http://ttyp.cnblogs.com/archive/2005/06/01/165621.html
http://community.csdn.net/Expert/topic/4300/4300558.xml?temp=.7716028

在web.config加入以下节

 

    <configSections>
        <section name="MicrosoftWebControls" type="System.Configuration.NameValueSectionHandler, System, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />    
    </configSections>
 
    <MicrosoftWebControls>
        <add key="CommonFiles" value="/web/treepath/"></add>        
    </MicrosoftWebControls>

注意:configSections一定要放在第一个子节最前面.

剪切默认网站的webctrl_client目录到虚拟目录web/treepath/下,运行程序,树型界面出现了,只是前面的加减号出现问题,再右键查看WEB代码,发现SystemImagesPath属性还是指到webctrl_client目录下,看了SystemImagesPath的代码,把treeview控件的SystemImagesPath设置为空,再次运行程序,OK!全部通过,treeview的图片目录再也不需要依赖默认网站的图片目录了,打包也变的方便了

3.客户端操作TreeView带CheckBox的好例子（1）－－选择 /取消父节点后其所有子节点自动选择 /取消。不过里面有点小问题要注意:

(1)就是如何初始化已经选择的节点:注意要从客户端初始化的(把选择的节点放在客户端一个隐藏域里通过JS初始化).如果你在服务器端初始化了将无法在客户端修改它的状态.

(2)如何获得客户端设置的节点:在客户端改变了选择状态(node.setAtrribute("check","ture"))后,通过服务器端是无法获得选择的值的,也只能在客户端获得它(通过一个input type="hiiden" runat="server"来保存选择的值).
上面两个问题都是参考了下面的代码完成的.

两个客户端操作TreeView节点CheckBox的小例子 (转江雨.net)(自动选择子节点)
下面是修改后详细代码:

<script language="javascript">

            //初始化选中节点
            function initchecknode()
            {
                //获得需要初始化选择状态的节点的字符串.
                var selectedNodes = document.all.checkedNodes.value;
                var arrayNodes = new Array();
                arrayNodes = selectedNodes.split(",");
                var AllRootNode=new Array();
                AllRootNode=document.getElementById("TreeView1").getChildren();
                //初始化选择的节点
                findAndCheckedNodes(AllRootNode,arrayNodes);
            }

            //根据已选择的节点的字符串初始化选择的节点
            function findAndCheckedNodes(NodeArray,nodeDatas)
            {
                //alert(NodeArray.length);
                 if(parseInt(NodeArray.length)==0)
                 {
                    return;
                }
                else
                {
                    for(var i=0;i<parseInt(NodeArray.length);i++)
                    {
                        var cNode,nodeData;
                        cNode=NodeArray[i];
                        ////如果该节点在nodeDatas里则初始化checked = true;
                        nodeData = cNode.getAttribute("NodeData");
                        for(var j=0;j<nodeDatas.length;j++)
                        {
                            if(nodeDatas[j] == nodeData)
                            {
                                cNode.setAttribute("checked","true");
                                break;
                            }
                        }
                        //如果有子节点,则继续递归
                        if(parseInt(cNode.getChildren().length)!=0)
                        findAndCheckedNodes(cNode.getChildren(),nodeDatas);    
                    }
                }
            }
            
            //节点的oncheck事件
            function tree_oncheck(tree)
            {
                var node=tree.getTreeNode(tree.clickedNodeIndex);
                var Pchecked=tree.getTreeNode(tree.clickedNodeIndex).getAttribute("checked");
                setcheck(node,Pchecked);
                document.all.checkedNodes.value="";
                document.all.unchecked.value="";
                FindCheckedFromNode(TreeView1);
            }
            //设置子节点选中
            function setcheck(node,Pc)
            {
                var i;
                var ChildNode=new Array();
                ChildNode=node.getChildren();
                 
                if(parseInt(ChildNode.length)==0)
                    return;
                else
                {
                    for(i=0;i<ChildNode.length;i++)
                    {
                        var cNode;
                        cNode=ChildNode[i];
                        if(parseInt(cNode.getChildren().length)!=0)
                            setcheck(cNode,Pc);
                        cNode.setAttribute("checked",Pc);
                    }
                }
            }
            //获取所有节点状态
            function FindCheckedFromNode(node) 
            {
                var i = 0;
                var nodes = new Array();
                nodes = node.getChildren();
                 
