吐司通知和Geofence Windows Phone 8.1

Question

我的Windows Phone8.1应用程序遇到了一个奇怪的问题。当用户使用Geofence QuickStart：Setting a Geofence和BackgroundTask QuickStart：Listing for Geofence events in The BackgroundTask QuickStart：Listing for Geofence in The BackgroundTask

这是后台任务（示例）

public void Run(IBackgroundTaskInstance taskInstance)
{
    // Get the information of the geofence(s) that have been hit
    var reports = GeofenceMonitor.Current.ReadReports();
    var report = reports.FirstOrDefault(r => (r.Geofence.Id == "id") && (r.NewState == GeofenceState.Entered));

    if (report == null) return;

    // Create a toast notification to show a geofence has been hit
    var toastXmlContent = ToastNotificationManager.GetTemplateContent(ToastTemplateType.ToastText02);

    var txtNodes = toastXmlContent.GetElementsByTagName("text");
    txtNodes[0].AppendChild(toastXmlContent.CreateTextNode("Geofence triggered toast!"));
    txtNodes[1].AppendChild(toastXmlContent.CreateTextNode(report.Geofence.Id));

    var toast = new ToastNotification(toastXmlContent);
    var toastNotifier = ToastNotificationManager.CreateToastNotifier();
    toastNotifier.Show(toast);

}

Answer 1

应用程序可能会在后台抛出异常，但由于这是在后台，您无法看到它。我找到的解决这类问题的唯一方法是在应用程序中添加日志功能，这样您就可以看到异常