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从数据库读取数据动态生成树形菜单示例

2012-09-11 12:27 1106 查看

用C#从数据库读取数据，动态生成树形菜单例子

数据库表

前台代码

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

<!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 id="Head1" runat="server">
<title>树形</title>
<style type="text/css">
body{background:#ecefff}
.navPoint{COLOR:#666;CURSOR:hand;FONT-FAMILY:Webdings; FONT-SIZE:9pt}
.NiuNiutree{width:232px; height:525px; overflow:auto;}
</style>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TreeView ID="tree" runat="server" CssClass="NiuNiutree">
</asp:TreeView>
</div>
</form>
</body>
</html>

后台代码

using System;
using System.Data;
using System.Data.SqlClient;
using System.Data.Odbc;
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;
using System.Data.OracleClient;

public partial class demo : System.Web.UI.Page
{
private SQLHelper sqlHelper;
protected void Page_Load(object sender, EventArgs e)
{
sqlHelper = new SQLHelper();
if (!Page.IsPostBack)
{

tree.ShowLines = true;
tree.ShowExpandCollapse = true;
TreeNodeCollection tnc = new TreeNodeCollection();
tnc = tree.Nodes;
//开始调用tncXunHuan，数据库中fuid=9999为根节点
tncXunHuan(tnc, 9999);
}

}
//树形菜单
public void tncXunHuan(TreeNodeCollection tnc, int fuid)
{

try
{
DataSet ds = new DataSet();
string sql = "select id,fuid,the from sys_organ where fuid='" + fuid + "'";
ds = sqlHelper.getDataSet(sql);
// ----------------end------------数据库获取数据
//------------------start-----------根据数据结构向treeView添加节点
foreach (DataRow dr in ds.Tables[0].Rows)
{
int id = Convert.ToInt16(dr["id"]);
int Fuid = Convert.ToInt16(dr["fuid"]);
string the = dr["the"].ToString();
TreeNode tn = new TreeNode();
tn.Text = the;
tn.NavigateUrl = "javascript:getBoundary('" + the + "')";//调用前台js方法
tn.ImageUrl = "images/file.png";//默认图标为file.png
tnc.Add(tn);
int tncInt = ds.Tables[0].Rows.IndexOf(dr);
tncXunHuan(tnc[tncInt].ChildNodes, id); //----------递归调用
// tnc = tnc;
}
//------------------end-----------根据数据结构向treeView添加节点
//------------------start---------设置包含子节点的父节点的图标
if (ds.Tables[0].Rows.Count > 0)
{
tnc[0].Parent.ImageUrl = "images/openfoldericon.png";//设置父文件图标

}
else
{

tnc[0].Parent.ImageUrl = "images/file.png";
}

}
catch (Exception e) { return; }
}

}

数据库操作文件 sqlHelper

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.OracleClient;

/// <summary>
///Class1 的摘要说明
/// </summary>
public class SQLHelper
{
public SQLHelper()
{
//
//TODO: 在此处添加构造函数逻辑
//
}
private static string GetConnectionString()
{
return "Data Source=wgyx;user=wgyx;password=wgyx;";
}
/// <summary>
/// 返回查询的数据集
/// </summary>
/// <param name="sql"></param>
/// <returns></returns>
public DataSet getDataSet(String sql)
{
DataSet ds = new DataSet();
OracleConnection oraConn = null;
try
{
oraConn = new OracleConnection(GetConnectionString());
oraConn.Open();
OracleDataAdapter oraDa = new OracleDataAdapter(sql, oraConn);
oraDa.Fill(ds);
}
catch
{
return null;
}
finally
{
oraConn.Close();
}
return ds;
}
/// <summary>
/// OracleDataReader
/// </summary>
/// <param name="sql"></param>
/// <returns></returns>
public OracleDataReader getDataReader(String sql)
{

OracleDataReader oraDr;
OracleConnection oraConn = null;
OracleCommand oraCmd=null;
try
{
oraConn = new OracleConnection(GetConnectionString());
oraConn.Open();
oraCmd= new OracleCommand(sql, oraConn);
oraDr = oraCmd.ExecuteReader();

}
catch
{
return null;
}
finally
{

oraConn.Close();

}
return oraDr;
}

}

效果图

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