C＃Outlook VSTO如何将日历导出到ics或vcs文件？

Question

大家好

这里有任何教程如何将范围从1 Yeahr的日历导出为vcs和ics文件？

我已经尝试过的

OutlookNS = outlook.GetNamespace("MAPI");

Outlook.MAPIFolder f = OutlookNS.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderCalendar);

Outlook.CalendarSharing cs = f.GetCalendarExporter();
cs.CalendarDetail = Outlook.OlCalendarDetail.olFullDetails;
cs.StartDate = new DateTime(2015, 11, 1);
cs.EndDate = new DateTime(2016, 12, 31);
cs.SaveAsICal(Environment.GetFolderPath(Environment.SpecialFolder.Desktop) + "\\calender.ics");

我得到的错误：

The object reference was not set to an object instance

那我该怎么办请帮帮我:)

Answer 1

起作用的代码：

        OutlookNS = Globals.ThisAddIn.Application.GetNamespace("MAPI");
        Outlook.MAPIFolder f = OutlookNS.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderCalendar);
        Outlook.CalendarSharing cs = f.GetCalendarExporter();
        cs.CalendarDetail = Outlook.OlCalendarDetail.olFullDetails;
        cs.StartDate = new DateTime(2015, 11, 1);
        cs.EndDate = new DateTime(2016, 12, 31);
        cs.SaveAsICal(Environment.GetFolderPath(Environment.SpecialFolder.Desktop) + "\\kalender.ics");