wpf - 儿童折叠后网格不减小尺寸

Question

这是程序的结构：

- window
  - styles
    - togglebutton
    - textblock
  - grid

网格中的每一行都是一个切换按钮，当我们单击切换按钮时，文本块会展开，当我们再次单击它时，文本块会折叠。

问题是当它展开时，窗口的大小会增加，但是当它折叠时它不会将大小减小到行大小。为此该怎么办？任何人都可以帮忙吗？

我尝试将 windows sizetocontent 属性设置为宽度和高度，但这不是问题。我认为与网格而不是窗口有关。

Answer 1

我认为你是在正确的方式，使用SizeToContent窗口的属性！

试试这个代码（声明转换器并更改引用！）：

C#IValueConverter用于子项的可见性

public sealed class BoolToVisibilityConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (value is bool)
        {
            if ((bool)value)
                return Visibility.Visible;
            else
                return Visibility.Collapsed;
        }
        else
            throw new NotImplementedException();
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

窗口的 XAML 代码

<Window x:Class="TestWpf.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:converters="clr-namespace:TestWpf.Converters"
        VerticalAlignment="Stretch"
        SizeToContent="WidthAndHeight"
        HorizontalContentAlignment="Stretch"
        VerticalContentAlignment="Stretch"
        Title="MainWindow">
<Window.Resources>
    <ResourceDictionary>
        <converters:BoolToVisibilityConverter x:Key="BoolToVisibilityConverter" />
    </ResourceDictionary>
</Window.Resources>
<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition />
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto" />
        <RowDefinition Height="Auto" />
        <RowDefinition Height="Auto" />
    </Grid.RowDefinitions>
    <!--Row 1-->
    <StackPanel Grid.Row="0"
                Orientation="Vertical">
        <ToggleButton Content="expand/collapse"
                      x:Name="Button1" />
        <TextBlock FontSize="30"
                   HorizontalAlignment="Center"
                   Visibility="{Binding Path=IsChecked, Mode=OneWay, Converter={StaticResource BoolToVisibilityConverter}, ElementName=Button1}"
                   Text="Sample Text 1" />
    </StackPanel>
    <!--Row 2-->
    <StackPanel Grid.Row="1"
                Orientation="Vertical">
        <ToggleButton Content="expand/collapse"
                      x:Name="Button2" />
        <TextBlock FontSize="30"
                   HorizontalAlignment="Center"
                   Visibility="{Binding Path=IsChecked, Mode=OneWay, Converter={StaticResource BoolToVisibilityConverter}, ElementName=Button2}"
                   Text="Sample Text 2" />
    </StackPanel>
    <!--Row 3-->
    <StackPanel Grid.Row="2"
                Orientation="Vertical">
        <ToggleButton Content="expand/collapse"
                      x:Name="Button3" />
        <TextBlock FontSize="30"
                   HorizontalAlignment="Center"
                   Visibility="{Binding Path=IsChecked, Mode=OneWay, Converter={StaticResource BoolToVisibilityConverter}, ElementName=Button3}"
                   Text="Sample Text 3" />
    </StackPanel>
    </Grid>
</Window>