问题
I need to set a UserProperty on a master of a recurring Appointment, from an appointment instance.
The scenario is:
a. user opens an instance of a recurring meeting/appointment.
b. my program sets a UserProperty on the master of the appointment series
Getting the master appointment is easy with the Parent property, however it is read-only.
How can I get a modify-able reference to the master appointment?
The code I want to execute is along these lines
Outlook.AppointmentItem masterAppointment = (Outlook.AppointmentItem)(currentAppointment.Parent);
masterAppointment.ItemProperties.Add("xxx", Outlook.OlUserPropertyType.olText);
masterAppointment.ItemProperties["xxx"].Value = aStringValue;
masterAppointment.Save();
回答1:
What makes you think that AppointmentItem.Parent returns a read-only AppointmentItem?
Do you get an error when you call Save?
If you need to add a custom property, use AppointmentItem.UserProperties.Add.
来源：https://stackoverflow.com/questions/14788295/how-to-modify-the-appointmentitem-parent-object