                for (i = 0; i < nodes.length; i++) 
                {
                    var cNode;
                    cNode=nodes[i];
                    if (cNode.getAttribute("checked"))
                        AddChecked(cNode);
                    else
                        AddUnChecked(cNode);
                      
                    if (parseInt(cNode.getChildren().length) != 0 ) 
                    {
                        FindCheckedFromNode(cNode);
                    }
                }
            }
            //添加选中节点
            function AddChecked(node) 
            {
                document.all.checkedNodes.value += node.getAttribute("NodeData");
                document.all.checkedNodes.value += ',';
            }
            //添加未选中节点
            function AddUnChecked(node)
            {
                document.all.unchecked.value += node.getAttribute("NodeData");
                document.all.unchecked.value += ',';
            }
            
        </script>

    <body MS_POSITIONING="FlowLayout" onload="initchecknode()">
        <form id="Form1" method="post" runat="server">
            <FONT face="宋体">
                <TABLE class="main" id="Table1">
                    <TR>
                        <TD></TD>
                        <TD align="center" height="50">权限管理</TD>
                        <TD></TD>
                    </TR>
                    <TR>
                        <TD></TD>
                        <TD>用户名:
                            <asp:label id="lblUserName" runat="server">Label</asp:label></TD>
                        <TD></TD>
                    </TR>
                    <TR>
                        <TD></TD>
                        <TD><iewc:treeview id="TreeView1" runat="server" ExpandLevel="1" SelectExpands="True" SystemImagesPath="/webctrl_client/1_0/treeimages/"
                                ImageUrl="images/fclose.gif" SelectedImageUrl="images/bookmark.gif" ExpandedImageUrl="images/fopen.gif"
                                Target="main" AutoSelect="True" wilth="100%"></iewc:treeview></TD>
                        <TD></TD>
                    </TR>
                    <TR>
                        <TD></TD>
                        <TD align="center" height="50">
                            <asp:button id="BtnSure" runat="server" Text="保存"></asp:button>&nbsp;
                        </TD>
                        <TD></TD>
                    </TR>
                </TABLE>
            <INPUT id="checkedNodes" type="hidden" size="32" runat="server" NAME="checkedNodes"> <!--已经选择的节点每个节点间用","分隔.-->
            <INPUT id="unchecked" type="hidden" size="32">
        </form>
    </body>

主要后台代码:

        
//数据访问实例
protected ClassConn connE = new ClassConn();

private void Page_Load(object sender, System.EventArgs e)
{
    // 在此处放置用户代码以初始化页面
    if ( !IsPostBack)
    {
        TreeView1.Attributes.Add("oncheck","tree_oncheck(this)");
        ViewState["UserId"] = Request.QueryString["id"]+string.Empty;

        //初始化用户名
        lblUserName.Text=connE.GetFieldValue("string","select name from EPM_EmployeeList where id = "+ViewState["UserId"].ToString());
        ViewState["dsTree"] = connE.getDs("select * from EPM_DepartmentList where corpid="+Session["EnterpriseId"].ToString()+" and (type ="+Session["EnterpriseType"].ToString()+" or type=2)  and state=1 order by ShowIndex");
        connE.Close();
        //初始化权限信息    
        InitData();


        
    }
}


/**//// <summary>
/// 初始化权限树.
/// </summary>
/// <param name="nFatherid">父节点的ID</param>
/// <param name="node"></param>
protected void initTree( int nFatherid,TreeNode fatherNode)
{
    DataSet ds = (DataSet)ViewState["dsTree"];
    DataView dv = new DataView(ds.Tables[0]);
    dv.RowFilter = "[parentDeptid] = "+nFatherid;
    
    foreach ( DataRowView Row in dv )
    {
        TreeNode node = new TreeNode();
        if (fatherNode == null)//根节点
        {
            node.Text=Row["name"].ToString();
            node.NodeData = Row["id"].ToString();
            node.CheckBox = true;
            this.TreeView1.Nodes.Add(node);
            //node.Expanded=false;//是否展开,若设置为true 则ExpandLevel="1" 无效
            initTree(Int32.Parse(Row["id"].ToString()),node);//递归
        }
        else
        {
            node.Text = Row["name"].ToString();
            node.NodeData = Row["id"].ToString();
            //node.NavigateUrl = Row["url"].ToString();
            node.CheckBox = true;
            fatherNode.Nodes.Add(node);
            initTree(Int32.Parse(Row["id"].ToString()),node);//递归
        }
    }

