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我的窗口缩略图上有一些ThumbnailToolBarButtons。一个是播放/暂停按钮。我实际上有两个按钮……一个用于播放，一个用于暂停。当我单击按钮时，它将隐藏一个并使用ThumbnailToolBarButtonVisible 属性显示另一个。但是，当我单击播放/暂停按钮时，窗口缩略图会显示出来，但ThumbnailToolBarButtons一切都会变得非常宽，突然间我只看到两个按钮。如果我让窗口缩略图消失并再次滚动它，我的所有按钮都会返回并且宽度正确。这里发生了什么？谢谢。

更新：好的。这是一些代码作为示例。

private ThumbnailToolBarButton buttonPrevious;
private ThumbnailToolBarButton buttonNext;
private ThumbnailToolBarButton buttonPlay;
private ThumbnailToolBarButton buttonPause;
private Boolean bPlaying = false;

private void Form1_Load(object sender, EventArgs e)
{
    buttonPrevious = new ThumbnailToolBarButton(Properties.Resources.previous, "Previous");
    buttonPrevious.Click += new EventHandler<ThumbnailButtonClickedEventArgs>(buttonPrevious_Click);
    buttonPrevious.Visible = true;

    buttonNext = new ThumbnailToolBarButton(Properties.Resources.next, "Next");
    buttonNext.Click += new EventHandler<ThumbnailButtonClickedEventArgs>(buttonNext_Click);
    buttonNext.Visible = true;

    buttonPlay = new ThumbnailToolBarButton(Properties.Resources.play, "Pause/Pause");
    buttonPlay.Click += new EventHandler<ThumbnailButtonClickedEventArgs>(buttonPlay_Click);
    buttonPlay.Visible = true;

    buttonPause = new ThumbnailToolBarButton(Properties.Resources.pause, "Play");
    buttonPause.Click += new EventHandler<ThumbnailButtonClickedEventArgs>(buttonPlay_Click);
    buttonPause.Visible = false;

    TaskbarManager.Instance.ThumbnailToolBars.AddButtons(this.Handle, buttonPrevious, buttonPlay, buttonPause, buttonNext);
}

private void buttonPlay_Click(object sender, ThumbnailButtonClickedEventArgs e)
{
    bPlaying = !bPlaying;

    buttonPlay.Visible = bPlaying ? false : true;
    buttonPause.Visible = bPlaying ? true : false;
}
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1 回答 1

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尝试将播放/暂停按钮合并为一个按钮，并在单击事件处理程序中编写：

if ( buttonPlayPause.Icon == Properties.Resources.play )
    buttonPlayPause.Icon = Properties.Resources.pause;
else
    buttonPlayPause.Icon = Properties.Resources.play;
于 2011-09-29T20:35:46.280 回答