树形菜单求助 ，不知道从何下手。求大咖们帮帮讲讲思路 要是有代码就更好了。

Question

左边为国家的省份，子菜单为省份的市级单位，右边卫市级单位的区。数据是从数据库区的。括号内的数字为选中的个数。从数据库去出来的数据类似于 id:01, name:黑龙江省,市区的LIST.
在前台页面怎遍历这个树形菜单还可以联动 求助大咖们
图片地址：http://a.hiphotos.bdimg.com/album/s%3D1000%3Bq%3D90/sign=3cccf467caef7609380b9d9f1eed98bd/faedab64034f78f0c70e6a0978310a55b2191cc6.jpg

Answer 1

private void NavigationTools()//导航栏父节点
{

    DataSet ds = new DataSet();
    ds = qqr.BusinessFunctionsTreeViewSelectBLLL();
    if (ds.Tables[0].Rows.Count > 0)
    {
        foreach (DataRow dr in ds.Tables[0].Rows)
        {
            {
                TreeNode menuNod = new TreeNode();
                TreeView bt = new TreeView();
                menuNod.Text = dr["CT_BusinessFunctionTest_Title"].ToString();
                menuNod.Value = dr["CT_BusinessFunctionTest_id"].ToString();
                menuNod.ImageUrl = dr["CT_BusinessFunctionTest_URL"].ToString();
                bt.ExpandImageUrl = dr["CT_BusinessFunctionTest_URL"].ToString();
                bt.CollapseImageUrl = dr["CT_BusinessFunctionTest_URL"].ToString();
                menuNod.SelectAction = TreeNodeSelectAction.Expand;
                qht.BusinessFunctionTest_id = Convert.ToInt32(dr["CT_BusinessFunctionTest_id"].ToString());
                TreeView3.Nodes.Add(menuNod);

                ChildNodes(menuNod);

            }
        }
    }
}
private void ChildNodes(TreeNode ds)//导航栏子节点
{
    DataSet dhz = new DataSet();
    dhz = qqr.BusinessFunctionsTreeViewSubSelectBLL(qht);
    if (dhz.Tables[0].Rows.Count > 0)
    {
        foreach (DataRow odr in dhz.Tables[0].Rows)
        {
            TreeNode menunode = new TreeNode();
            menunode.Text = odr["CT_BusinessFunctionTest_Title"].ToString();
            menunode.Value = odr["CT_BusinessFunctionTest_id"].ToString();
            //menunode.NavigateUrl = odr["CT_Navigation_URL"].ToString();
            //menunode.NavigateUrl = odr["CT_Navigation_URL"].ToString();
            ds.ChildNodes.Add(menunode);
        }
    }
}


    旁边在加一个 <iframe>控件就可以实现了 希望对你有用