Question

我正在编写一个依赖通知工作的Windows桌面应用。但是，当我收到通知时，通道上的事件处理程序代码PushNotificationReceived似乎没有实际触发。在将uri发送到我的服务器之前，调用以下代码来获取通道：

internal async Task<PushNotificationChannel> GetChannel()
    {
        PushNotificationChannel pnc;
        try
        {
            pnc = await PushNotificationChannelManager.CreatePushNotificationChannelForApplicationAsync();
            if (_channel == null || !pnc.Uri.Equals(_channel.Uri))
            {
                _channel = pnc;
                _channel.PushNotificationReceived += OnPushNotificationReceived;
                Debug.WriteLine(_channel.Uri);
            }
        }
        catch (Exception ex)
        {
            Debug.WriteLine(ex.Message);
            _channel = null;
        }
               dispatcher = Windows.UI.Core.CoreWindow.GetForCurrentThread().Dispatcher;
        return _channel;
    }

这样，无论何时创建或更新频道（通过不同的频道uri），它都应该将新频道的PushNotificationReceived事件分配给以下内容（基本上从msdn的示例中解除）：

void OnPushNotificationReceived(PushNotificationChannel sender, PushNotificationReceivedEventArgs e)
    {
        string typeString = String.Empty;
        string notificationContent = String.Empty;
        switch (e.NotificationType)
        {
            //
            //other notification types omitted for brevity
            //
            case PushNotificationType.Toast:
                notificationContent = e.ToastNotification.Content.GetXml();
                typeString = "Toast";
                // Setting the cancel property prevents the notification from being delivered. It's especially important to do this for toasts:
                // if your application is already on the screen, there's no need to display a toast from push notifications.
                e.Cancel = true;
                break;
        }

        Debug.WriteLine("Received notification, with payload: {0}", notificationContent);

        string text = "Received a " + typeString + " notification, containing: " + notificationContent;

        var ignored = dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
        {
            MainPage.Current.ClearBanner();
        });
    }

重要的是，“MainPage.Current”是对应用程序主页面的引用，作为静态变量。清晰的横幅线只是从主页面上删除了一个粉红色的横幅（只是想让一些简单的工作开始）。

但是，代码似乎永远不会触发（没有调试语句，粉红色横幅仍然存在）。我成功获得了Toast通知，点击它会将焦点设置到我的应用程序，所以它肯定不会出错。

我做错了什么或者某种方式调试通知本身？

WNS PushNotificationReceived不拦截toast推送通知

0 个答案: