Question

我在Windows Phone应用中为背景音乐创建了 MediaElement ，它可以完美播放现在当我尝试为按钮添加声音时出现问题按下

当我调试时，背景音乐播放，但当我按按钮时，导航我到下一页没有播放我创建的声音，当我从导航页面按 BackButton 时，播放它，为什么？

代码：

private void play_Click(object sender, RoutedEventArgs e)
{
    MediaElement Click = new MediaElement();
    Click.Source = new Uri ("/Assets/Sounds/press.mp3",UriKind.Relative);
    Click.Position = TimeSpan.Zero;
    Click.Volume = 1;
    LayoutRoot.Children.Add(Click);
    Click.Play();
    NavigationService.Navigate(new Uri("/NavPage.xaml", UriKind.Relative));
}

Answer 1

private void play_Click(object sender, RoutedEventArgs e)
        {
            MediaElement Click = new MediaElement();
            Click.Source = new Uri ("/Assets/Sounds/press.mp3",UriKind.Relative);
            Click.Position = TimeSpan.Zero;
            Click.Volume = 1;
            LayoutRoot.Children.Add(Click);
            Click.Play();

        }

你应该处理这个外部按钮点击，

NavigationService.Navigate(new Uri("/NavPage.xaml", UriKind.Relative));

为点击添加事件处理程序并单独调用

 Click.MediaEnded += Click_Completed;

 void Click_Completed(object sender, RoutedEventArgs e)
        {
           NavigationService.Navigate(new Uri("/NavPage.xaml", UriKind.Relative));
        }

Answer 2

或者您可以制作mediaElement的MediaEnded事件，然后您可以调用导航

像这样：

private void play_Click(object sender, RoutedEventArgs e)
        {
            MediaElement Click = new MediaElement();
            Click.Source = new Uri ("/Assets/Sounds/press.mp3",UriKind.Relative);
            Click.Position = TimeSpan.Zero;
            Click.Volume = 1;
            LayoutRoot.Children.Add(Click);
            Click.MediaEnded += Click_MediaEnded;
            Click.Play();
        }

void Click_MediaEnded(object sender, RoutedEventArgs e)
       {
            NavigationService.Navigate(new Uri("/NavPage.xaml", UriKind.Relative));
       }

声音没有在合适的时刻播放

2 个答案: