02-desktop/DAL/IStation.DAL.Monitor/MonitorDataSet/MonitorMonthlyDataSet_Method.cs
@@ -128,7 +128,7 @@ /// </summary> private List<MonitorDataSetFolderInfo> GetMonitorDataSetFolderInfoList(long monitorDataSourcesId, int year, int month) { var dateFolderInfo = this.GetYearMonthFolder(monitorDataSourcesId, year, month); var dateFolderInfo = GetYearMonthFolder(monitorDataSourcesId, year, month); var directories = Directory.GetDirectories(dateFolderInfo); if (directories == null || directories.Count() < 1) return default;