动态生成TreeView并实现单击选中复选框同时实现复选框单选

本篇如何实现动态生成TreeView；如何实现单击选中复选框；如何实现复选框单选
其中涉及：TreeNodeCheckChanged，SelectedNodeChanged，javascript__doPostBack("","");，    CheckedNodes

隐藏页.cs（后台）代码：（用的时候记得改动webconfig，还有建表）

using  System;
using  System.Data;
using  System.Configuration;
using  System.Collections;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Web.UI.HtmlControls;
using  System.Data.SqlClient;

public   partial   class  System_MenuManage : System.Web.UI.Page
{
     protected   void  Page_Load( object  sender, EventArgs e)
    {
         if  ( ! IsPostBack)
        {
            CreateTreeView();
             // treeMenu.Attributes.Add("oncheck", "javascript:on();"); // 这的oncheck没有用的，checkbox钩种不会触发。而onclick会触发
            treeMenu.Attributes.Add( " onclick " ,  " javascript:onPost() " ); 
        }
    }
     ///   <summary>
     ///  创建 TreeView 出自： http://www.cnblogs.com/Jinglecat/archive/2007/08/10/850090.html
     ///  此方法采取一次性加载目标数据到 DataTable，递归查询 DataTable ，创建子节点
     ///   </summary>
     private   void  CreateTreeView()
    {
         // const int VirtualRootId = 0;  //  虚拟的根节点 ID， 表中 ParentID=0 的节点表示无实际父节点
         const   string  SQL_SELECT  =   " SELECT Id, NodeName,ParentId FROM TreeView ORDER BY ParentId ASC " ;
         string  connStr  =  ConfigurationManager.ConnectionStrings[ " PKConnectionString " ].ConnectionString;
        
        SqlDataAdapter da  =   new  SqlDataAdapter(SQL_SELECT, connStr);
        DataTable dt  =   new  DataTable();
        
        da.Fill(dt);
        CreateTreeViewRecursive(treeMenu.Nodes, dt,  0 );
    }

     ///   <summary>
     ///  递归查询数据，创建 TreeNode 节点
     ///   </summary>
     ///   <param name="nodes"></param>
     ///   <param name="dataSource"></param>
     ///   <param name="parentId"></param>
     private   void  CreateTreeViewRecursive(TreeNodeCollection nodes, DataTable dataSource,  int  parentId)
    {
         string  fliter  =  String.Format( " ParentId={0} " , parentId);
         //  查询出节点数据
        DataRow[] drArr  =  dataSource.Select(fliter);

        TreeNode node;
         foreach  (DataRow dr  in  drArr)
        {
            node  =   new  TreeNode();
            nodes.Add(node);
             //  设置属性 
                node.Text  =  ( string )dr[ " NodeName " ];
                 int  nodeId  =  ( int )dr[ " Id " ];
                node.Value  =  nodeId.ToString();
                node.SelectAction  =  TreeNodeSelectAction.SelectExpand;
                node.ShowCheckBox  =   true ;
             //  递归创建子节点
            CreateTreeViewRecursive(node.ChildNodes, dataSource,nodeId);
             //  移除已添加行，提高性能
            dataSource.Rows.Remove(dr);
        }
    }
// 关系单击选中复选框
     protected   void  treeMenu_SelectedNodeChanged( object  sender, EventArgs e)
    {
        TreeView tv  =  (TreeView)sender;
         if  (treeMenu.CheckedNodes.Count  != 0 )
        {
        TreeNode t  =  treeMenu.CheckedNodes[ 0 ];
        t.Checked  =   false ;
        }

        TreeNode tn  =  tv.SelectedNode;
         // 本来这是用遍历树的节点做的，比较下还是现在的性能比较好。
         // Check(this.treeMenu.Nodes); //  treeMenu.Nodes 就只是一个根节点     
        tn.Checked  =   true ;
        Session[ " beforNodeId " ]  =  tn.Value;

         string  sqlstr  =   " SELECT* FROM TreeView where id= "   + tn.Value;
         string  connStr  =  ConfigurationManager.ConnectionStrings[ " PKConnectionString " ].ConnectionString;

