treevie刷新问题

achao201 2009-04-17 07:14:48

treeview想实现这个功能，点击父节点，就展开子节点，点击子节点用脚本传值。。。，但是用了Tv_SelectedNodeChanged方法，会回发页面，对其加了一个updatepanle后，tn.Expanded = true; 无效了，点击父节点展开不了子节点。。。



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



<%@ Register assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" namespace="System.Web.UI" tagprefix="asp" %>



<!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>产品类别选择</title>

</head>

<body style="font-weight: 700">

    <form id="form1" runat="server">

    <div>

    <asp:ScriptManager ID="ScriptManager1" runat="server">

    </asp:ScriptManager>

                <asp:TreeView ID="Tv" runat="server" ImageSet="Msdn" 

            onselectednodechanged="Tv_SelectedNodeChanged" ExpandDepth="1" NodeIndent="10" 

                    ShowLines="True">

                    <ParentNodeStyle Font-Bold="False" />

                    <HoverNodeStyle Font-Underline="True" BackColor="#CCCCCC" BorderColor="#888888" 

                        BorderStyle="Solid" />

                    <SelectedNodeStyle Font-Underline="False" 

                HorizontalPadding="3px" VerticalPadding="1px" BackColor="White" 

                        BorderColor="#888888" BorderStyle="Solid" BorderWidth="1px" />

                    <NodeStyle Font-Names="Verdana" Font-Size="8pt" ForeColor="Black" 

                HorizontalPadding="5px" NodeSpacing="1px" VerticalPadding="2px" />

                </asp:TreeView>

    

    

        

    

        <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">

            <Triggers>

                <asp:AsyncPostBackTrigger ControlID="Tv" EventName="SelectedNodeChanged">

                </asp:AsyncPostBackTrigger>

            </Triggers>

        </asp:UpdatePanel>

    

    

        

    

    </div>

    

    </form>

</body>

</html>



using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;



public partial class Business_center_Function_page_Product_mailpublish_product_type_sel : System.Web.UI.Page

{



    DataSet dsTv;

    private static string UserKind_Type = "01";

    protected void Page_Load(object sender, EventArgs e)

    {

        if (this.IsPostBack == false)

        {

            string strName = Member.GetUserName() ;

            UserKind_Type = (Request.QueryString["UserKind_Type"] != null) ? Request.QueryString["UserKind_Type"].ToString() : "01"; //默认是供应的产品类别，01供应，02为求购,04为未定义

            if (!string.IsNullOrEmpty(strName))

            {

                BindTV(strName,UserKind_Type);

                initTree(Tv.Nodes,"0");

            }

        }

    }



    private DataSet BindTV(string UserName, string UserKind_Type)

    {

        car2100.BLL.Enterprise.product_purvey_info bllPurvey = new car2100.BLL.Enterprise.product_purvey_info();

        dsTv = bllPurvey.GetDataKind(UserName,UserKind_Type);

        return dsTv;

    }



    public void initTree(System.Web.UI.WebControls.TreeNodeCollection nds, string ParentID)

    {



        DataView dv = new DataView();

        dv.Table = dsTv.Tables[0];



        dv.RowFilter = "ParentnID='" + ParentID + "'";

        TreeNode tnd;

        foreach(System.Data.DataRowView drv in dv)

        {

            tnd = new TreeNode();

            tnd.Value = drv.Row["TypeCode"].ToString().Trim();

            tnd.Text = drv.Row["TypeName"].ToString().Trim();



            nds.Add(tnd);

            string tn = tnd.Value;

            initTree(tnd.ChildNodes, tn);

        }



    }



    protected void Tv_SelectedNodeChanged(object sender, EventArgs e)

    {

        TreeNode tn = Tv.SelectedNode;

        if (tn.ChildNodes.Count > 0)

        {

         

           tn.Expanded = true;

           

        }

        else

        {

            string nodeText = tn.Text.Trim();

            string nodeValue = tn.Value.Trim();

            string script = "";

            if (UserKind_Type == "01")

            {

  

                script = "<script>window.parent.SetKind('" + nodeText + "','" + nodeValue + "');</script>";

            }

            else if (UserKind_Type == "04")

            {

 

                script = "<script>window.parent.SetProKind('" + nodeText + "','" + nodeValue + "'); </script>";

            }

        

        

            ScriptManager.RegisterStartupScript(Page, this.GetType(), "OpenKind", script, false);

        }

    }

}