EWS:Appoitnment Item.Id.UniqueId 不是常数

问题描述

在使用 EWS Managed API 2.0 和 Exchange Server 2007 SP3 时，我遇到了一个奇怪的问题.

There is a weird problem I'm facing when working with EWS Managed API 2.0 with Exchange Server 2007 SP3.

当我创建一个约会并保存它时，我使用以下代码获取它的 ID:

When I create an appointment and I save it, I get its ID using the following code :

appointment.Save(SendInvitationsMode.SendToAllAndSaveCopy);

appointment.Id.UniqueId;

我将它存储在我的本地数据库中，以便我以后可以使用它来更新会议或取消会议.

and I store it in my local DB so I can later use it to update the meeting or cancel it.

稍后当我想检索冲突的会议时，我使用以下代码:

Later when I want to retrieve the conflicting meetings I use the following code :

CalendarView view = new CalendarView(Start, End);
view.PropertySet = new PropertySet();
Folder rootfolder = Folder.Bind(service, WellKnownFolderName.Calendar);
//view.PropertySet.Add(AppointmentSchema.Resources);
view.PropertySet.Add(ItemSchema.Id);
view.PropertySet.Add(AppointmentSchema.Subject);
view.PropertySet.Add(AppointmentSchema.Start);
view.PropertySet.Add(AppointmentSchema.Duration);
view.PropertySet.Add(AppointmentSchema.End);
view.PropertySet.Add(AppointmentSchema.Organizer);
view.PropertySet.Add(AppointmentSchema.Id);
Mailbox mailbox = new Mailbox(Email);
FolderId id = new FolderId(WellKnownFolderName.Calendar, mailbox);
CalendarFolder folder = CalendarFolder.Bind(service, id);
FindItemsResults<Appointment> findResults = folder.FindAppointments(view);

//Iterating through the conflicting meetings returned by folder.FindAppointments
foreach (Appointment app in findResults.Items)
  {
     appts.Rows.Add(app.Subject, app.Start, app.End, app.Duration, app.Id.UniqueId);
  }

当我想访问其中一个冲突会议的 ID 时，我发现它与我在本地数据库中拥有的 ID 不同，尽管所有其他信息都相同.我仍然可以使用我的 ID 绑定到约会，但问题是同一个会议现在有 2 个不同的 ID.为什么 EWS 不为约会存储唯一 ID 为什么和 (appointment.Id.UniqueId) 不是恒定的?

and when I want to access the ID of one of the conflicting meetings I find it different than the ID I have it in my local DB although all other information are the same. I still can use my ID to bind to the appointment, but the problem is that the same meeting now have 2 different IDs. Why EWS isn't storing a unique ID for appointments why and (appointment.Id.UniqueId)is not constant ?

我没有找到解决这个问题的明确方法.

I didn't find a clear solution for this problem.

推荐答案

Appointment 本身没有不改变的唯一 id，但约会有属性 IcalUid(我认为它的唯一日历项 id):

Appointment itself doesn't have unique id which doesnt change, but appointment has property ICalUid (i think its Unique calendar item id):

appointment.ICalUid;

这真的是独一无二的，并且不会改变，然后就我测试而言，会议会更新..我为一个人生成了 1000 次会议，并且所有 ICalUid 都是独一无二的.试试吧，它对我有帮助:)

which is really unique and doesn't change then meeting is updated as far as i tested.. i generated 1000 meetings for one person and all ICalUid's were unique. Try it, it helped for me :)

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