jquery tree使用json数据格式的前后台交互，json能获得，可是前台不显示树？？在线等帮助。。
后台：public partial class AppmangeMent : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
GetJson();
}
}
public static bool IsHaveChild(int id)
{
bool flag = false;
string Hql = "from Frm_ModuleInfo where PARENTID=" + id + "";
Frm_ModuleBLL bll = new Frm_ModuleBLL();
IList<Frm_ModuleInfo> lst = bll.GetAllDemos(Hql);
if (lst.Count > 0)
{
flag = true;
}
return flag;
}
public static IList<Frm_ModuleInfo> GetChild(int id)
{
Frm_ModuleBLL bll = new Frm_ModuleBLL();
string Hql = "from Frm_ModuleInfo where PARENTID=" + id + "";
IList<Frm_ModuleInfo> lst = bll.GetAllDemos(Hql);
return lst;
}
[WebMethod]
public static string GetJson()
{
string json = "[";
IList<Frm_ModuleInfo> t = ReturnParentTree();
foreach (Frm_ModuleInfo model in t)
{
if (model != t[t.Count - 1])
{
json += GetJsonByModel(model) + ",";
}
else
{
json += GetJsonByModel(model);
}
}
json += "]";
json = json.Replace("'", "\"");
return json;
}
public static string GetJsonByModel(Frm_ModuleInfo t)
{
string json = "";
bool flag = IsHaveChild(t.MODULEID);
json = "{"
+ "'id':'" + t.MODULEID + "',"
+ "'text':'" + t.MODULENAME + "',"
+ "'value':'" + t.MODULEID + "',"
+ "'showcheck':true,"
+ "'checkstate':'0',"
+ "'hasChildren':" + flag.ToString().ToLower() + ","
+ "'isexpand':false,"
+ "'ChildNodes':";
if (!flag)
{
json += "null,";
json += "'complete':false}";
}
else
{
json += "[";
IList<Frm_ModuleInfo> list = GetChild(t.MODULEID);
foreach (Frm_ModuleInfo tree in list)
{
if (tree != list[list.Count - 1])
{
json += GetJsonByModel(tree) + ",";
}
else
{
json += GetJsonByModel(tree);
}
}
json += "],'complete':true}";
}
return json;
}
public static IList<Frm_ModuleInfo> ReturnParentTree()
{
Frm_ModuleBLL bll = new Frm_ModuleBLL();
string Hql = "from Frm_ModuleInfo where PARENTID=0 order by MODULECODE asc";
IList<Frm_ModuleInfo> lst = bll.GetAllDemos(Hql);
return lst;
}
}
前台： <script type="text/javascript">
$(document).ready(function () {
$.ajax({
type: "post",
contentType: "application/json;charset=utf-8",
dataType: "json",
url: "AppMangeMent.aspx/GetJson",
success: function (data) {
var o = { showcheck: true };
o.data = eval(data.d);
$("#showTree").treeview(o);
}
});
});</script>
[解决办法]
严格的json格式 用 双引号
比如
{"name": "Tom"}
[解决办法]
如果预期应该显示树的地方什么都没有，那有可能是js在执行过程中报错了。你打开firebug看看有没有js错误。
