GridSplitter 可拖动

左右拖动

<GridSplitter Width="3" VerticalAlignment="Stretch" HorizontalAlignment="Center" ShowsPreview="False"/>

上下拖动

<GridSplitter Height="3" VerticalAlignment="Center" HorizontalAlignment="Stretch" ShowsPreview="False"/>

标签：拖动,左右,GridSplitter,上下
来源： https://www.cnblogs.com/wesson2019-blog/p/14948765.html