EWS API 多个流媒体订阅混淆

Question

我已经“设法”通过 OnNotificationEvent 委托订阅了多个日历的更改事件，但我不知道如何确定哪个帐户发送了该事件。 OnNotificationEvent => sender returns 最后一个模拟 ID，如果我想读取 args->item.unqueid 的内容，我需要知道谁（哪个 smtp 帐户）读取它。

static void Main(string[] args)
        {
            var service = EWService();

            service.ImpersonatedUserId = new ImpersonatedUserId(ConnectingIdType.SmtpAddress, "user1@mydomain.com");

            var StreamingSubscription = service.SubscribeToStreamingNotifications(
                new FolderId[] { WellKnownFolderName.Calendar },                
                EventType.FreeBusyChanged);
            
            StreamingSubscriptionConnection connection = new StreamingSubscriptionConnection(service, 30);
            connection.AddSubscription(StreamingSubscription);
            connection.OnNotificationEvent += OnNotificationEvent;
            connection.OnDisconnect += OnDisconnect;
            connection.OnSubscriptionError += OnSubscriptionError;            
            connection.Open();


            service.ImpersonatedUserId = new ImpersonatedUserId(ConnectingIdType.SmtpAddress, "user2@mydomain.com");

            var StreamingSubscription2 = service.SubscribeToStreamingNotifications(
                new FolderId[] { WellKnownFolderName.Calendar },  
                EventType.FreeBusyChanged);

            StreamingSubscriptionConnection connection2 = new StreamingSubscriptionConnection(service, 30);
            connection2.AddSubscription(StreamingSubscription2);
            connection2.OnNotificationEvent += OnNotificationEvent;
            connection2.OnDisconnect += OnDisconnect;
            connection2.OnSubscriptionError += OnSubscriptionError;
            connection2.Open();

            Console.WriteLine("Waiting...");

            while (isRunning ==true)
            {

            }

            StreamingSubscription.Unsubscribe();
            connection.Close();

            StreamingSubscription2.Unsubscribe();
            connection2.Close();

        }

private static void OnNotificationEvent(object sender, NotificationEventArgs args)
{
    foreach (var item in ((StreamingSubscriptionConnection)sender).CurrentSubscriptions)
    {
        var id = item.Service.ImpersonatedUserId.Id;
        Console.WriteLine($"Event for: {id} ");
    }           

    foreach (var item in args.Events)
    {
        Console.WriteLine(item.EventType);
        if (item.EventType == EventType.FreeBusyChanged)
        {
            Console.WriteLine(((ItemEvent)item).ItemId);
        }
    }
}

Answer 1

通常，最好的方法是在创建订阅时跟踪 SubscriptionId，该 SubscriptionId 将返回到您创建它所针对的邮箱。 Exchange only returns SubscriptionId 是 Streaming 请求。另一种解决方法是使用已更改的项目（或文件夹）的 ParentFolderId，然后获取 StoreId，然后您可以从中解码 LegacyExchangeDn 并将其解析为邮箱的 SMTP 地址。但这需要多个 Web 请求，因此您最好在创建订阅时就这样做。

EWS API 多个流媒体订阅混淆

EWS API multiple streaming subscriptions confusion

c#

api

exchangewebservices

impersonation