asp.net TreeView与XML三步生成列表树

刚我在做Tree view 绑定时自己摸索了一下，网上有人说TreeView绑定数据源，用什么递归绑定啥的，我不想看了，就自己试着写了一个
我是这样做的，如果有什么问题请大神指导，我是菜鸟额..
1:页面TreeView 叫tvFunction
2:新建 adminFunction.xml

3：页面绑定

            foreach (XmlNode node in root.ChildNodes)
            {
                //获取父节点的信息显示(轻狂-书生)
                XmlElement x1 = node as XmlElement;
                string name = x1.GetAttribute("name");
                string url = x1.GetAttribute("url");
                TreeNode tn = new TreeNode();
                tn.Text = name;
                tn.NavigateUrl = url;
                foreach (XmlNode subnode in x1.ChildNodes)
                {
                    XmlElement subxmlEmt = subnode as XmlElement;
                    string subname = subxmlEmt.GetAttribute("name");
                    string suburl = subxmlEmt.GetAttribute("url");
                    TreeNode subtn = new TreeNode();
                    subtn.Text = subname;
                    subtn.NavigateUrl = suburl;
                    tn.ChildNodes.Add(subtn);

                }
                tvFunction.Nodes.Add(tn);

            }
        }
</div>
4：显示效果