public string GetGasStationList(string stGasStoreID) { GasStationDAL dalGasStation = new GasStationDAL(); DataTransfer response = new DataTransfer(); DataSet ds = dalGasStation.GetGasStationList(stGasStoreID); if (ds != null) { response.ResponseDataSet = ds; response.ResponseCode = DataTransfer.RESPONSE_CODE_SUCCESS; } else { response.ResponseCode = DataTransfer.RESPONSE_CODE_FAIL; } return JSonHelper.ConvertObjectToJSon(response); }