Copy Calendar Items from Shared Calendar to Personal Calendar with Outlook API

Question

I am in the process of writing an app that will use the Outlook API to copy Calendar Items from a shared calendar to my personal calendar. Here is what I have so far...

using Outlook = Microsoft.Office.Interop.Outlook;

public Outlook.Items GetPublicEntries(string calendar)
    {
        Microsoft.Office.Interop.Outlook.Items CalendarFolderItems = null;
        Outlook.Application oApp;
        oApp = new Outlook.Application();
        Outlook.NameSpace oNS = oApp.GetNamespace("MAPI");
        //oNS.Logon(Missing.Value, Missing.Value, true, true);

        Outlook.Recipient oRecip = (Outlook.Recipient)oNS.CreateRecipient(calendar);
        Outlook.MAPIFolder usersCalendarFolder = (Outlook.MAPIFolder)oNS.GetSharedDefaultFolder(oRecip, Outlook.OlDefaultFolders.olFolderCalendar);
        CalendarFolderItems = usersCalendarFolder.Items;
        return CalendarFolderItems;
    }



    static void Main(string[] args)
    {
        String[] Cals = { "Appointments","Deadlines","Hearings"};

        foreach (string cal in Cals)
        {
            CalendarItems calobj = new CalendarItems();
            Outlook.Items calobjs = calobj.GetPublicEntries(cal);

            foreach (Microsoft.Office.Interop.Outlook.AppointmentItem item in calobjs)
            {
                try
                {
                    Console.WriteLine(item.Subject + " -> " + item.Start.ToLongDateString() + " - " + item.GlobalAppointmentID);
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
            Console.ReadKey();
        }
    }

I am able to return a list of items from the three calendars, but now I need to copy them to my personal calendar and that is where I am stuck. Anyone know how to go about doing this?

Thanks!

Tony

Answer 1

Outlook will not let you copy directly to a specified folder (unlike AppointmentItem.Move() which takes a MAPIFolder object as a parameter) - use AppointmentItem.Copy, followed by AppointmentItem.Move:

AppointmentItem copiedItem = Item.Copy();
AppointmentItem newItem = copiedItem.Move(YourDestinationFolder);
newItem.Save();

Beware that Outlook will wipe out the global appointment id when you call Copy() - this means message updates, even if they come directly to your Inbox, will not find the appointment.

You can avoid the intermediary step if you use Redemption (I am its author) - its RDOAppointmentItem (derived from the RDOMail object) lets you pass the target folder when calling CopyTo().