Question

我有一个应用程序，可以在Exchange Online for Office 365的日历中创建约会。我正在使用EWS托管API。

public void CreateAppoitment(string principalName, int taskId) {
  ExchangeService service = createService(principalName);

  ItemView itemView = new ItemView(1000);
  itemView.PropertySet = new PropertySet(BasePropertySet.IdOnly);

  List<Appointment> toCreate = new List<Appointment>();

  // Create the appointment.
  Appointment appointment = new Appointment(service);

  // Set properties on the appointment.
  appointment.Subject = "Test Appointment";
  appointment.Body = "The appointment ...";
  appointment.Start = new DateTime(2014, 6, 18, 9, 0, 0);
  appointment.End = appointment.Start.AddDays(2);

  ExtendedPropertyDefinition epdTaskId = new ExtendedPropertyDefinition(DefaultExtendedPropertySet.Appointment, "TASK_Id", MapiPropertyType.Integer);
  appointment.SetExtendedProperty(epdTaskId, taskId);
  appointment.IsResponseRequested = false;
  toCreate.Add(appointment);
  ServiceResponseCollection<ServiceResponse> createResponse = service.CreateItems(toCreate, WellKnownFolderName.Calendar, MessageDisposition.SaveOnly, SendInvitationsMode.SendToNone);
}

注意我正在设置ExtendedPropertyDefinition“TASK_Id”

我正在使用模拟在用户的日历中创建约会：

private ExchangeService createService(string principalName) {
  ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2013);
  service.Url = new Uri("https://outlook.office365.com/EWS/Exchange.asmx");
  service.UseDefaultCredentials = false;
  service.Credentials = new WebCredentials("XXXX", "YYYY");
  service.ImpersonatedUserId = new ImpersonatedUserId(ConnectingIdType.PrincipalName, principalName);

  return service;
}

然后，给定一个taskId，我想用这个taskId删除所有约会：

public void DeleteAppointment(string principalName, int appointmentId) {
  ExchangeService service = createService(principalName);
  ItemView itemView = new ItemView(1000);
  itemView.PropertySet = new PropertySet(BasePropertySet.IdOnly);

  ExtendedPropertyDefinition epdTaskId = new ExtendedPropertyDefinition(
    DefaultExtendedPropertySet.Appointment, "TASK_Id", MapiPropertyType.Integer);

  SearchFilter filterOnTaskId = new SearchFilter.IsEqualTo(epdTaskId, appointmentId);
  FindItemsResults<Item> appointments = service.FindItems(WellKnownFolderName.Calendar, filterOnTaskId, itemView);
  List<ItemId> toDelete = appointments.Select(item => item.Id).ToList();
  if (toDelete.Count > 0) {
    ServiceResponseCollection<ServiceResponse> response = service.DeleteItems(
      toDelete, DeleteMode.MoveToDeletedItems, SendCancellationsMode.SendToNone,
      AffectedTaskOccurrence.SpecifiedOccurrenceOnly);

    foreach (ServiceResponse del in response) {
      if (del.Result == ServiceResult.Error) {
        //...
      }
    }
  }
}

但这样service.FindItems（）只返回principalName与TASK_Id = taskId的约会，我想要约会所有用户。有办法吗？

Answer 1

Exchange托管API和Exchange Web服务一次只能访问一个用户的日历 - 直接使用用户凭据或通过模拟间接授予服务帐户访问用户日历的权限。

要一次搜索多个日历，需要使用其他技术。想到的一个选项是在Exchange 2013中使用eDiscovery操作。虽然它们通常用于查找出于法律原因的电子邮件，但您可以使用相同的过程。遗憾的是，eDiscovery的文档现在非常稀疏，但您可以在此处查看可用的EWS操作：eDiscovery in EWS in Exchange，您可以在ExchangeService对象上找到相应的EWS托管API方法。 / p>

使用EWS托管API从所有用户删除日历约会

1 个答案: