[{    "id":1,    "text":"评分项目",    "children":[{                  "id":11,                  "text":"项目一",                  "state":"closed",                  "children":[{                               "id":111,                               "text":"项目分支1",                               "state":"closed",                               "children":[{                                             "id":1111,                                             "text":"项目底层"                                         }]                               },{                               "id":112,                               "text":"项目分支2",                               "state":"closed",                               "children":[{                                             "id":1121,                                             "text":"项目底层"                                         }]                               }]                },{                    "id":12,                    "text":"项目二",                    "state":"closed",                    "children":[{                                 "id":121,                                 "text":"尺寸",                                 "state":"closed",                                 "children":[{                                               "id":1211,                                               "text":"方向"                                            },{                                               "id":1212,                                               "text":"方向2"                                            },{                                               "id":1213,                                               "text":"距离"                                            },{                                               "id":1214,                                               "text":"距离2"                                            }]                               }]                    } }]

前台设定载入代码如下：
       $(function () {             $('#BiaoZhun').tree({                 url: 'BiaoZhunTree.ashx',                // loadFilter: function(data){                    //    if (data.d){                    //        return data.d;                    //    } else {                    //        return data;                    //    }                    //}              });            });

网页DOM节点设置如下：

XML/HTML code?12 <ul id="BiaoZhun"></ul>
1.json倒数第二个符号'}'改为'}]'
2.URL后面的','去掉（因为后面的代码被你注释了）