仅通过 XAML 将复选框绑定到元素可见性

Question

我不明白为什么绑定不能这样工作？

<UserControl>
        <StackPanel>
            <CheckBox x:Name="CBTempA"  VerticalAlignment="Center" Margin="10,0,0,0"/>
            <Label VerticalAlignment="Center">Temp A</Label>
        </StackPanel>
        <lvc:CartesianChart>
            <lvc:CartesianChart.Series>
                <lvc:LineSeries Values="{Binding TempAValues}" Visibility="{Binding ElementName=CBTempA, Path=IsChecked, Converter={StaticResource BoolToVisibility}}"/>
            </lvc:CartesianChart.Series>
        </lvc:CartesianChart>
</UserControl>

Answer 1

转换器BoolToVisibility 将布尔值 (IsChecked) 转换为 System.Windows.Visibility 值。它可能看起来像这样：

public class BoolToVisibilityConverter : IValueConverter
{
    // value is a parameter from xaml (IsChecked)
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (value is bool)
        {
            return (bool) value ? System.Windows.Visibility.Visible : System.Windows.Visibility.Collapsed;
        }
        return System.Windows.Visibility.Collapsed;
    }

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