c# – 我的流媒体订阅在哪里？

下面是我用来初始化订阅和我使用的事件的代码.

public void Subscribe()
{
    var locateMailbox = new Mailbox
                            {
                                Address = "myemail"
                            };
    var folderId = new FolderId(WellKnownFolderName.Inbox,locateMailbox);
    var foldersToWatch = new[] {folderId};
    StreamingSubscription streamingSubscription =
        _exchangeService.SubscribeToStreamingNotifications(foldersToWatch,EventType.NewMail);
    // Timeout is set at 1 minute intentionally
    var streamingConnection = new StreamingSubscriptionConnection(_exchangeService,1);

    streamingConnection.AddSubscription(streamingSubscription);

    streamingConnection.OnSubscriptionError += ResolveError;
    streamingConnection.OnDisconnect += Reconnect;

    streamingConnection.Open();
}

public void Reconnect(object sender,SubscriptionErrorEventArgs disconnectEventArgs)
{
    if (!((StreamingSubscriptionConnection)sender).IsOpen)
        ((StreamingSubscriptionConnection)sender).Open();
}

public void ResolveError(object sender,SubscriptionErrorEventArgs errorEventArgs)
{
    var streamingSubscriptionConnection =
        (StreamingSubscriptionConnection) sender;
    if (!streamingSubscriptionConnection.IsOpen)
        streamingSubscriptionConnection.Open();
}

ServiceLocalException – 必须先为此连接添加至少一个订阅,然后才能打开它.

这个例外不言而喻,我知道我可以简单地在Reconnect()中创建另一个订阅.我希望有人能帮我理解订阅的去向.我无法想象像Exchange 2010这样的产品会丢失我的订阅.另外,我无法指出错误.有时候我可以让我的订阅保持活动状态10分钟,有时我会收到一条关于我的订阅在2-3分钟后无效的错误.

我使用Exchange 2010 SP1是值得的.