}

/**//// <summary>
/// 设置权限的字符串,没个权限间用逗号分隔.
/// </summary>
/// <returns></returns>
private string  InitPowers()
{
    string strPowers = string.Empty;
    string strSql = "select id, DeptID from  EPM_PowerList where EMPid ="+ViewState["UserId"].ToString();
    SqlDataReader reader = connE.getDreader(strSql);
    while(reader.Read())
    {
        if (strPowers.Length == 0)
        {
            strPowers = reader[1].ToString();
        }
        else
        {
            strPowers += ","+reader[1].ToString();
        }
    }
    reader.Close();
    return strPowers;
}

/**//// <summary>
/// 初始化权限树
/// </summary>
private void InitData()
{
    //获得权限字符串
    string strPowers = InitPowers();
    //把权限字符串赋给checkedNodes.
    this.checkedNodes.Value = strPowers;
    //初始化菜单树,使用递归调用.
    this.TreeView1.Nodes.Clear();
    initTree(0,(TreeNode)null);
}



/**//// <summary>
/// 保存权限的设置
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void BtnSure_Click(object sender, System.EventArgs e)
{
    //先删除原来权限的设置
    string strSql = "delete from EPM_PowerList where empid="+ViewState["UserId"].ToString();
    connE.runSqlOnly(strSql);
    //重新设置权限
    SaveTree();
    connE.Alert("保存成功!",Page);

    //重新在服务器端初始权限信息
    InitData();
    
}

/**//// <summary>
/// 保存树中已选择的节点
/// </summary>

protected void SaveTree()
{
    //获得所有已经选择的接点
    string strSelected = string.Empty;
    strSelected = this.checkedNodes.Value;
    if(strSelected != string.Empty)
    {
        strSelected = strSelected.Substring(0,strSelected.Length-1);
        string [] strSelecteds  = strSelected.Split(',');
        foreach(string str in strSelecteds)
        {
            string strSql = "insert EPM_PowerList (EMPid,deptid) values ('"+ViewState["UserId"].ToString()+"','"+str+"')";
            connE.runSqlOnly(strSql);
        }
    }
    
}

3.客户端操作TreeView带CheckBox的好例子（2）－－选择子节点后自动选择父节点；取消子节点后根据情况的递归取消父节点。
把上面的tree_oncheck()修改一下，然后增加两个方法setParent()和checkBrother(),代码如下：

//节点的oncheck事件
function tree_oncheck(tree)
{
    var node=tree.getTreeNode(tree.clickedNodeIndex);
    var Pchecked=tree.getTreeNode(tree.clickedNodeIndex).getAttribute("checked");
    setcheck(node,Pchecked);
    setParent(node,Pchecked);//如果是选择那么选择其父接点.
    document.all.checkedNodes.value="";
    document.all.unchecked.value="";
    FindCheckedFromNode(TreeView1);
}

//设置子节点选中/取消;
//同时需要设置父节点的状态(如果是取消选中的话,仅仅设置本节点及其所有字接点,不涉及父接点)
function setParent(node,Pc)
{
    var parentNode = node.getParent();
    if(parentNode)
    {    
        var parentNodeFather = parentNode.getParent();
        if(parentNodeFather)
        {
            setParent(parentNode,Pc);
        }
        if(Pc)
            {parentNode.setAttribute("checked",Pc);}
        else
        {
            checkBrother(parentNode,Pc,node.getAttribute("NodeData"))
        }
    }
}
//检查子接点是否有选择的,如果有一个选择了,那返回true
//只查第一级节点.
function checkBrother(parentNode,Pc,nodeData)
{
    var childNodes = new Array();
    childNodes = parentNode.getChildren();
    if(childNodes.length >0)
    {
        var bChecked = true;
        for(var i=0;i<childNodes.length;i++)
        {
            if(childNodes[i].getAttribute("checked") == true &&  childNodes[i].getAttribute("NodeData") != nodeData)
            {
                //alert(i+childNodes[i].getAttribute("Text"));
                bChecked = false;
                break;
            }
        }
        if(bChecked)
        {
            parentNode.setAttribute("checked",Pc);
        }
        else
        {
            //所有父结点选择
            setParent(parentNode,!Pc)
        }
    }
    else
    {
        parentNode.setAttribute("checked",Pc);
    }
}

