<asp:Panel ID="Panel2" runat="server" Height="600px" ScrollBars="Auto">                        <asp:TreeView ID="TreeView1" runat="server" ForeColor="Black" OnTreeNodeExpanded="TreeView1_TreeNodeExpanded" OnSelectedNodeChanged="TreeView1_SelectedNodeChanged">                            <LeafNodeStyle HorizontalPadding="3px" />                            <ParentNodeStyle HorizontalPadding="3px" />                            <RootNodeStyle HorizontalPadding="3px" />                            <SelectedNodeStyle ForeColor="#009933" />                        </asp:TreeView>                    </asp:Panel>

  #region wsw更改树的加载方式    private void LoadNewTree()    {        DataTable dtp = pagBLL.GetList(" superfuncid=0  order by sort asc").Tables[0];        if (dtp.Rows.Count > 0)        {            //首先清除树型控件内的结点            this.TreeView1.Nodes.Clear();            for (int i = 0; i < dtp.Rows.Count; i++)            {                //实例出一个结点                TreeNode Node = new TreeNode();                Node.Text = dtp.Rows[i]["funcname"].ToString();                Node.Value = dtp.Rows[i]["pagefuncid"].ToString();                Node.ToolTip = dtp.Rows[i]["funcurl"].ToString();                Node.ImageUrl = "../../" + dtp.Rows[i]["imageurl"].ToString();                 this.TreeView1.Nodes.Add(Node);//增加父节点，这时直接往树TreeView1上加                this.LoadAddSign(Node.ChildNodes,Convert.ToInt32(dtp.Rows[i]["pagefuncid"].ToString()));//wsw更改                TreeView1.CollapseAll();            }        }    }    /// <summary>    /// 用于加载显示 树形控件 +号的,加载下面的一个节点。    /// </summary>    /// <param name="Conn"></param>    /// <param name="tn"></param>    /// <param name="DeptId"></param>    private void LoadAddSign( TreeNodeCollection tn, int DeptId) //wsw更改    {        DataTable table = pagBLL.GetList(" superfuncid=" + DeptId + "  order by sort asc").Tables[0];        if (table.Rows.Count > 0)        {            //加载"一个"1级节点，就是为了显示 + 号            tn.Add(new TreeNode());        }    }    /// <summary>    /// 点击 + 号是节点展开事件    /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    protected void TreeView1_TreeNodeExpanded(object sender, TreeNodeEventArgs e)    {        TreeNode node = e.Node;        if (node.Expanded == true)        {            string bm = e.Node.Value.ToString();//wsw更改            DataTable table = pagBLL.GetList(" superfuncid=" + bm + "  order by sort asc").Tables[0];            node.ChildNodes.Clear(); //清除之前加载的空节点。            if (table.Rows.Count > 0)            {                for (int i = 0; i < table.Rows.Count; i++)                {                    TreeNode Node = new TreeNode();                    Node.Text = table.Rows[i]["funcname"].ToString();                    Node.Value = table.Rows[i]["pagefuncid"].ToString();                    Node.ToolTip = table.Rows[i]["funcurl"].ToString();                    Node.ImageUrl = "../../" + table.Rows[i]["imageurl"].ToString();                    node.ChildNodes.Add(Node);//增加父节点，这时直接往树TreeView1上加                    this.LoadAddSign(Node.ChildNodes, Convert.ToInt32(table.Rows[i]["pagefuncid"].ToString()));//wsw更改                }            }        }    }    #endregion