【WPF】使用控件MediaElement播放視頻

需求是點擊按鈕后，彈出彈窗播放視頻。按鈕的點擊事件如下。

public void ShowVideo()
{
    Window window = new Window();
    window.Width = 800;
    window.Height = 600;
    
    // 控制彈出位置在屏幕正中
    double screenHeight = SystemParameters.FullPrimaryScreenHeight;
    double screenWidth = SystemParameters.FullPrimaryScreenWidth;
    window.Top = (screenHeight - window.Height) / 2;
    window.Left = (screenWidth - window.Width) / 2;

    MediaElement player = new MediaElement();
    //player.Margin = new Thickness(1, 1, 1, 1);
    player.Width = 800;
    player.Height = 600;

　　// 視頻資源放在Debug\bin目錄下
    var mp4_path = AppDomain.CurrentDomain.BaseDirectory + @"\video.mp4";
    player.Source = new Uri(mp4_path, UriKind.RelativeOrAbsolute);
    player.LoadedBehavior = MediaState.Manual;
    player.Stop();
    player.Play();

    // 視頻播放控件加入到窗體中
    window.Content = player;
    window.ShowDialog();
}

運行效果如下：