4.TreeView节点的精确定位问题（通过NodeData来定位）

    //Page_Load事件里根据NodeData来展开到到定位的节点
    //这里是修改别人的(作者是根据Node的Text定位的.
    FindInTree2(Request.QueryString["selectedNodeData"].ToString());

    //根据NodeDate寻找节点
    private void FindInTree2(string strNodeData)
    {  
        foreach (TreeNode tn in TreeView1.Nodes)            
        {
            if (tn.NodeData != strNodeData)
            {   
                FindInTree2(tn,strNodeData);
            } 
            else
            {   
                ExpandTree2(tn);
                return;
            }
        }
    }
    //根据NodeDate寻找节点
    private void FindInTree2(TreeNode objTreeNode,string strNodeData)
    {   
        foreach (TreeNode tn in objTreeNode.Nodes)            
        {
            if (tn.NodeData != strNodeData)
            {

                FindInTree2(tn,strNodeData);
            } 
            else
            {   
                ExpandTree2(tn);
                return;
            }
        }
    }
    //根据NodeDate展开节点
    private void ExpandTree2(TreeNode objTreeNode)
    {   
        string strIndex = "0";

        objTreeNode.Expanded = true;

        strIndex = objTreeNode.GetNodeIndex();

        while (objTreeNode.Parent is TreeNode)
        {
            objTreeNode = ((TreeNode)objTreeNode.Parent);
            objTreeNode.Expanded = true;                
        }

        TreeView1.SelectedNodeIndex = strIndex;
    }

5.asp.net 2.0里TreeView已经集成了,不需要单独安装了,但现在偶觉得,他只是换汤不换药,特别是在节点定位,和客户端操作上这两个关键问题上没啥改进.(偶没用过只是看了它的介绍.)

ASP.NET 2.0 的TreeView 控件介绍(转载)

TreeView客户端操作在这里啊~~~~~~~~~~~~
http://msdn.microsoft.com/library/default.asp?url=/workshop/webcontrols/behaviors/library/TreeView/TreeView.asp

http://www.microsoft.com/china/msdn/archives/library/workshop/webcontrols/overview/treeview.asp

1.下载地址
http://msdn.microsoft.com/downloads/samples/internet/ASP_DOT_NET_ServerControls/WebControls/default.asp
下载后是后缀为bat的版本
(1)bulid.将bulid.bat的路径指向csc.exe所在路径,生成Microsoft.Web.UI.WebControls.dll。
(2)在wwwroot下创建空目录webctrl_client\1_0。
(3)将build\Runtime下的文件拷至webctrl_client\1_0下。
(4)选择工具箱的自定义工具箱，添加Microsoft.Web.UI.WebControls.dll。
有些麻烦
但如果你能找到后缀是msi的自动安装版本，直接下一步就行（我一直用这个版本，hoho）
安装后，通过“自定义工具箱”->“.net框架组件”把TreeView添加到工具箱里

2.运行时无法显示
一般是TreeView的版本问题，最好下载英文版自动安装版本重新安装，安装前应该先到添加删除程序里卸掉原版本

3.显示格式出错（非树状显示）
TreeView要求客户端浏览器版本为IE5.5及以上，最好要求客户端升级为IE6.0

4.框架里使用TreeView
设置NavigateUrl、Target属性，可更新另外的Frame

5.找不到TreeNode类
使用TreeView，最好添加namespace：using Microsoft.Web.UI.WebControls;

6.遍历TreeView节点(递归算法)
private void Page_Load(object sender, System.EventArgs e)
{
 GetAllNodeText(TreeView1.Nodes);
}
void GetAllNodeText(TreeNodeCollection tnc)
{
 foreach(TreeNode node in tnc)
 {
  if(node.Nodes.Count!=0)
   GetAllNodeText(node.Nodes);
  Response.Write(node.Text + " ");
 }
}

7.得到node结点的父节点
TreeNode pnode;
if(node.Parent is TreeNode)
 pnode=(TreeNode)node.Parent;
else
 //node is root node

