我需要把一张表以easyui树的形式显示，求教

Question

我需要把一张表以easyui树的形式显示，该表有parentId，看图
前台我是这样写的

  jQuery(function() {
           $('#tree').tree({
               url: '../Handlers/ECTree.ashx',
               method: 'get',
               animate:true,
               loadFilter: function (data) { 
                   if (data.d) {
                       return data.d;
                   } else {
                       return data;
                   }
               }
           });
       });

请问在一般处理文件里我怎么才能拿到该表的数据并转换成tree能识别的json数据呢？我就是不知道在后台该怎么写，我是一个刚入门的程序员，求大神指点吧，谢谢了！

Answer 1

    $(function(){

        $("#tt").treegrid({    
            url:'jingZhiTongJi!selectJingZhiTongJi',      
            idField:'treeID', 
            width:1214,
            height:524,   
            treeField:'xiangMuName',
            toolbar: "#content",    
            columns:[[    

                {title:'项目名',field:'xiangMuName',width:150,align:'center'}, 
                {title:'项目代码',field:'shangShiDaiMa',width:130,align:'right'},   
                {title:'上市代码',field:'shangShiDaiMa',width:130,align:'center'},
                {title:'票面值/股数',field:'quantity',width:105,align:'center'},
                {title:'行情价格',field:'hangQingJia',width:105,align:'center'},
                {title:'成本',field:'chengBen',width:105,align:'center'},
                {title:'市值',field:'shiZhi',width:105,align:'center'},
                {title:'估值增值',field:'guZhiZengZhi',width:105,align:'center'}
                ]] 

        });

    });