如何识别相同的 Exchange 日历事件？

Question

我使用 EWS 获取有关用户日历事件的数据。我代表用户连接到 MS Exchange。如果我以用户 B 的身份连接，我如何判断我是否在用户 A 的邮箱中找到了我之前找到的相同日历事件？也许是相同的消息标识符或类似的东西？

Answer 1

有几种方法可以做到这一点，最好的方法（Outlook 使用的方法）是使用 Goid 属性，例如 GlobalCleanObjectId https://docs.microsoft.com/en-us/office/client-developer/outlook/mapi/pidlidcleanglobalobjectid-canonical-property 一个简单的例子

     Appointment newAppointment = new Appointment(service);
    newAppointment.Subject = "Test Subject";        
    newAppointment.Start = new DateTime(2012, 03, 27, 17, 00, 0);
    newAppointment.StartTimeZone = TimeZoneInfo.Local;
    newAppointment.EndTimeZone = TimeZoneInfo.Local;
    newAppointment.End = newAppointment.Start.AddMinutes(30);
    newAppointment.Save();
    newAppointment.Body = new MessageBody(Microsoft.Exchange.WebServices.Data.BodyType.Text, "test");
    newAppointment.RequiredAttendees.Add("attendee@domain.com");
    newAppointment.Update(ConflictResolutionMode.AlwaysOverwrite ,SendInvitationsOrCancellationsMode.SendOnlyToAll);
    ExtendedPropertyDefinition CleanGlobalObjectId = new ExtendedPropertyDefinition(DefaultExtendedPropertySet.Meeting, 0x23, MapiPropertyType.Binary);
    PropertySet psPropSet = new PropertySet(BasePropertySet.FirstClassProperties);
    psPropSet.Add(CleanGlobalObjectId);
    newAppointment.Load(psPropSet);
    object CalIdVal = null;
    newAppointment.TryGetProperty(CleanGlobalObjectId, out CalIdVal);
    Folder AtndCalendar = Folder.Bind(service, new FolderId(WellKnownFolderName.Calendar,"attendee@domain.com"));
    SearchFilter sfSearchFilter = new SearchFilter.IsEqualTo(CleanGlobalObjectId, Convert.ToBase64String((Byte[])CalIdVal));
    ItemView ivItemView = new ItemView(1);
    FindItemsResults<Item> fiResults = AtndCalendar.FindItems(sfSearchFilter, ivItemView);
    if (fiResults.Items.Count > 0) {
        //do whatever
    }

如何识别相同的 Exchange 日历事件？

How to identify the same Exchange calendar events?

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