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ASP.NET 递归将分类绑定到 TreeView

2010-12-14 10:38 405 查看

原始问题来源：http://topic.csdn.net/u/20101213/10/e0616370-4790-4542-816e-2ee960defbc0.html

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

<!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>
<asp:TreeView ID="treeMenu" runat="server">
</asp:TreeView>
</div>
</form>
</body>
</html>

using System;

using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page
{
private readonly string ConnString = @"server=.\MSSQLSERVER2008;database=chart;uid=sa;pwd=123456";
private DataTable dt = null;
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
dt = new DataTable();
GetMenuToDataTable("select * from sysMenuTree",dt);
BindTree(dt,null,"0");
}
}

private void BindTree(DataTable dtSource,TreeNode parentNode,string parentID)
{
DataRow[] rows = dtSource.Select(string.Format("ParentID={0}",parentID));
foreach(DataRow row in rows)
{
TreeNode node = new TreeNode();
node.Text = row["sText"].ToString();
node.Value = row["sValue"].ToString();
BindTree(dtSource,node,row["NoteId"].ToString());
if(parentNode == null)
{
treeMenu.Nodes.Add(node);
}
else
{
parentNode.ChildNodes.Add(node);
}
}
}

private DataTable GetMenuToDataTable(string query,DataTable dt)
{
using(SqlConnection conn = new SqlConnection(ConnString))
{
SqlCommand cmd = new SqlCommand(query,conn);
SqlDataAdapter ada = new SqlDataAdapter(cmd);
ada.Fill(dt);
}
return dt;
}
}

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