zTree的后台数据绑定

 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 = "[" + 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）--eval
52 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]