关闭窗口后 MediaTimeline 继续播放答案

【问题标题】：MediaTimeline keeps playing after closing Window关闭窗口后 MediaTimeline 继续播放
【发布时间】：2014-11-29 13:44:06
【问题描述】：

我有这个代码：

        MediaTimeline timeline = new MediaTimeline(new Uri(@path, UriKind.Relative));
        MediaClock clock = timeline.CreateClock();
        System.Windows.Media.MediaPlayer player = new System.Windows.Media.MediaPlayer();
        player.Clock = clock;
        VideoDrawing drawing = new VideoDrawing();
        drawing.Rect = new Rect(0, 0, 300, 200);
        drawing.Player = player;
        DrawingBrush brush = new DrawingBrush(drawing);
        New_WEBMPlayer_Wnd.Background = brush;

使用新窗口运行以播放该特定文件...问题是如果我关闭窗口，声音会继续播放。所以我也猜视频。关闭后如何停止？

【问题讨论】：

标签： c# wpf

【解决方案1】：

您需要通过clock 停止播放器，因为播放器现在由其Clock 控制。如果您直接停止播放器（不是通过Clock），您将获得InvalidOperationException。

PresentationCore.dll 中出现“System.InvalidOperationException”类型的未处理异常

附加信息：在为媒体播放器分配时钟时无法执行此操作。

首先，制作时钟controllable。

MediaClock clock = timeline.CreateClock(true) as MediaClock;

然后你这样阻止玩家，

if (clock.CurrentState != ClockState.Stopped)
{
    clock.Controller.Stop();
}

总结一下，工作代码是这样的

MediaTimeline timeline = new MediaTimeline(new Uri(@path, UriKind.Relative));
MediaClock clock = timeline.CreateClock(true) as MediaClock; //make the clock controllable
MediaPlayer player = new MediaPlayer();
player.Clock = clock;
VideoDrawing drawing = new VideoDrawing();
drawing.Rect = new Rect(0, 0, 300, 200);
drawing.Player = player;
DrawingBrush brush = new DrawingBrush(drawing);
New_WEBMPlayer_Wnd.Background = brush;

//stop the clock when player window is closed
New_WEBMPlayer_Wnd.Closed += (s, e) =>
{
    if (clock.CurrentState != ClockState.Stopped)
    {
        clock.Controller.Stop();
    }
};

【讨论】：