8.修改TreeView样式（示例）
<iewc:TreeView id="TreeView1" runat="server" HoverStyle="color:blue;background:#00ffCC;" DefaultStyle="background:red;color:yellow;" SelectedStyle="color:red;background:#00ff00;">
用代码：
TreeView1.DefaultStyle["font-size"] = "20pt";

9.展开时不提交，改变选择节点时才提交
将autopostback设置成false; 
在body里添加  <body  onload="initTree()"> 
然后在PageLoad里写： 
string  strTreeName  =  "TreeView1"; 
string  strRef  =  Page.GetPostBackEventReference(TreeView1); 
string  strScript  =  "<script  language=\"JavaScript\">  \n"  +  "<!--  \n"  +  "            function  initTree()  {  \n"  +"                        "  +  strTreeName  +  ".onSelectedIndexChange  =  function()  {  \n"  +    "if  (event.oldTreeNodeIndex  !=   
event.newTreeNodeIndex)  \n"  +  "this.queueEvent('onselectedindexchange',  event.oldTreeNodeIndex  +  ','  +  event.newTreeNodeIndex);  \n"  +    "window.setTimeout('"  +  strRef.Replace("'","\\'")    +  "',  0,  'JavaScript');  \n"  +    "                        }  \n"  +      "            }  \n"  +    "//  -->  \n"  +  "</script>"; 
Page.RegisterClientScriptBlock("InitTree",strScript  ); 
 
这样就只有你点击的节点更改的时候才提交！

10.TreeView结合XML
把XML文件设置为如下格式，然后直接设置TreeNodeSrc为该XML文件就行
<?xml version="1.0" encoding="GB2312"?>
<TREENODES>
 <TREENODE TEXT="node0" EXPANDED="true">
  <TREENODE TEXT="node1"/>
  <TREENODE TEXT="node2"/>
 </TREENODE>
 <TREENODE TEXT="node3" NavigateURL="3.aspx"/>
</TREENODES>
或者用代码
TreeView1.TreeNodesrc="a.xml";
TreeView1.DataBind();

 11.请问，在页面加载时，如何选中Treeview某一节点?

index属性，是一个如1.1.0的东西，解析这个字符串，然后定位

private void ExpandNode(string selID)//selID like 1.1.0
{
 char[] mySplit = new char[]{'.'};
 string [] nodeArray = selID.Split(mySplit);

 TreeNode myNode = null;
 for(int i=0;i<nodeArray.Length;i++)
 {
  if(i==0)
   myNode = tree.Nodes[Convert.ToInt32(nodeArray[i])];
  else
   myNode = myNode.Nodes[Convert.ToInt32(nodeArray[i])];

  myNode.Expanded = true;  
  tree.SelectedNodeIndex = myNode.GetNodeIndex();
 }   
}

客户端控制TreeView
http://expert.csdn.net/Expert/topic/1382/1382892.xml

1.设置所选节点，如选中第二个节点
function SetSelNode()
{
 TreeView1.selectedNodeIndex="1";
}

2.得到所选节点的Text，ID或NodeData
function GetAttribute()
{
 alert(TreeView1.getTreeNode(TreeView1.selectedNodeIndex).getAttribute("Text"));
}
替换Text为ID或NodeData，可分别得到所选节点的ID或NodeData

3.修改节点属性，如修改第一个节点的Text
function ModifyNode()
{
 var node=TreeView1.getTreeNode("0");
 node.setAttribute("Text","hgknight");
}

4.得到点击节点
function TreeView1.onclick()
{
 alert(TreeView1.getTreeNode(TreeView1.clickedNodeIndex).getAttribute("Text"));
}

5.添加节点
function AddNode()
{
 var node=TreeView1.createTreeNode();
 node.setAttribute("Text","hgknight");
 TreeView1.add(node);   
}

6.js遍历所有节点
 var AllRootNode=new Array();
 AllRootNode=TreeView1.getChildren();
 AlertNode(AllRootNode);  

 function AlertNode(NodeArray)
 {
  if(parseInt(NodeArray.length)==0)
   return;
  else
  {
   for(i=0;i<NodeArray.length;i++)
   {
    var cNode;
    cNode=NodeArray[i];
    alert(cNode.getAttribute("Text"));
    if(parseInt(cNode.getChildren().length)!=0)
     AlertNode(cNode.getChildren());   
   }
  }
 }

