给出以下XAML;
<Grid>
<Grid.RowDefinitions>
<RowDefinition MinHeight="100"/>
<RowDefinition Height="2"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Border Grid.Row="0"
Background="LightBlue">
<Button Height="30"
Click="Button_Click">Hide Lower Panel</Button>
</Border>
<GridSplitter Grid.Row="1"
ResizeDirection="Rows"
Width="Auto"
HorizontalAlignment="Stretch"
Margin="0"
x:Name="Splitter"/>
<Border Grid.Row="2"
Background="LightCoral"
x:Name="LowerPanel" MinHeight="25"/>
</Grid>
Button_Click
的位置;
this.LowerPanel.Visibility = this.LowerPanel.Visibility == Visibility.Visible
? Visibility.Collapsed
: Visibility.Visible;
这看起来像这样;
如果在执行任何其他操作之前单击该按钮,则会按预期折叠;
但是,如果我使用网格分割器调整大小..
然后当我按下按钮时,会发生以下情况;
有没有办法让下面的元素在调整大小后再次正确折叠?
注意:出于这个问题的目的,我只使用了代码隐藏的事件处理程序和一个按钮来触发它,但在现实生活中,它以适当的MVVM方式完成,可见性为由视图模型上的绑定属性确定。
答案 0 :(得分:5)
AFAIK,当使用GridSplitter时,它会重写相应RowDefinitions和ColumnDefinitions的Height或Width属性。为了做你想做的事,你应该使用RowDefinitions.Height属性,如下所示:
public MainWindow()
{
InitializeComponent();
//gr is the name of the Grid
basepr1 = gr.RowDefinitions[0].Height;
basepr2 = gr.RowDefinitions[2].Height;
}
static GridLength zero = new GridLength(0);
GridLength basepr1;
GridLength basepr2;
private void Button_Click(object sender, RoutedEventArgs e)
{
if (this.LowerPanel.Visibility == Visibility.Visible)
{
this.LowerPanel.Visibility = Visibility.Collapsed;
basepr2 = gr.RowDefinitions[2].Height; // remember previos height
gr.RowDefinitions[2].Height = zero;
}
else
{
this.LowerPanel.Visibility = Visibility.Visible;
gr.RowDefinitions[2].Height = basepr2;
}
}
答案 1 :(得分:0)
我认为你需要将其中一个行定义标记为'*':
<Grid.RowDefinitions>
<RowDefinition MinHeight="100"/>
<RowDefinition Height="2"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>