1 前台js： 2 var treeNodes; 3 $.ajax({ 4     async: false, 5     cache: false, 6     type: ‘POST‘, 7     contentType: "application/json", 8     url: "/MsgTypeTemItem/GetAllStr?temId=" + $("#temId").val(), //请求的action路径 9     error: function () {//请求失败处理函数  10          alert(‘请求失败‘);11     },12     success: function (data) { //请求成功后处理函数13          data = http://www.mamicode.com/"[" + data + "]";14          treeNodes = eval(data);//格式化（object）数据15     }16 });17 $.fn.zTree.init($("#treeDemo"), setting, treeNodes);18 后台Controller：19 public string GetAllStr()20         {21             string temId = Request.QueryString["temId"];22             List<MsgTypeTemItem> allList = msgTypeItemService.GetAll();23             string querySql = "select * from MessageTempletItem where TempletId=‘" + temId + "‘";24             DataTable dt = sqlHelper.GetDataTable(querySql);25             string result = string.Empty;26             foreach (DataRow dr in dt.Select("FatherId=‘0‘"))27             {28                 result += AppendJson(dr, dt);29             }30             int index = result.LastIndexOf("\r\n");31             if (result.Length > 0)32                 result = result.Substring(0, index - 1);33             return result;34         }35         private static string AppendJson(DataRow dr, DataTable dtAll)36         {37             string parentNode = string.Empty;38             string isTrue = "false";39             parentNode = "{id:\‘{id}\‘, pId:\‘{pId}\‘, name:\‘{name}\‘, open:" + isTrue + ", drag:true" + "},\r\n";40             parentNode = parentNode.Replace("{id}", dr["ItemId"].ToString()).Replace("{pId}", dr["FatherId"].ToString()).Replace("{name}", dr["ItemContent"].ToString());41             DataRow[] rows = dtAll.Select("FatherId=‘" + dr["ItemId"].ToString().Trim() + "‘");42             if(rows.Length!=0)43             {44                 foreach (DataRow row in rows)45                 {46                     parentNode += AppendJson(row, dtAll);47                 }48             }49             return parentNode;50         }51 注意：①.要后台数据进行eval（object化）--eval52 eval前：[{id:‘y1‘,pId:‘0‘,name:‘y1‘,drag:true},{id:‘y11‘,pId:‘y1‘,name:‘y11‘,drag:true},{id:‘y2‘,pId:‘0‘,name:‘y2‘,drag:true}]53 eval后：[object Object],[object Object],[object Object]
相关知识点①：eval
var code1=‘"a" + 2‘; //表达式 
var code2=‘{a:2}‘; //语句 
var code3=[{a:1,b:2},{a:2,b:3}];
alert(eval(code1)); //->‘a2‘ 
alert(eval(code2)); //->undefined 
alert(eval(‘(‘ + code2 + ‘)‘)); //->[object Object] 
alert(eval(code3));//->[object Object],[object Object]