【WPF】使用控件MediaElement播放视频

需求是点击按钮后，弹出弹窗播放视频。按钮的点击事件如下。

public void ShowVideo()
{
    Window window = new Window();
    window.Width = ;
    window.Height = ;

    // 控制弹出位置在屏幕正中
    double screenHeight = SystemParameters.FullPrimaryScreenHeight;
    double screenWidth = SystemParameters.FullPrimaryScreenWidth;
    window.Top = (screenHeight - window.Height) / ;
    window.Left = (screenWidth - window.Width) / ;

    MediaElement player = new MediaElement();
    //player.Margin = new Thickness(1, 1, 1, 1);
    player.Width = ;
    player.Height = ;

　　// 视频资源放在Debug\bin目录下
    var mp4_path = AppDomain.CurrentDomain.BaseDirectory + @"\video.mp4";
    player.Source = new Uri(mp4_path, UriKind.RelativeOrAbsolute);
    player.LoadedBehavior = MediaState.Manual;
    player.Stop();
    player.Play();

    // 视频播放控件加入到窗体中
    window.Content = player;
    window.ShowDialog();
}

运行效果如下：