//html页面
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="test.aspx.cs" Inherits="test" %>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
</head>
<script>
function postBackObject()
{
var o = window.event.srcElement;
if (o.tagName == "INPUT" && o.type == "checkbox") //点击treeview的checkbox是触发
{
__doPostBack("","");
}
}
</script>
<body>
<form id="form1" runat="server">
<div>
<asp:TreeView ID="TreeView1" runat="server" PopulateNodesFromClient="False" onclick="postBackObject()" ShowCheckBoxes="All" OnTreeNodeCheckChanged="TreeView1_TreeNodeCheckChanged">
</asp:TreeView>
</div>
</form>
</body>
</html>
//后台代码
using System;
using System.Data;
using System.Data.SqlClient;
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 test : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
DataTable dt1 = SqlDAL.department.listProvince();
foreach (DataRow row1 in dt1.Rows)
{
TreeNode tn = new TreeNode();
tn.Text = row1["RP_Name"].ToString();
tn.Value = row1["RP_Id"].ToString();
this.TreeView1.Nodes.Add(tn);
DataTable dt2 = SqlDAL.department.listCity(Convert.ToInt32(row1["RP_Id"]));
foreach (DataRow row2 in dt2.Rows)
{
TreeNode tn2 = new TreeNode();
tn2.Text = row2["RC_Name"].ToString();
tn2.Value = row2["RC_Id"].ToString();
tn.ChildNodes.Add(tn2);
DataTable dt3 = SqlDAL.department.listContry(Convert.ToInt32(row2["RC_Id"]));
foreach (DataRow row3 in dt3.Rows)
{
TreeNode tn3 = new TreeNode();
tn3.Text = row3["RCY_Name"].ToString();
tn3.Value = row3["RCY_Id"].ToString();
tn2.ChildNodes.Add(tn3);
}
}
}
}
}
protected void TreeView1_TreeNodeCheckChanged(object sender, TreeNodeEventArgs e)
{
SetChildChecked(e.Node);
}
private void SetChildChecked(TreeNode parentNode)
{
foreach (TreeNode tn in parentNode.ChildNodes)
{
tn.Checked = parentNode.Checked;
if(tn.ChildNodes.Count>0)
{
SetChildChecked(tn);
}
}
}
}
//获取最末节点的值
protected void Button1_Click(object sender, EventArgs e)
{
for (int i = 0; i < this.TreeView1.Nodes.Count; i++)
{
if (TreeView1.Nodes[i].Checked == true)
{
for (int j = 0; j < this.TreeView1.Nodes[i].ChildNodes.Count; j++)
{
if (this.TreeView1.Nodes[i].ChildNodes[j].Checked == true)
{
for (int k = 0; k < this.TreeView1.Nodes[i].ChildNodes[j].ChildNodes.Count; k++)
{
if (this.TreeView1.Nodes[i].ChildNodes[j].ChildNodes[k].Checked == true)
{
Response.Write(this.TreeView1.Nodes[i].ChildNodes[j].ChildNodes[k].Value.ToString());
}
}
}
}
}
}
}