[TreeGrid] ASP.NET MVC中使用jQuery EasyUI TreeGrid教程

mikel 2011-11-28
  1. 程序要求:

jQuery EasyUI 插件:http://www.jeasyui.com/download/index.php

  1. 具体内容:

引用部分代码:

<link rel="stylesheet" type="text/css" href="../themes/default/easyui.css">

<link rel="stylesheet" type="text/css" href="../themes/icon.css">

<link rel="stylesheet" type="text/css" href="demo.css">

<script type="text/javascript" src="../jquery-1.6.min.js"></script>

<script type="text/javascript" src="../jquery.easyui.min.js"></script>

前台页面部分:

        <table id="grid" toolbar="#toolbar" class="easyui-treegrid" style="width:700px;height:300px" url="/Area/List" idField="Identifier" treeField="Area_Name" fitColumns="true" pagination="true">

               <thead>

                       <tr>

                               <th field="Area_Name" rowspan="2" width="150" editor="text">地区</th>

                       </tr>

               </thead>

        </table>

   ASP.NET MVC 的控制器代码:

        public JsonResult List(string page, string rows)

        {

            List<Area> areas = new BusinessLogic().Select<Area>();

            List<Object> result = new List<object>();

            foreach (Area a in areas)

            {

                if (a._parentId.Equals(0))

                {

                    result.Add(new { Identifier = a.Identifier, Area_Name = a.Area_Name });

                }

                else

                {

                    result.Add(new { Identifier = a.Identifier, Area_Name = a.Area_Name, _parentId = a._parentId });

                }

            }

            Dictionary<string, object> json = new Dictionary<string, object>();

            json.Add("total",areas.Count);

            json.Add("rows",result);

 

            return Json(json);

        }

注意控制器Action返回的是Json格式的数据格式如下:

{"total":3,"rows":[{"Identifier":1,"Area_Name":"唐山市"}, {"Identifier":11,"Area_Name":"路北区","_parentId":1}, {"Identifier":2,"Area_Name":"河北省"}]}

如果直接利用ASP.NET MVC的Json转换函数得到的Json数据没有total值,不会显示出树形结构,因为TreeGrid需要total的数值,Json(areas)得到的结果如下:

[{"Identifier":1,"Area_Name":"唐山市"},{"Identifier":11,"Area_Name":"路北区","_parentId":1},{"Identifier":2,"Area_Name":"河北省"}]

 就是因为这个数据格式的问题,纠结了半天没有搞定,后来对照treegrid的例子将数据格式统一了才显示出来

 注意:一定要在treegrid的html标签中声明url属性的值,否则在$(function(){})中不会显示数据,可能是因为treegrid初始化规定只能在加载页面解析

原文地址:http://www.mikel.cn/

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