树型结构一直是我们常用的结构。本文将详细具体的对其进行实现。
数据库是SQL server 2000。
webconfig的数据库配置内容:
<appSettings>
<add key="DatabaseConnStr" value="server=localhost;uid=sa;pwd=123456;database=infoFlat" />
</appSettings>
其中的数据库设计：
sysFunction表：
名称 类型 长度 说明
1 FunctionId int 4 0
0 FunctionName varchar 50 0
0 ParentFunctionId int 4 0
内容如下：
1 系统功能 0
2 信息中心 1
3 新闻 2
4 通知 2
5 公告 2
6 项目中心 1
7 申报 6
8 审批 6
9 过程 6
10 结题 6
11 产品中心 1
12 在研产品 11
具体代码：
1 file:///H:/infoFlat/InterFace/Left.aspx 树型结构页面
<%...@ Page Language="C#" AutoEventWireup="true" CodeFile="Left.aspx.cs" Inherits="InterFace_Left" %>
<!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>功能列表</title></head><body> <form id="formFuncList" runat="server"> <div> <asp:Label ID="LabelUserId" runat="server" Text="Label"></asp:Label> <br /> <asp:TreeView ID="TreeViewFuncList" runat="server" ShowLines="True"> </asp:TreeView> </div> </form></body></html>
2 file:///H:/infoFlat/App_Code/Database/DbConn.cs 数据库连接
/**//// ************************************************************
/// Copyright (C), 2006-2007, GUET./// FileName: Index.aspx.cs/// Author: longronglin/// Version : 1.0/// Date: 2007-01-23/// Description: /// Function List: /// 1. /// 2. /// 3. /// History: /// <author> <time> <version> <desc>/// longronglin 2007/01/23 1.0 modify xxx . 
/// *************************************************************using System;using System.Data;using System.Configuration;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;namespace infoFlat.App_Code.Database...{
/**//// <summary> /// Summary description for DbConn
/// </summary> public class DbConn : IDisposable ...{ // 数据库连接 private static SqlConnection conn; public DbConn() ...{ // } /**//// <summary> /// 获取数据库连接并打开 /// </summary> public static SqlConnection GetConn() ...{ // 获取数据库连接 if (conn == null) ...{ // DatabaseConnStr为web.config对应的appSettings设置 conn = new SqlConnection(System.Configuration.ConfigurationManager.AppSettings["DatabaseConnStr"]); } // 打开数据库连接 if (conn.State == System.Data.ConnectionState.Closed) ...{ conn.Open(); } return conn; } /**//// <summary> /// 释放资源 /// </summary> public void Dispose() ...{ // 确认连接是否已经关闭 if (conn != null) ...{ conn.Dispose(); conn = null; } } }}
3 file:///H:/infoFlat/InterFace/Left.aspx.cs Left对应的代码：
/**//// ************************************************************/// Copyright (C), 2006-2007, GUET./// FileName: Index.aspx.cs/// Author: longronglin/// Version : 1.0/// Date: 2007-01-24/// Description: /// Function List: /// 1. void Page_Load()/// 2. /// 3. /// History: /// <author> <time> <version> <desc>/// longronglin 2007/01/24 1.0 modify xxx . /// *************************************************************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;using infoFlat.App_Code.Database;public partial class InterFace_Left : System.Web.UI.Page...{ protected void Page_Load(object sender, EventArgs e) ...{ // 获取Session中的用户ID String userId = Convert.ToString(Session["userId"]); LabelUserId.Text = userId; // 初始化功能树 InitFuncTree(); AllOverTree(TreeViewFuncList.Nodes); } private void InitFuncTree() ...{ SqlConnection conn = DbConn.GetConn(); SqlDataAdapter adp = new SqlDataAdapter("select * from sysFunction", conn); DataSet ds = new DataSet(); try ...{ adp.Fill(ds); } catch (Exception ex) ...{ ex.ToString(); } finally ...{ conn.Close(); } this.ViewState["ds"] = ds; AddTree(0, (TreeNode)null); } //递归添加树的节点 private void AddTree(int ParentFunctionId, TreeNode pNode) ...{ DataSet ds = (DataSet)this.ViewState["ds"]; DataView dvTree = new DataView(ds.Tables[0]); //过滤ParentFunctionId,得到当前的所有子节点 dvTree.RowFilter = "[ParentFunctionId] = " + ParentFunctionId; foreach (DataRowView Row in dvTree) ...{ TreeNode Node = new TreeNode(); //添加根节点 if (pNode == null) ...{ Node.Text = Row["FunctionName"].ToString(); TreeViewFuncList.Nodes.Add(Node); Node.Expanded = true; //从根节点开始递归 AddTree(Int32.Parse(Row["FunctionId"].ToString()), Node); } else ...{ //̀添加当前节点的子节点 Node.Text = Row["FunctionName"].ToString(); pNode.ChildNodes.Add(Node); Node.Expanded = true; //再次递归 AddTree(Int32.Parse(Row["FunctionId"].ToString()), Node); } } } protected void AllOverTree(TreeNodeCollection tnc) ...{ foreach(TreeNode node in tnc) ...{ if (node.ChildNodes.Count != 0) ...{ AllOverTree(node.ChildNodes); } else //在叶子节点设置其NavigateUrl ...{ setNavigateUrl(node); //node.NavigateUrl = "~/InterFace/FunctionChoose.aspx?" + node.Text; } } } private void setNavigateUrl(TreeNode node) ...{ if (node.Text.Equals("新闻")) ...{ node.NavigateUrl = "~/InterFace/News.aspx"; } if (node.Text.Equals("通知")) ...{ node.NavigateUrl = "~/InterFace/Notice.aspx"; } else ...{ node.NavigateUrl = "~/InterFace/Others.aspx"; } }}
测试通过：
网页显示如下：
 |
系统功能 |
 |
信息中心 |
 |
 |
新闻 |
| |
|
通知 |
| |
 |
公告 |
|
项目中心 |
| |
|
申报 |
| |
|
审批 |
| |
|
过程 |
| |
|
结题 |
 |
产品中心 |
|
在研产品 |