldxx";
            try
            {
                 OdbcCommand cmd = new OdbcCommand(sql, con);
                 OdbcDataReader dr = cmd.ExecuteReader();
                 listView1.View = View.Details;
                 listView1.FullRowSelect = true;
               

                 while (dr.Read())
                 {
                     ListViewItem lv = new ListViewItem();
                     lv.SubItems[0].Text = dr["name_jld"].ToString();
                     lv.SubItems.Add(dr["name_cz"].ToString());
                     listView1.Items.Add(lv);
                
                 }
                 dr.Close();
            }
运行后listview没显示任何数据，请高手帮忙，谢谢！