zTree的后台数据绑定

 前台js：
 var treeNodes;
 $.ajax({
     async: false,
     cache: false,
     type: 'POST',
     contentType: "application/json",
     url: "/MsgTypeTemItem/GetAllStr?temId=" + $("#temId").val(), //请求的action路径
     error: function () {//请求失败处理函数
          alert('请求失败');
     },
     success: function (data) { //请求成功后处理函数
          data = "[" + data + "]";
          treeNodes = eval(data);//格式化（object）数据
     }
 });
 $.fn.zTree.init($("#treeDemo"), setting, treeNodes);
 后台Controller：
 public string GetAllStr()
         {
             string temId = Request.QueryString["temId"];
             List<MsgTypeTemItem> allList = msgTypeItemService.GetAll();
             string querySql = "select * from MessageTempletItem where TempletId='" + temId + "'";
             DataTable dt = sqlHelper.GetDataTable(querySql);
             string result = string.Empty;
             foreach (DataRow dr in dt.Select("FatherId='0'"))
             {
                 result += AppendJson(dr, dt);
             }
             int index = result.LastIndexOf("\r\n");
             if (result.Length > )
                 result = result.Substring(, index - );
             return result;
         }
         private static string AppendJson(DataRow dr, DataTable dtAll)
         {
             string parentNode = string.Empty;
             string isTrue = "false";
             parentNode = "{id:\'{id}\', pId:\'{pId}\', name:\'{name}\', open:" + isTrue + ", drag:true" + "},\r\n";
             parentNode = parentNode.Replace("{id}", dr["ItemId"].ToString()).Replace("{pId}", dr["FatherId"].ToString()).Replace("{name}", dr["ItemContent"].ToString());
             DataRow[] rows = dtAll.Select("FatherId='" + dr["ItemId"].ToString().Trim() + "'");
             if(rows.Length!=)
             {
                 foreach (DataRow row in rows)
                 {
                     parentNode += AppendJson(row, dtAll);
                 }
             }
             return parentNode;
         }
 注意：①.要后台数据进行eval（object化）--eval
 eval前：[{id:'y1',pId:'',name:'y1',drag:true},{id:'y11',pId:'y1',name:'y11',drag:true},{id:'y2',pId:'',name:'y2',drag:true}]
 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]