C#-->Tree目录的实现

tree.aspx.cs

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 My_Class;
using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page
{
     My_Class.Arr bmArray = new Arr();
     protected void Page_Load(object sender, EventArgs e)
     {
         if (!Page.IsPostBack)
         {
             AddDynamicItems();//画树
         }
     }
     #region //画树
     private void AddDynamicItems()//画树
     {
         SqlConnection myconn = new SqlConnection();
         myconn.ConnectionString = System.Configuration.ConfigurationManager.AppSettings["sqlserver"];
         myconn.Open();
         SqlCommand cmd = myconn.CreateCommand();
         SqlDataReader rec = null;

         cmd.CommandText = "select dwbm,dwmc,sjdwbm from TREE order by dwbm";
         rec = cmd.ExecuteReader();
         while (rec.Read())
         {
             bmArray.Add(rec["dwbm"].ToString(), rec["dwmc"].ToString(), rec["sjdwbm"].ToString());
         }
         rec.Close();

         cmd.CommandText = "select dwbm,dwmc from TREE where sjdwbm is null order by dwbm";
         rec = cmd.ExecuteReader();
         Microsoft.Web.UI.WebControls.TreeNode newNode = null;
         while (rec.Read())
         {
             newNode = new Microsoft.Web.UI.WebControls.TreeNode();
             newNode.Text = rec["dwmc"].ToString() + rec["dwbm"].ToString();
             newNode.NodeData = rec["dwbm"].ToString();
             DrawcomTree(rec["dwbm"].ToString(), newNode);
             my_tree.Nodes.Add(newNode);

         }
         rec.Close();
         cmd.Dispose();
         myconn.Close();
         myconn.Dispose();

     }
     private void DrawcomTree(string dwbm, Microsoft.Web.UI.WebControls.TreeNode treeNode)//画树的递归函数
     {
         Microsoft.Web.UI.WebControls.TreeNode childNode;
         for (int i = 0; i < bmArray.Count; i++)
         {
             if (bmArray.getSjbm(i).ToString() == dwbm)
             {
                 childNode = new Microsoft.Web.UI.WebControls.TreeNode();
                 childNode.Text = "(" + bmArray.getBm(i).ToString() + ")" + bmArray.getMc(i).ToString();
                 childNode.NodeData = bmArray.getBm(i).ToString();
                 treeNode.Nodes.Add(childNode);
                 //treeNode.Expanded =true;
                 DrawcomTree(bmArray.getBm(i).ToString(), childNode);
             }
         }
     }
     #endregion
}
Tree.aspx

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

<%@ Register Assembly="Microsoft.Web.UI.WebControls" Namespace="Microsoft.Web.UI.WebControls"
TagPrefix="iewc" %>

<!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>
</head>
<body>
<form id="form1" runat="server">
<div>
<iewc:TreeView ID="my_tree" runat="server" SystemImagesPath="webctrl_client/1_0/treeimages/"></iewc:TreeView></div>
</form>
</body>
</html>
http://hi.baidu.com/jilijun/blog/item/b359e73df0147cc69e3d6249.html

posted on 2007-04-25 13:02 mbskys 阅读(350) 评论(0) 收藏举报