Question

我开发了Windows Phone 8应用程序，并在其中实现了推送通知服务。当我在Windows Phone模拟器中启动应用程序时，它会创建URI（从MPNS获取）并将其发送到数据库以便下次发送通知，但问题是，当我重新启动模拟器时，URI会发生变化，我想为设备或模拟器保留相同的URI，以便我该怎么做？

我生成URI的代码是

HttpNotificationChannel pushChannel;
        string channelName = "TileSampleChannel";
        InitializeComponent();
        pushChannel = HttpNotificationChannel.Find(channelName);
        if (pushChannel == null)
        {
            pushChannel = new HttpNotificationChannel(channelName);
            pushChannel.ChannelUriUpdated += new EventHandler<NotificationChannelUriEventArgs>(PushChannel_ChannelUriUpdated);
            pushChannel.ErrorOccurred += new EventHandler<NotificationChannelErrorEventArgs>(PushChannel_ErrorOccurred);
            pushChannel.Open();
            pushChannel.BindToShellTile();
        }
        else
        {
            pushChannel.ChannelUriUpdated += new EventHandler<NotificationChannelUriEventArgs>(PushChannel_ChannelUriUpdated);
            pushChannel.ErrorOccurred += new EventHandler<NotificationChannelErrorEventArgs>(PushChannel_ErrorOccurred);
            //System.Diagnostics.Debug.WriteLine(pushChannel.ChannelUri.ToString());
           // MessageBox.Show(String.Format("Channel Uri is {0}", pushChannel.ChannelUri.ToString()));
            string strURI = pushChannel.ChannelUri.ToString();
            (App.Current as App).phoneURI = strURI;
        }

我选择（App.Current as App）.phoneURI 并发送到数据库，但是当我重新启动模拟器时它会发生变化？

有时它会提供URI，有时它会抛出异常 TileNotificationClient.DLL中出现'System.NullReferenceException'类型的异常但在此行string strURI = pushChannel.ChannelUri.ToString();上未在用户代码中处理

Answer 1

模拟器的（imho）好的一面是，每次重新启动它时都会有一个干净整洁的系统。

Notifikation uri也不保证在真实设备上保持一致。您应该在应用程序设计中包含更改通道Uris。

推送Windows Phone 8的通知以获取URI

1 个答案: