从0动画组框的高度，以汽车 [英] Animate height of groupbox from 0 to auto

问题描述

我像个在我的应用程序扩展groupboxes。当我需要一个COLAPSE我分组框中其高度相当于设置为0，当我需要展开我设置它的高度等于自动（double.Nan）是更多钞票用故事板做到这一点。我怎么能预先知道汽车的高度。防爆pression融合并不能使我动画到自动。

I have groupboxes acting like expanders in my application. When I need to colapse a groupbox I set its height equal to 0. when I need to expand it I set it's height equal to auto (double.Nan) is it posible to do this with a storyboard. How could I know the auto height in advance. Expression blend does not enable me to animate to an auto.

推荐答案

您可以使用此ScaleTransform

You can use ScaleTransform for this

<GroupBox Header="GroupBox">
    <GroupBox.RenderTransform>
        <ScaleTransform ScaleY="1"/>
    </GroupBox.RenderTransform>
</GroupBox>

当折叠组框设置ScaleTransform.ScaleX为0。而当扩大设置为​​1。

When collapse a groupbox set ScaleTransform.ScaleX to 0. And when expand set to 1.

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