public String OsztalyLista() { OsztalyListaResponse resp = new OsztalyListaResponse(); try { resp.OsztalyLista = dbmngr.OsztalyListaKikero(); resp.ErrorCode = 0; } catch (Exception e) { resp.ErrorCode = -1; resp.ErrorMessage = e.Message; } return(JsonConvert.SerializeObject(resp)); }