public void GetDevices() { if (Context.Session["OpenId"] != null) { string OpenId = Context.Session["OpenId"].ToString();//"o_w1Kw8Uxh4dEoRDCe-HNYnyYlhY"; List <Dictionary <string, string> > list = QrChildManager.GetDevices(OpenId); if (list == null) { Write("null"); return; } Write(JsonConvert.SerializeObject(list)); } }