接收推送通知时从App.xaml.cs导航

Question

您好，我希望我的应用程序导航到一个页面，当我收到推吐司通知。我的代码如下：

ParsePush.ToastNotificationReceived += OnPushNotification;

这是为了处理推流事件

private async void OnPushNotification(object sender, Windows.Networking.PushNotifications.PushNotificationReceivedEventArgs e)
    {
        var AdFrame = Window.Current.Content as Frame;
            var localSettings = Windows.Storage.ApplicationData.Current.LocalSettings;
            if (localSettings.Values.ContainsKey("Suspended"))
            {
                String value = localSettings.Values["Suspended"].ToString();
                if (value != null)
                {
                    if (value == "false")
                    {
                        AdFrame.Navigate(typeof(Ad));
                    }
                }
            }
        }

我在var AdFrame = Window.Current.Content as Frame;收到一个空引用错误

我在App.xaml.cs .I中添加了这段代码，只是想从当前页面导航到广告页面，无论哪个页面可能处于活动状态。我是windows的新手，任何帮助都将不胜感激。

Answer 1

您需要显示toast通知，而不是：

XmlDocument toastXml = ToastNotificationManager.GetTemplateContent(
    ToastTemplateType.ToastImageAndText02);

XmlNodeList stringElements = toastXml.GetElementsByTagName("text");
stringElements.Item(0).AppendChild(toastXml.CreateTextNode("Hello world!"));

IXmlNode toastNode = toastXml.SelectSingleNode("/toast");

XmlAttribute launchAttribute = toastXml.CreateAttribute("launch");
launchAttribute.Value = "pass data here"; // TODO: pass data here
toastNode.Attributes.SetNamedItem(launchAttribute);

ToastNotification toast = new ToastNotification(toastXml);
ToastNotificationManager.CreateToastNotifier().Show(toast);

当用户点击吐司通知，你就可以处理发布会应用，然后读取数据。

protected override void OnLaunched(LaunchActivatedEventArgs e)
{
    // ...

    MainPage page = rootFrame.Content as MainPage;
    page.ParseData(e.Arguments);
}