求一个无限分类显示方法。

private void Loadlist(string id, int count)
    {
        //string sql = "select * from cms_column where pid=" + id + " order by id asc";

        DataView dv = new DataView(SQLhelp.GetDtaTale("select * from cms_column where pid=" + id + " order by id asc"));

        foreach (DataRowView drv in dv)
        {
            //形成表格
            //Literal1.Text += "<tr><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;" + drv["id"].ToString() + "</td><td>" + Felgefu(count) + drv["cl_column"].ToString() + "<td>删除 |  修改</td></tr>";（此处不知道如何来 添加事物处理）
           
            //如果用 Repeater的话 在次如何写接收数据？              

            //形成下拉列表
            ListItem li = new ListItem(Felgefu(count) + drv["cl_column"].ToString(), drv["id"].ToString());
            DDL.Items.Add(li);

            //再次遍历
            Loadlist(drv["id"].ToString(), count + 1);
        }
      
    }

private string Felgefu(int count)
    {
        string Returnwords = string.Empty;
        if (count == 0)
        {
            Returnwords = "";
        }

        else
        {
            Returnwords = ("　├").PadLeft(count, '　');
        }
        return Returnwords;



    }