public string GetSeatLayoutListJson() { List <SeatLayout> list = new List <SeatLayout>(); ISeatManageService seatManage = new WcfServiceForSeatManage.SeatManageDateService(); List <ReadingRoomInfo> rooms = seatManage.GetReadingRoomInfo(null); foreach (var item in rooms) { SeatLayout layOut = seatManage.GetRoomSeatLayOut(item.No); list.Add(layOut); } string s = Newtonsoft.Json.JsonConvert.SerializeObject(list); return(s); }