How to: Share Calendar Information Through E-Mail

This example shows how to share information from a calendar by e-mail in the iCalendar format.

The iCalendar format allows you to send items to other Outlook or non-Outlook clients via standard Internet mail formats and protocols. The code sample uses the CalendarSharing object that supports exporting information from a calendar folder to the iCalendar format.

The code sample first calls GetCalendarExporter on the default Calendar folder to obtain a CalendarSharing object. Then it sets properties of the CalendarSharing object to specify criteria for the export, such as the date range of calendar information, whether to include attachments, and details of appointments that are marked "private."

To send the calendar information by e-mail, the code sample calls the ForwardAsICal method of the CalendarSharing object.

If you use Visual Studio to test this code example, you must first add a reference to the Microsoft Outlook 15.0 Object Library component and specify the Outlook variable when you import the Microsoft.Office.Interop.Outlook namespace. The Imports or using statement must not occur directly before the functions in the code example but must be added before the public Class declaration. The following lines of code show how to do the import and assignment in Visual Basic and C#.

using Outlook = Microsoft.Office.Interop.Outlook;
private void SendNextWeekToAddress(string sendToAddresses)
    if (string.IsNullOrEmpty(sendToAddresses))
        throw new ArgumentException(
        "sendToAddress","Parameter must contain a value.");
    Outlook.Folder calendar = 
        as Outlook.Folder;
    Outlook.CalendarSharing exporter = calendar.GetCalendarExporter();

    // Set the properties for the export
    exporter.CalendarDetail = Outlook.OlCalendarDetail.olFullDetails;
    exporter.IncludeAttachments = true;
    exporter.IncludePrivateDetails = false;
    exporter.RestrictToWorkingHours = false;
    exporter.StartDate = DateTime.Today.Date;
    exporter.EndDate = DateTime.Today.Date.AddDays(7);

    // Create a new mail item
    Outlook.MailItem calendarMail = 
    calendarMail.To = sendToAddresses;

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