如何使Silverlight ScrollViewer滚动显示一个有焦点的子控件？

这是我的XAML：

<ScrollViewer Height="200" Width="200" KeyUp="ScrollViewer_KeyUp">
    <StackPanel>
        <Button Content="1" Height="20" />
        <Button Content="2" Height="20" />
        <Button Content="3" Height="20" />
        <Button Content="4" Height="20" />
        <Button Content="5" Height="20" />
        <Button Content="6" Height="20" />
        <Button Content="7" Height="20" />
        <Button Content="8" Height="20" />
        <Button Content="9" Height="20" />
    <Button Content="10" Height="20" />
        <Button Content="11" Height="20" />
        <Button Content="12" Height="20" />
        <Button Content="13" Height="20" />
        <Button Content="14" Height="20" />
        <Button Content="15" Height="20" />
        <Button Content="16" Height="20" />
        <Button Content="17" Height="20" />
        <Button Content="18" Height="20" />
        <Button Content="19" Height="20" />
        <Button Content="20" Height="20" />
    </StackPanel>
</ScrollViewer>

这是代码隐藏：

private void ScrollViewer_KeyUp(object sender,KeyEventArgs E)
{
    ScrollViewer scrollViewer = sender as ScrollViewer;
    FrameworkElement focusedElement = Focusmanager.GetFocusedElement() as FrameworkElement;
    GeneralTransform focusedVisualTransform = focusedElement.TransformToVisual(scrollViewer);
    Rect rectangle = focusedVisualTransform.TransformBounds(new Rect(new Point(focusedElement.Margin.Left,focusedElement.Margin.Top),focusedElement.RenderSizE));
    double newOffset = scrollViewer.VerticalOffset + (rectangle.bottom - scrollViewer.ViewportHeight);
    scrollViewer.ScrollToVerticalOffset(newOffset);
}

我做的是点击按钮#1和标签,直到我到达按钮#20.它为我工作尝试一下,让我知道它对你有用.