        SqlDataAdapter da  =   new  SqlDataAdapter(sqlstr, connStr);
        DataTable dt  =   new  DataTable();

        da.Fill(dt);
        GridView1.DataSource  =  dt;
        GridView1.DataBind();
    }
     //  关系到复选框的单选
     protected   void  treeMenu_TreeNodeCheckChanged( object  sender, EventArgs e)
    {

         // 把原来的check设为false
         if  (treeMenu.CheckedNodes.Count  >   1 )
        {
             for  ( int  i  =   0 ; i  <  treeMenu.CheckedNodes.Count; i ++ )
            {
                TreeNode tntemp  =  treeMenu.CheckedNodes[i];
                 // tntemp.Checked = false;
                 if  (tntemp.Value  ==  ( string )Session[ " beforNodeId " ])
                {
                    tntemp.Checked  =   false ;
                }
            }

        }
         if  (treeMenu.CheckedNodes.Count  !=   0 )
        {
            TreeView tv  =  (TreeView)sender;
            TreeNode tn  =  treeMenu.CheckedNodes[ 0 ];
            Session[ " beforNodeId " ]  =  tn.Value;
             string  sqlstr  =   " SELECT* FROM TreeView where id= "   +  tn.Value;
             string  connStr  =  ConfigurationManager.ConnectionStrings[ " PKConnectionString " ].ConnectionString;

            SqlDataAdapter da  =   new  SqlDataAdapter(sqlstr, connStr);
            DataTable dt  =   new  DataTable();

            da.Fill(dt);
            GridView1.DataSource  =  dt;
            GridView1.DataBind();
        }
    }  
}

.aspx代码（用的时候记得改动<%@  Inherits="System_MenuManage" %>）

 

<% @ Page Language = " C# "  AutoEventWireup = " true "  CodeFile = " MenuManage.aspx.cs "  Inherits = " System_MenuManage "   %>

<! DOCTYPE html PUBLIC  " -//W3C//DTD XHTML 1.0 Transitional//EN "   " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >

< html xmlns = " http://www.w3.org/1999/xhtml "   >
< head runat = " server " >
     < title > 无标题页 </ title >
< script language = " javascript "  type  = " text/javascript "   >
function onPost()
{
 __doPostBack( "" , "" );

}
</ script >
</ head >
< body  style  = "  height :100%; width :100%; "   <%-- onload  = " autofitIframe('IFRAME') " --%>>
     < form id = " form1 "  runat = " server "  style  = "  height :100%; width :100%; position:relative " >
     < div id = " top "  style  = " height :100%; width :100%; " >
     < a href  = " # " > 系统管理 </ a >& gt; & gt; < span  ></ span >< a href  = " MenuManage.aspx " > 菜单管理 </ a >
         < br  />
         < div  id  = " left "  style = " width: 40%; position: absolute;  margin-top: 5%;
             margin - left :0px; margin - bottom :0px; height : 95 % ; " >
             < asp:Label ID = " Label1 "  runat = " server "  Text = " 编辑导航 "  Height = " 200px "  Width  = " 50% " >
                 < asp:TreeView ID = " treeMenu "  runat = " server "  ExpandDepth = " 1 "   OnSelectedNodeChanged = " treeMenu_SelectedNodeChanged "  OnTreeNodeCheckChanged = " treeMenu_TreeNodeCheckChanged " >
                     < HoverNodeStyle BackColor = " #8080FF "   />
                 </ asp:TreeView >
             </ asp:Label >
          </ div >
         < div id = " right "   style = "  width: 60%;position: absolute; background-color: lightgrey; margin-left :40%;  margin-top :5% ;margin-bottom:0px; height:95%; " >
             < asp:GridView ID = " GridView1 "  runat = " server " >
             </ asp:GridView >
         </ div >
     </ div >   
     </ form >
</ body >
</ html >

数据库表如图（只是简单的意思了下）：其中id，ParentId都是int，id是自增的，其他为char其中根节点的ParentId必须为0（如果是别的传到creattree里的参数要随之变动）