--------------------------------------------------------------------------------------------------------------------------------------------------------

<iewc:treeview id="TreeView1" runat="server" wilth="100%" AutoSelect="True" BorderWidth="2px" Target="main"
ExpandedImageUrl="images/fopen.gif" SelectedImageUrl="images/bookmark.gif" ImageUrl="images/fclose.gif"
BorderColor="AliceBlue" BackColor="#ffffcc" SystemImagesPath="../webctrl_client/1_0/treeimages/"
SelectExpands="True" ExpandLevel="1"></iewc:treeview>
-----------------

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using Microsoft.Web.UI.WebControls;
namespace aspnetc.admin
{
/// <summary>
/// left 的摘要说明。
/// </summary>
public class left : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Label lblName;
protected Microsoft.Web.UI.WebControls.TreeView TreeView1;
protected System.Web.UI.WebControls.HyperLink hlkLogOut;
protected System.Web.UI.WebControls.Label Label2;

ClassConn connE = new ClassConn();

private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
if (!IsPostBack)
{
lblName.Text=Session["userName"]!=null ? Session["userName"].ToString():string.Empty;
try
{
//添加命令，从数据库中得到数据
SqlDataAdapter ada = new SqlDataAdapter("select * from menues where state=1 order by sortIndex",connE.GetConn());
DataSet ds=new DataSet();
ada.Fill(ds);
this.ViewState["ds"]=ds;
}
catch (Exception ex)
{
throw (ex);  
}
finally
{
connE.Close();
}
//调用递归函数，完成树形结构的生成
AddTree(0, (TreeNode)null);
}
}

#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}

/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{   
this.Load += new System.EventHandler(this.Page_Load);

}
#endregion

/// <summary>
///  递归添加树的节点
/// </summary>
/// <param name="ParentID"></param>
/// <param name="pNode"></param>
public void AddTree(int ParentID,TreeNode pNode)
{
DataSet ds=(DataSet) this.ViewState["ds"];
DataView dvTree = new DataView(ds.Tables[0]);
//过滤ParentID,得到当前的所有子节点
dvTree.RowFilter =  "[parentId] = " + ParentID;

foreach(DataRowView Row in dvTree)
{
TreeNode Node=new TreeNode() ;
if(pNode == null)
{    //添加根节点
Node.Text = Row["name"].ToString();
TreeView1.Nodes.Add(Node);
//Node.Expanded=false;//是否展开若设置为true 则ExpandLevel="1"无效
AddTree(Int32.Parse(Row["ID"].ToString()), Node);    //再次递归
}
else
{ 

if(4>3)
{
//添加当前节点的子节点
Node.Text = Row["name"].ToString();
//Node.Target = mainFrame;
Node.NavigateUrl = Row["url"].ToString();
pNode.Nodes.Add(Node);
//Node.Expanded = false;
AddTree(Int32.Parse(Row["ID"].ToString()),Node);     //再次递归
}
}
}                  
}           
   

}
}
----------------------------------------------------------------------------------------------------------------------------------------

http://www.microsoft.com/china/MSDN/library/archives/library/DNAspp/html/aspnet-usingtreeviewieWebcontrol.asp


 IEWebControl TreeView右键菜单实例     选择自 hgknight 的 Blog

一个IEWebControl TreeView右键菜单的例子，实现了添加、修改和删除功能，复制即可运行
更多TreeView的客户端操作参见
http://www.csdn.net/Develop/read_article.asp?id=22100

