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]
