asp:treeview获取点击的值(无内容)

来源：互联网发布：php访问sql server 编辑：程序博客网时间：2024/05/18 15:24

前台代码:

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

<!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">
    <asp:HiddenField ID="lbl2" runat="server" />
    <div style="width:80%; height:80px; overflow:scroll;">
        <asp:TreeView ID="tv1" runat="server"></asp:TreeView>
    </div>
    <input type="button" value="返回" onclick="javascript:alert(document.getElementById('lbl2').value);" />
    </form>
</body>
</html>

后台代码:

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;

public partial class tv : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

        this.tv1.SelectedNodeChanged += new EventHandler(tv_SelectedNodeChanged);
        //this.lbl.ClientID
        if (!IsPostBack)
        {
            this.tv1.Nodes.Add(new TreeNode("aaa", "aaa"));
            this.tv1.Nodes.Add(new TreeNode("bbb", "bbb"));
            this.tv1.Nodes.Add(new TreeNode("1", "1"));
            this.tv1.Nodes.Add(new TreeNode("2", "2"));
            this.tv1.Nodes.Add(new TreeNode("3", "3"));
            this.tv1.Nodes.Add(new TreeNode("4", "4"));
        }
    }

    void tv_SelectedNodeChanged(object sender, EventArgs e)
    {
        this.lbl2.Value = ((TreeView)sender).SelectedNode.Value;
        Response.Write("改变事件"+((TreeView)sender).SelectedNode.Value);
    }
}