<%@ Register TagPrefix="iewc" Namespace="Microsoft.Web.UI.WebControls" Assembly="Microsoft.Web.UI.WebControls, Version=1.0.2.226, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %>
<HTML>
 <HEAD>
  <title>TreeView控件右键菜单</title>
  <style>
  <!--
   .skin
   {
   cursor:default;
   font:menutext;
   position:absolute;
   text-align:left;
   font-family: Arial, Helvetica, sans-serif;
   font-size: 10pt;
   width:120px;
   background-color:menu;
   border:1 solid buttonface;
   visibility:hidden;
   border:2 outset buttonhighlight;
   }
   .menuitems
   {
   padding-left:15px;
   padding-right:10px;
   }
   -->
  </style>
 </HEAD>
 <body onclick="hideMenu()">
  <form id="TreeView" method="post" runat="server">
   <iewc:TreeView id="TreeView1" runat="server" ExpandLevel="3" HoverStyle="color:blue;background:#ffff00;">
    <iewc:TreeNode Text="Node0" Expanded="True">
     <iewc:TreeNode Text="Node3">
      <iewc:TreeNode Text="Node5"></iewc:TreeNode>
      <iewc:TreeNode Text="Node6"></iewc:TreeNode>
     </iewc:TreeNode>
     <iewc:TreeNode Text="Node4"></iewc:TreeNode>
    </iewc:TreeNode>
    <iewc:TreeNode Text="Node1" Expanded="True">
     <iewc:TreeNode Text="Node7">
      <iewc:TreeNode Text="Node8"></iewc:TreeNode>
     </iewc:TreeNode>
    </iewc:TreeNode>
    <iewc:TreeNode Text="Node2" Expanded="True">
     <iewc:TreeNode Text="Node9"></iewc:TreeNode>
     <iewc:TreeNode Text="Node10">
      <iewc:TreeNode Text="Node11"></iewc:TreeNode>
      <iewc:TreeNode Text="Node12"></iewc:TreeNode>
     </iewc:TreeNode>
    </iewc:TreeNode>
   </iewc:TreeView>
   <div id="popupMenu" class="skin" onMouseover="highlighItem()" onMouseout="lowlightItem()" onClick="clickItem()">
    <div class="menuitems" func="add">添加</div>
    <hr>
    <div class="menuitems" func="delete">删除</div>
    <div class="menuitems" func="modify">修改</div>
   </div>
  </form>
  <script language="javascript">
   var menuskin = "skin";
   var node = null;

   function hideMenu()
   {
    popupMenu.style.visibility = "hidden";
   }

   function highlighItem()
   {
    if (event.srcElement.className == "menuitems")
    {
     event.srcElement.style.backgroundColor = "highlight";
     event.srcElement.style.color = "white";
    }
   }

   function lowlightItem()
   {
    if (event.srcElement.className == "menuitems")
    {
     event.srcElement.style.backgroundColor = "";
     event.srcElement.style.color = "black";
     window.status = "";
    }
   }

   function clickItem()
   {    
    if (event.srcElement.className == "menuitems")
    {
     if(event.srcElement.getAttribute("func") == "add" && node != null)
     {
      var newNode=TreeView1.createTreeNode();
      newNode.setAttribute("Text","new Node");
      node.add(newNode);
     }
     else if (event.srcElement.getAttribute("func") == "delete" && node != null)
     {
      node.remove();
     }
     else if (event.srcElement.getAttribute("func") == "modify" && node != null)
     {
      node.setAttribute("Text","hgknight");
     }
    }
   }
   
   function TreeView1.oncontextmenu()
   {
    var nodeindex = event.treeNodeIndex;
    if (typeof(nodeindex) == "undefined")
    {
     node = null;
     return;
    }
    
    node = TreeView1.getTreeNode(nodeindex);
    
    var rightedge = document.body.clientWidth-event.clientX;
    var bottomedge = document.body.clientHeight-event.clientY;
    if (rightedge <popupMenu.offsetWidth)
    {
     popupMenu.style.left = document.body.scrollLeft + event.clientX - popupMenu.offsetWidth;
    }
    else
    {
     popupMenu.style.left = document.body.scrollLeft + event.clientX;
    }
    if (bottomedge <popupMenu.offsetHeight)
    {
     popupMenu.style.top = document.body.scrollTop + event.clientY - popupMenu.offsetHeight;
    }
    else
    {
     popupMenu.style.top = document.body.scrollTop + event.clientY;
    }
    popupMenu.style.visibility = "visible";
    return false;
   } 
   
  </script>
 </body>
</HTML>
-----------------------------------------------------------------------------
服务器端选择一节点下所有子节点(先选择再CHECK,麻烦)
private void TreeView1_Check(object sender, Microsoft.Web.UI.WebControls.TreeViewClickEventArgs e)
  {
   Microsoft.Web.UI.WebControls.TreeNode node=TreeView1.GetNodeFromIndex(TreeView1.SelectedNodeIndex.ToString());
   //connE.Alert(node.NodeData.ToString(),Page);
   SetAllNodeData(node.Nodes);
  }