EasyUI Tree+Asp.net实现权限树或目录树导航的简单实例

复制代码代码如下:

<%@ 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">

<head>

<title>网站后台通用管理系统，<%=adminname%>，您好！</title>

$(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>

</noscript>

</div>

<span><img src="images/blocks.gif" width="20" height="20" align="absmiddle" />网站后台通用管理系统 V1.0</span> </div>

</div>

</div>

<div title="欢迎使用" > <span>欢迎进入系统</span> </div>

</div>

<div id="mm-tabcloseother">除此之外全部关闭</div>

<div id="mm-tabcloseright">当前页右侧全部关闭</div>

<div id="mm-tabcloseleft">当前页左侧全部关闭</div>

</div>

</form>

</body>

</html>

复制代码代码如下:

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

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