删除用户控件时，WPF Stackpanel 高度未调整大小

Question

I have a stackpanel in a grid row with the row height set to auto.

I add user controls at runtime and the height resizes fine, when removing the user controls the height does not reduce though. I have tried to clear the stackpanel children, remove them one by one and also implemented IDisposable in each user control but when the child count shows zero the height has not reduced.

Sample XAML below, any help would be welcomed please?

<Grid x:Name="TestGrid">
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto" />
        <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>
    <StackPanel Orientation="Horizontal">
        <TextBlock Text="Test Header" Style="{StaticResource SubHeaderTextBlock}" />
    </StackPanel>
    <StackPanel x:Name="ChildItems" Grid.Row="1" />
</Grid>

Answer 1

Replace the StackPanel with a Grid. Grids stretch and retract better than StackPanels.

Answer 2

已删除放置Visibility Collapsed