通知 – windows 8 metro app – toast notification

(没有错误,它构建成功但只是不起作用.)

我想要做的很简单：

有一个按钮.
当button_click事件发生时,我想弹出一个Toast通知.

这就是我做的：

namespace Application1
{
    public sealed partial class BlankPage : Page
    {
        public BlankPage()
        {
            this.InitializeComponent();
            Scenario2Init();
        }

        void Scenario2Init()
        {
            toastTest.Click += (sender,e) => { ToastAlarm(true); };
        }

        void ToastAlarm(bool loopAudio)
        {
            XmlDocument toastXml = ToastNotificationManager.GetTemplateContent(ToastTemplateType.ToastText02);
            // Toasts can optionally be set to long duration by adding the 'duration' attribute
            IXmlNode toastNode = toastXml.SelectSingleNode("/toast");
            ((XmlElement)toastNode).SetAttribute("duration","long");

            // This XmlNodeList will have two items since the template we are using has two text fields.
            XmlNodeList stringElements = toastXml.GetElementsByTagName("text");
            stringElements.Item(0).AppendChild(toastXml.CreateTextNode("Long Duration Toast"));

            XmlElement audioElement = toastXml.CreateElement("audio");

            if (loopAudio)
            {
                // Long-duration Toasts can optionally loop audio using the 'loop' attribute
                audioElement.SetAttribute("src","ms-winsoundevent:Notification.Looping.Alarm");
                audioElement.SetAttribute("loop","true");
                stringElements.Item(1).AppendChild(toastXml.CreateTextNode("Looping audio"));
            }
            else
            {
                audioElement.SetAttribute("src","ms-winsoundevent:Notification.IM");
            }

            toastNode.AppendChild(audioElement);

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

            //Scenario2OutputText.Text = toastXml.GetXml();
        }

    }
}

如果我单击按钮,则没有任何反应.为什么？