利用TreeView控件 从数据库中动态载入数据
日期：2012-08-29 浏览次数：20831 次
//************************* aspx *************************//
<%@ Page language="c#" Codebehind="WebForm1.aspx.cs" AutoEventWireup="false" Inherits="TreeTest.WebForm1" %>
<%@ Register TagPrefix="iewc" Namespace="Microsoft.Web.UI.WebControls" Assembly="Microsoft.Web.UI.WebControls" %>
<HTML>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<FONT face="宋体">
<iewc:TreeView id="TreeView1" style="Z-INDEX: 101; LEFT: 8px; POSITION: absolute; TOP: 16px" runat="server"
AutoPostBack="True"></iewc:TreeView>
<asp:Label id="Label1" style="Z-INDEX: 102; LEFT: 440px; POSITION: absolute; TOP: 56px" runat="server"
Width="152px" Height="64px">Label</asp:Label>
<asp:Label id="Label2" style="Z-INDEX: 103; LEFT: 456px; POSITION: absolute; TOP: 144px" runat="server"
Width="144px" Height="48px">Label</asp:Label>
<asp:Label id="Label3" style="Z-INDEX: 104; LEFT: 696px; POSITION: absolute; TOP: 64px" runat="server">Label</asp:Label></FONT>
</form>
</body>
</HTML>
//***************************** CS *************************//
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.OleDb;
using Microsoft.Web.UI.WebControls;
namespace TreeTest
{
/// <summary>
/// WebForm1 的摘要说明。
/// </summary>
public class WebForm1 : System.Web.UI.Page
{
protected Microsoft.Web.UI.WebControls.TreeView TreeView1;
protected System.Web.UI.WebControls.Label Label1;
protected System.Web.UI.WebControls.Label Label2;
protected System.Web.UI.WebControls.Label Label3;
OleDbConnection Con ;
string dataConStr = "";
private void Page_Load(object sender, System.EventArgs e)
{
dataConStr = "Provider=microsoft.jet.oledb.4.0;Data Source="+Server.MapPath("tree.mdb")+";User ID=;Password=;";
Con = new OleDbConnection(dataConStr);
if(!IsPostBack)
{
TreeNode node = new TreeNode();
node.Text = "根";
node.NodeData = "0";
TreeView1.Nodes.Add(node); // 添加根
AddTestNodes(node); //添加"展开..."节点
}
}
private void AddTestNodes(TreeNode node)
{
TreeNode testnode = new TreeNode();
testnode.Text = "正在展开....";
testnode.NodeData = "testnode";
node.Nodes.Add(testnode);
}
private void AddNodes(TreeNode node)
{
string parentID = "0";
if(node.Parent != null)
{
parentID = node.NodeData;
}
// deeptree 为表名
string cmdstr = "select * from deeptree where parentid="+parentID;
OleDbCommand cmd = new OleDbCommand(cmd
