public void BindTree() { BaseHandler bh = new BaseHandler(); var tree = bh.GetCoursePluggsAsTree(CourseId, Language); if (tree.Count() == 0) { if (Page.Request.QueryString["edit"] == "add") { btnAddAfter.Visible = false; btnAddBefore.Visible = false; btnAddChild.Visible = false; btnAdd.Visible = true; } else { lblNoCP.Visible = true; btnRemovePluggs.Enabled = false; btnReorder.Enabled = false; } } //JavaScriptSerializer TheSerializer = new JavaScriptSerializer(); //hdnTreeData.Value = TheSerializer.Serialize(tree); hdnTreeData.Value = Newtonsoft.Json.JsonConvert.SerializeObject(tree); }