asp.net 防刷新 无限级 TreeView 控件

asp.net 防刷新 无限级 TreeView 控件

可以放在 模板页里当导航，跳转页面时会TreeView  保持状态

我写在了一个用户控件里，然后 配置的XML文件放在 App_data里

WebUserControl.ascx:

 

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="WebUserControl.ascx.cs" Inherits="WebUserControl" %>
  <style>
    .personDiv
    {
        margin-top: 3px;
        border: 1px solid #8fc7ef;
        margin-bottom: 5px;
        width:200px;
    }
    .personTitle
    {
        height: 23px;
        background: url(images/workReminder_TitleBg.png) repeat-x;
        color: #0a51bc;
        font-weight: bold;
        font-size: 12px;
        padding-left: 10px;
        line-height:23px;
    }
    .persona
    {
        text-decoration:none;
        
        }
</style>
<div class="personDiv">
    <div class="personTitle">
        防刷新无限级TreeView</div>
    <asp:TreeView ID="TreeView1" runat="server" OnSelectedNodeChanged="TreeView1_SelectedNodeChanged"
        PopulateNodesFromClient="False" ImageSet="Msdn" NodeIndent="10" ForeColor="red">
        <ParentNodeStyle Font-Bold="False" />
        <HoverNodeStyle BackColor="#8fc7ef" BorderColor="#8fc7ef" BorderStyle="Solid" Font-Underline="True" CssClass="persona" />
        <SelectedNodeStyle BackColor="White" BorderColor="#8fc7ef" BorderStyle="Solid" BorderWidth="1px"
            Font-Underline="False" HorizontalPadding="3px" VerticalPadding="1px" />
        <NodeStyle Font-Names="Verdana" Font-Size="8pt" ForeColor="Black" HorizontalPadding="5px"
            NodeSpacing="1px" VerticalPadding="2px" />
    </asp:TreeView>
</div>

 

WebUserControl.ascx.cs:

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;

public partial class WebUserControl : System.Web.UI.UserControl
{
    DataSet ds;
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            bind();
        }
    }

    private void bind()
    {
        ds = new DataSet();
        ds.ReadXml(Server.MapPath("App_data/") + "personmanager.xml");
        for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
        {
            string fcode = ds.Tables[0].Rows[i]["fcode"].ToString();
            if (fcode == "0")
            {
                TreeNode tr = new TreeNode();
                tr.Text = ds.Tables[0].Rows[i]["name"].ToString();
                tr.Value = ds.Tables[0].Rows[i]["code"].ToString();
                this.TreeView1.Nodes.Add(tr);
                GetTree(tr);
            }
        }
    }
    private void GetTree(TreeNode node)
    {
        for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
        {
            string fcode = ds.Tables[0].Rows[i]["fcode"].ToString();
            if (fcode == node.Value.Trim())
            {
                TreeNode tr = new TreeNode();
                tr.Text = ds.Tables[0].Rows[i]["name"].ToString();
                tr.Value = ds.Tables[0].Rows[i]["code"].ToString();
                node.ChildNodes.Add(tr);
                tr.Expanded = false;
                if (Session["treecode"] != null)
                {
                    if (Session["treecode"].ToString().Trim() == ds.Tables[0].Rows[i]["code"].ToString().Trim())
                    {
                        Expand(tr);
                    }
                }
                GetTree(tr);
            }
        }
    }
    private void Expand(TreeNode node)
    {
        if (node.Parent != null)
        {
            node.Parent.Expanded = true;
            Expand(node.Parent);
        }
    }
    protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
    {
        ds = new DataSet();
        ds.ReadXml(Server.MapPath("App_data/") + "personmanager.xml");
        string value = this.TreeView1.SelectedNode.Value;
        string url = "";
        for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
        {
            string code = ds.Tables[0].Rows[i]["code"].ToString();
            if (code == value)
            {
                url = ds.Tables[0].Rows[i]["url"].ToString();
            }
        }
        if (url != "")
        {
            Session.Add("treecode", value);
            Response.Redirect(url);
        }
    }
}

 

personmanager.xml:

 

<?xml version="1.0" encoding="utf-8" ?>
<Tree>
  <treenode>
    <code>01</code>
    <name>欧洲歌手</name>
    <fcode>0</fcode>
    <url>default1.aspx</url>
  </treenode>

  <treenode>
    <code>02</code>
    <name>美洲歌手</name>
    <fcode>0</fcode>
    <url>default1.aspx</url>
  </treenode>

  <treenode>
    <code>03</code>
    <name>非洲歌手</name>
    <fcode>0</fcode>
    <url>default1.aspx</url>
  </treenode>

  <treenode>
    <code>04</code>
    <name>亚洲歌手</name>
    <fcode>0</fcode>
    <url>default1.aspx</url>
  </treenode>

  <treenode>
    <code>05</code>
    <name>中国歌手</name>
    <fcode>0</fcode>
    <url>default3.aspx</url>
  </treenode>

  <treenode>
    <code>051</code>
    <name>中国港台歌手</name>
    <fcode>05</fcode>
    <url>f.aspx</url>
  </treenode>


  <treenode>
    <code>0511</code>
    <name>港台男歌手</name>
    <fcode>051</fcode>
    <url>default2.aspx</url>
  </treenode>


  <treenode>
    <code>0512</code>
    <name>港台女歌手</name>
    <fcode>051</fcode>
    <url>default3.aspx</url>
  </treenode>

</Tree>