EasyUI Tree+Asp.net实现权限树或目录树导航的简单实例

代码如下:

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

<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>网站后台通用管理系统，<%=adminname%>，您好！</title>
<link href="Css/default.css" rel="stylesheet" type="text/css" />
<!–easyui–>
<link rel="stylesheet" type="text/css" href="easyui/themes/default/easyui.css" />
<link rel="stylesheet" type="text/css" href="easyui/themes/default/tree.css" />
<link rel="stylesheet" type="text/css" href="easyui/themes/icon.css" />
<script type="text/javascript" src="easyui/jquery-1.8.0.min.js"></script>
<script type="text/javascript" src="easyui/jquery.easyui.min.js"></script>
<script type="text/javascript" src='EasyUI/JQLoader.js'> </script>
<script type="text/javascript" src='EasyUI/outlook.js'> </script>
<script type="text/javascript">
$(function () {
$('#lefttree').tree({
animate: true,
checkbox: false,
url: 'GetTreeDataFromDB.ashx?father=0',
onClick: function (node) {
if (node.attributes != "") {
addTab(node.text, node.attributes, node.id);
}
},
onLoadSuccess: function (node, data) {
$('#lefttree').show();
}
});

$('#loginOut').click(function () {
$.messager.confirm('系统提示', '您确定要退出本次登录吗?', function (r) {
if (r) {
location.href = 'LoginExit.ashx';
}
});
})
});
</script>
</head>
<body class="easyui-layout" style="overflow-y: hidden" scroll="no">
<form id="form1" runat="server">
<noscript>
<div style=" position:absolute; z-index:100000; height:2046px;top:0px;left:0px; width:100%; background:white; text-align:center;"> <img src="images/noscript.gif" style=\”margin: 3px auto 0px; padding: 0px 3px; outline: none; line-height: 25.2px; font-size: 14px; background: rgb(242, 246, 251); width: 640px; clear: both; border-top: 1px solid rgb(0, 153, 204); border-right: 1px solid rgb(0, 153, 204); border-left: 1px solid rgb(0, 153, 204); border-image: initial; border-bottom: none; font-family: tahoma, arial, "Microsoft YaHei";\”>
复制代码代码如下:

<%@ WebHandler Language="C#" Class="GetTreeDataFromDB" %>

using System;
using System.Web;
using System.Configuration;
using System.Data;
using System.Text;
using System.Collections.Generic;
//add
using System.Web.Script.Serialization;

public class GetTreeDataFromDB : IHttpHandler
{

public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";

//获取数据库中的分类数据
string fatherid = context.Request.QueryString["father"];
DataTable dt = createDT();

string json = GetTreeJsonByTable(dt, "module_id", "module_name","module_url", "module_fatherid", "0");
context.Response.Write(json);
context.Response.End();
}

#region 根据DataTable生成EasyUI Tree Json树结构
StringBuilder result = new StringBuilder();
StringBuilder sb = new StringBuilder();
/// <summary>
/// 根据DataTable生成EasyUI Tree Json树结构
/// </summary>
/// <param name="tabel">数据源</param>
/// <param name="idCol">ID列</param>
/// <param name="txtCol">Text列</param>
/// <param name="url">节点Url</param>
/// <param name="rela">关系字段</param>
/// <param name="pId">父ID</param>
private string GetTreeJsonByTable(DataTable tabel, string idCol, string txtCol, string url, string rela, object pId)
{
result.Append(sb.ToString());
sb.Clear();
if (tabel.Rows.Count > 0)
{
sb.Append("[");
string filer = string.Format("{0}='{1}'", rela, pId);
DataRow[] rows = tabel.Select(filer);
if (rows.Length > 0)
{
foreach (DataRow row in rows)
{
sb.Append("{\\"id\\":\\"" + row[idCol] + "\\",\\"text\\":\\"" + row[txtCol] + "\\",\\"attributes\\":\\"" + row[url] + "\\",\\"state\\":\\"open\\"");
if (tabel.Select(string.Format("{0}='{1}'", rela, row[idCol])).Length > 0)
{
sb.Append(",\\"children\\":");
GetTreeJsonByTable(tabel, idCol, txtCol,url, rela, row[idCol]);
result.Append(sb.ToString());
sb.Clear();
}
result.Append(sb.ToString());
sb.Clear();
sb.Append("},");
}
sb = sb.Remove(sb.Length – 1, 1);
}
sb.Append("]");
result.Append(sb.ToString());
sb.Clear();
}
return result.ToString();
}
#endregion

