动态添加tab(ext中的treePanel)

 <form id="form1" runat="server">    
    <ext:ResourceManager ID="ResourceManager1" runat="server">
    </ext:ResourceManager>
      
    <ext:Viewport ID="Viewport1" runat="server" Layout="border">
        <Items>
            <ext:Panel ID="Panel1" runat="server"   Height="60" Region="North"   >       
                  <Content>            
        <table width="100%" border="0" id="header" bgcolor="#fefb86" cellpadding="0" cellspacing="0">
        <tr>
            <td align="left">
                <img src="Images/banner1.jpg" alt=""/ ></td>
            <td align="right" valign="bottom"  style=" font-size:12px; text-align: right;">
                 <span>
                 <image src="images/user.png" /><%=username%>&nbsp;&nbsp;
                 <image src="images/timer.png" width="14" height="16"/> <%=sj%>&nbsp;
                
                     <ext:ImageButton ID="ImageButton_Logout" runat="server" ImageUrl="Images/exit.gif" >
                               
                                <DirectEvents>
                                    <Click OnEvent="Button_Logout_Click">
                                        <Confirmation ConfirmRequest="True" Title="确认登出" Message="您确定登出本系统吗?" />
                                    </Click>
                                </DirectEvents>
                                <ToolTips>
                                    <ext:ToolTip ID="ToolTip1" runat="server" Title="退出系统" Cls="tooltip1" />
                                </ToolTips>
                            </ext:ImageButton></span>
            </td>
            <td align="right">
            <img src="images/banner2.jpg"  alt=""/></td>
        </tr>
    </table>
         </Content>
            </ext:Panel>         
             <ext:TreePanel   runat="server" 
                    ID="TreePanel1"                  
                    Region="West"
                    Width="200"
                    Title="菜单列表"
                    Icon="ChartOrganisation">           
                    <Listeners>
                        <ItemClick Handler="if (record.data.href) { e.stopEvent(); loadPage(#{Pages}, record); }" />
                    </Listeners>
                  </ext:TreePanel>
             <ext:TabPanel
                    ID="Pages"
                    runat="server"
                    Region="Center"
                    EnableTabScroll="true"
                    LayoutOnTabChange="true"
                    />     
    </Items>
    </ext:Viewport>    
    </form>

   <script type="text/javascript">
               var loadPage = function (tabPanel, record) {

                   var tab = tabPanel.getComponent(record.getId());

                   if (!tab) {
                       tab = tabPanel.add({
                           id: record.getId(),
                           title: record.data.text,
                           closable: true,
                           loader: {
                               url: record.data.href,
                               renderer: "frame",
                               loadMask: {
                                   showMask: true,
                                   msg: "Loading " + record.data.text + "页面"
                               }
                           },
                           autoScroll: true
                       });
                   }

                   tabPanel.setActiveTab(tab);
               };
    </script>

一个根节点

  Node node = new Node();
                node.Text = "所有菜单";
                TreePanel1.Root.Add(node);

 BindTreeView(node, "",  dtAll);   

下面都是子节点，

   protected void BindTreeView(Node treeNode, string parentID, DataTable dtAll)
    {
        Node fnode;
        DataRow[] drs = dtAll.Select("fatherID='" + parentID + "'", "menuID");
        {
            foreach(DataRow dr in drs)
            {
                //判断如果url为空-->跟节点继续
                if ( dr["url"].ToString() == "")
                {
                    fnode = new Node();
                    fnode.Text = dr["menuName"].ToString().Trim();
                    fnode.NodeID = string.Concat("Node_", dr["menuID"].ToString().Trim());
                    fnode.Leaf = false;
                    treeNode.Children.Add(fnode);
                    BindTreeView(fnode, dr["menuid"].ToString(), dtAll);
                }
                else
                {
                    Node node01 = new Node();
                    node01.Text = dr["menuName"].ToString().Trim();
                    node01.NodeID = string.Concat("Node_", dr["menuID"].ToString().Trim());
                    node01.Leaf = true;
                    node01.Href = dr["url"].ToString().Trim();
                    treeNode.Children.Add(node01);
                }
            }
           
        }
    }

这样,左边是一个treeview样式，但是父节点下也必须有子节点，否则会弹出一个框。