C# 使用WPF情节提要进行正向和反向

我需要在故事板中寻求帮助。以下代码不起作用：

Storyboard StoryBoard;

public void Reverse()
            {
                StoryBoard.Pause(this);

                TimeSpan ts = new TimeSpan(0);
                ts.Subtract(TimeSpan.FromMilliseconds(1000));
                StoryBoard.Seek(this, ts, TimeSeekOrigin.BeginTime);
            }

public void Forward()
            {
                StoryBoard.Pause(this);

                TimeSpan ts = new TimeSpan(0);
                ts.Add(TimeSpan.FromMilliseconds(1000));
                StoryBoard.Seek(this, ts, TimeSeekOrigin.BeginTime);
            }

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提前感谢。

反向：

TimeSpan CurrentTime = (TimeSpan) StoryBoard.CurrentTime;
TimeSpan SubtractTime = CurrentTime.Subtract(new TimeSpan(FrameRate * (long)Math.Pow(10,4)));
StoryBoard.Seek(SubtractTime, TimeSeekOrigin.Duration);

TimeSpan CurrentTime = (TimeSpan) StoryBoard.CurrentTime;
TimeSpan AddTime = CurrentTime.Add(new TimeSpan(FrameRate * (long)Math.Pow(10,4)));
StoryBoard.Seek(AddTime, TimeSeekOrigin.Duration);

用于转发：

TimeSpan CurrentTime = (TimeSpan) StoryBoard.CurrentTime;
TimeSpan SubtractTime = CurrentTime.Subtract(new TimeSpan(FrameRate * (long)Math.Pow(10,4)));
StoryBoard.Seek(SubtractTime, TimeSeekOrigin.Duration);

TimeSpan CurrentTime = (TimeSpan) StoryBoard.CurrentTime;
TimeSpan AddTime = CurrentTime.Add(new TimeSpan(FrameRate * (long)Math.Pow(10,4)));
StoryBoard.Seek(AddTime, TimeSeekOrigin.Duration);

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你可以这么做

 Storyboard anime = (Storyboard)FindResource("Storyboard1");
        TimeSpan ts = new TimeSpan(0);
        anime.Seek(ts);
        anime.Stop();

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你真的应该比“不工作”更精确。你会犯什么错误？你期望会发生什么，会发生什么？你到底想做什么？好的。它没有抛出任何错误。它总是转到第一个剪辑。