C# Windows Phone silverlight 8.1 HttpNotificationChannel频道更新未命中

我有一个非常基本的Windows Phone Silverlight 8.1应用程序，其中包含以下内容（在将其添加到一个更大的现有应用程序之前，我想证明这个概念）：

HttpNotificationChannel推送通道；
无效注册表PushChannel（）
{
pushChannel=HttpNotificationChannel.Find（channelName）；
//如果未找到通道，则创建到推送服务的新连接。
if（pushChannel==null）
{
pushChannel=新的HttpNotificationChannel（通道名称）；
//在尝试打开通道之前注册所有事件。
pushChannel.ChannelUriUpdated+=新事件处理程序（pushChannel\u ChannelUriUpdated）；
pushChannel.ErrorOccursed+=新的事件处理程序（pushChannel\u ErrorOccursed）；
pushChannel.HttpNotificationReceived+=新事件处理程序（pushChannel\u HttpNotificationReceived）；
pushChannel.Open（）；
}
其他的
{
//频道已经打开，所以只需注册所有事件。
pushChannel.ChannelUriUpdated+=新事件处理程序（pushChannel\u ChannelUriUpdated）；
pushChannel.ErrorOccursed+=新的事件处理程序（pushChannel\u ErrorOccursed）；
pushChannel.HttpNotificationReceived+=新事件处理程序（pushChannel\u HttpNotificationReceived）；
//将新通道URI传递回web服务的代码
}
}
void PushChannel\u ChannelUriUpdated（对象发送方，NotificationChannelUriEventArgs e）
{
Dispatcher.BeginInvoke（（）=>
{
//出于测试目的显示新的URI。通常，URI会在此时传递回web服务。
System.Diagnostics.Debug.WriteLine（例如ChannelUri.ToString（））；
Show（String.Format（“通道Uri为{0}”），
e、 ChannelUri.ToString（））；
});
}

问题是PushChannel\u ChannelUriUpdated从未被击中，我就是不明白为什么

我在WMAppManifest.xml中设置了ID\u CAP\u PUSH\u通知，并且

---

Toast Capable=在我的包中是。appmanifest…我遗漏了什么运动鞋？

我尝试了以下通知代码：

HttpNotificationChannel pushChannel;

将pushChannel作为globle放入App.xaml.cs文件中，它在

EventHandler

string channelName = "PushChannel";
pushChannel = HttpNotificationChannel.Find(channelName);
//Push Notifications
if (pushChannel == null)
{
    pushChannel = new HttpNotificationChannel(channelName);

    //// Register for all the events before attempting to open the channel.
    pushChannel.ChannelUriUpdated += new EventHandler<NotificationChannelUriEventArgs>(PushChannel_ChannelUriUpdated);
    pushChannel.ErrorOccurred += new EventHandler<NotificationChannelErrorEventArgs>(PushChannel_ErrorOccurred);

    // Register for this notification only if you need to receive the notifications while your application is running.
    pushChannel.ShellToastNotificationReceived += new EventHandler<NotificationEventArgs>(PushChannel_ShellToastNotificationReceived);

    pushChannel.Open();

    // Bind this new channel for toast events.
    pushChannel.BindToShellToast();
}
else
{
    // The channel was already open, so just register for all the events.
    pushChannel.ChannelUriUpdated += new EventHandler<NotificationChannelUriEventArgs>(PushChannel_ChannelUriUpdated);
    pushChannel.ErrorOccurred += new EventHandler<NotificationChannelErrorEventArgs>(PushChannel_ErrorOccurred);

    // Register for this notification only if you need to receive the notifications while your application is running.
    pushChannel.ShellToastNotificationReceived += new EventHandler<NotificationEventArgs>(PushChannel_ShellToastNotificationReceived);

