学步园

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();
        }
    }  
}

<!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>