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ASP.NET高级应用之　(站点导航SiteMapPath控件)

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前台：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="TreeDemo3.aspx.cs" Inherits="TreeViewDemo.TreeDemo3" %>

<!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></title>

</head>

<body>

<form id="form1" runat="server">

<div>

</div>

<asp:TreeView ID="TreeView1" runat="server">

</asp:TreeView>

</form>

</body>

</html>

后台：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Configuration;

using System.Data;

using System.Data.SqlClient;

namespace TreeViewDemo

{

public partial class TreeDemo3 : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

bindTree();

}

private void bindTree()

{

DataTable dt = this.GetTreeData();

this.FillNode(dt, null);

}

private void FillNode(DataTable dt, TreeNode node)

{

DataView dv = new DataView(dt);

if (node == null) //根结点

{

dv.RowFilter = "parentid='0'"; //筛选到根结点的所有子节点

}

else //不是根结点

{

dv.RowFilter = "parentid='" + node.Value + "'"; //筛选对应节点的所有子节点

}

foreach (DataRowView drv in dv) //遍历填充节点的所有子节点，如果传入的节点node为叶子节点，遍历要退出，不再进行递归

{

TreeNode no = new TreeNode(drv["menuname"].ToString(), drv["menuid"].ToString());

FillNode(dt, no); //填充no节点的子节点

if (node == null)

{

this.TreeView1.Nodes.Add(no);

}

else

{

node.ChildNodes.Add(no);

}

}

}

private DataTable GetTreeData()

{

string strcnn = ConfigurationManager.ConnectionStrings["treeCon"].ConnectionString;

using (SqlConnection sqlcnn = new SqlConnection(strcnn))

{

SqlCommand sqlcmm = sqlcnn.CreateCommand();

sqlcmm.CommandText = "select * from MenuTree order by parentid,menuorder";

SqlDataAdapter da = new SqlDataAdapter(sqlcmm);

DataSet ds = new DataSet();

da.Fill(ds);

return ds.Tables[0];

}

}

}

}

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ASP.NET高级应用之 (站点导航SiteMapPath控件)

ASP.NET高级应用之　(站点导航SiteMapPath控件)