    // Display the URI for testing purposes. Normally, the URI would be passed back to your web service at this point.enter code here
    Deployment.Current.Dispatcher.BeginInvoke(() =>
    {
        //pushURI = pushChannel.ChannelUri.ToString();
        //MessageBox.Show(String.Format("Channel Uri is {0}", pushChannel.ChannelUri.ToString()));
        Notification.ChannelURI = pushChannel.ChannelUri.ToString();
    });
}

---

问题出在哪里？pushChannel.Uri在pushChannel.Open（）之后总是空的；连接状态断开。然后调用NotificationHub=newNotificationHub（hubName，connectionString）；wait hub.RegisterNativeAsync（pushChannel.ChannelUri.ToString（））；它在RegisterNativeAsynchronous上抛出了一个NullReferenceException。你能试试我发布的答案吗？谢谢你-我应该更精确一些…在pushChannel.Open（）之后；pushChannel Uri为空，connectionstatus已断开连接。@BzBurr我在

pushChannel\u ChannelUriUpdated

事件中获得了ChannelUriChannelUri@BzBurr请检查您的电话号码configuration@BzBurr

PushChannel\u ChannelUriUpdated

不是每次都调用，当未找到

HttpNotificationChannel

或

null

ID\u CAP\u PUSH\u通知打开、ID\u CAP\u网络打开、应用程序支持Toast时，会调用它……我可能缺少什么？

string channelName = "PushChannel";
pushChannel = HttpNotificationChannel.Find(channelName);
//Push Notifications
if (pushChannel == null)
{
    pushChannel = new HttpNotificationChannel(channelName);

    //// Register for all the events before attempting to open the channel.
    pushChannel.ChannelUriUpdated += new EventHandler<NotificationChannelUriEventArgs>(PushChannel_ChannelUriUpdated);
    pushChannel.ErrorOccurred += new EventHandler<NotificationChannelErrorEventArgs>(PushChannel_ErrorOccurred);

    // Register for this notification only if you need to receive the notifications while your application is running.
    pushChannel.ShellToastNotificationReceived += new EventHandler<NotificationEventArgs>(PushChannel_ShellToastNotificationReceived);

    pushChannel.Open();

    // Bind this new channel for toast events.
    pushChannel.BindToShellToast();
}
else
{
    // The channel was already open, so just register for all the events.
    pushChannel.ChannelUriUpdated += new EventHandler<NotificationChannelUriEventArgs>(PushChannel_ChannelUriUpdated);
    pushChannel.ErrorOccurred += new EventHandler<NotificationChannelErrorEventArgs>(PushChannel_ErrorOccurred);

    // Register for this notification only if you need to receive the notifications while your application is running.
    pushChannel.ShellToastNotificationReceived += new EventHandler<NotificationEventArgs>(PushChannel_ShellToastNotificationReceived);

    // Display the URI for testing purposes. Normally, the URI would be passed back to your web service at this point.enter code here
    Deployment.Current.Dispatcher.BeginInvoke(() =>
    {
        //pushURI = pushChannel.ChannelUri.ToString();
        //MessageBox.Show(String.Format("Channel Uri is {0}", pushChannel.ChannelUri.ToString()));
        Notification.ChannelURI = pushChannel.ChannelUri.ToString();
    });
}

void PushChannel_ChannelUriUpdated(object sender, NotificationChannelUriEventArgs e1)
{
    try
    {
        Deployment.Current.Dispatcher.BeginInvoke(() =>
        {
            MessageBox.Show(String.Format("Channel Uri is {0}", e1.ChannelUri.ToString()));
        });
    }
    catch (Exception ex)
    { }
}
void PushChannel_ErrorOccurred(object sender, NotificationChannelErrorEventArgs e2)
{
    try
    {
        // Error handling logic for your particular application would be here.
        Deployment.Current.Dispatcher.BeginInvoke(() =>
        {
            //MessageBox.Show(String.Format("A push notification {0} error occurred.  {1} ({2}) {3}", e2.ErrorType, e2.Message, e2.ErrorCode, e2.ErrorAdditionalData));
        });
    }
    catch (Exception ex)
    { }
}