#region 创建数据
protected static DataTable createDT()
{
DataTable dt = new DataTable();
dt.Columns.Add("module_id");
dt.Columns.Add("module_name");
dt.Columns.Add("module_fatherid");
dt.Columns.Add("module_url");
dt.Columns.Add("module_order");

dt.Rows.Add("C1", "全国", "0", "1.aspx", "1");
dt.Rows.Add("M01", "广东", "C1", "2.aspx", "1");

dt.Rows.Add("M0101", "深圳", "M01", "3.aspx", "100");
dt.Rows.Add("M010101", "南山区", "M0101", "4.aspx", "1000");
dt.Rows.Add("M010102", "罗湖区", "M0101", "", "1001");
dt.Rows.Add("M010103", "福田区", "M0101", "", "1002");
dt.Rows.Add("M010104", "宝安区", "M0101", "", "1003");
dt.Rows.Add("M010105", "龙岗区", "M0101", "", "1004");

dt.Rows.Add("M01010301", "上梅林", "M010103", "", "1002001");
dt.Rows.Add("M01010302", "下梅林", "M010103", "", "1002002");
dt.Rows.Add("M01010303", "车公庙", "M010103", "", "1002003");
dt.Rows.Add("M01010304", "竹子林", "M010103", "", "1002004");
dt.Rows.Add("M01010305", "八卦岭", "M010103", "", "1002005");
dt.Rows.Add("M01010306", "华强北", "M010103", "", "1002006");

dt.Rows.Add("M0102", "广州", "M01", "", "101");
dt.Rows.Add("M010201", "越秀区", "M0102", "", "1105");
dt.Rows.Add("M010202", "海珠区", "M0102", "", "1106");
dt.Rows.Add("M010203", "天河区", "M0102", "", "1107");
dt.Rows.Add("M010204", "白云区", "M0102", "", "1108");
dt.Rows.Add("M010205", "黄埔区", "M0102", "", "1109");
dt.Rows.Add("M010206", "荔湾区", "M0102", "", "1110");
dt.Rows.Add("M010207", "罗岗区", "M0102", "", "1111");
dt.Rows.Add("M010208", "南沙区", "M0102", "", "1112");
return dt;
}
#endregion

public bool IsReusable
{
get
{
return false;
}
}
}

复制代码代码如下:

#region 根据DataTable生成EasyUI Tree Json树结构
StringBuilder result = new StringBuilder();
StringBuilder sb = new StringBuilder();
/// <summary>
/// 根据DataTable生成EasyUI Tree Json树结构
/// </summary>
/// <param name="tabel">数据源</param>
/// <param name="idCol">ID列</param>
/// <param name="txtCol">Text列</param>
/// <param name="url">节点Url</param>
/// <param name="rela">关系字段</param>
/// <param name="pId">父ID</param>
private string GetTreeJsonByTable(DataTable tabel, string idCol, string txtCol, string url, string rela, object pId)
{
result.Append(sb.ToString());
sb.Clear();
if (tabel.Rows.Count > 0)
{
sb.Append("[");
string filer = string.Format("{0}='{1}'", rela, pId);
DataRow[] rows = tabel.Select(filer);
if (rows.Length > 0)
{
foreach (DataRow row in rows)
{
sb.Append("{\\"id\\":\\"" + row[idCol] + "\\",\\"text\\":\\"" + row[txtCol] + "\\",\\"attributes\\":\\"" + row[url] + "\\"");
if (tabel.Select(string.Format("{0}='{1}'", rela, row[idCol])).Length > 0)
{
//点击展开
sb.Append(",\\"state\\":\\"closed\\",\\"children\\":");
GetTreeJsonByTable(tabel, idCol, txtCol,url, rela, row[idCol]);
result.Append(sb.ToString());
sb.Clear();
}
result.Append(sb.ToString());
sb.Clear();
sb.Append("},");
}
sb = sb.Remove(sb.Length – 1, 1);
}
sb.Append("]");
result.Append(sb.ToString());
sb.Clear();
}
return result.ToString();
}
#endregion