选项卡控制宽度wpf

我有一个有n个选项卡的选项卡控件。 我试图限制TabControl的宽度，这样，如果只剩下一个选项卡，那么当我调整包含TabControl的主窗口的大小时，它的标题将始终可见。

---

有什么建议吗？

如果只剩下一项，我通常会隐藏选项卡：

<TabControl ItemsSource="{Binding Data}">
    <TabControl.ItemContainerStyle>
        <Style TargetType="{x:Type TabItem}">
            <Style.Triggers>
                <DataTrigger Binding="{Binding RelativeSource={RelativeSource AncestorType=TabControl}, Path=Items.Count}"
                             Value="1">
                    <Setter Property="Visibility" Value="Collapsed"/>
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </TabControl.ItemContainerStyle>
</TabControl>

---

我不明白这个问题。调整窗口大小时，tabcontrol的tabitem标题是否消失？建议显示导致此行为的一些代码。

<TabControl.ItemContainerStyle>
    <Style TargetType="{x:Type TabItem}">
        <Style.Triggers>
            <DataTrigger Binding="{Binding RelativeSource={RelativeSource AncestorType=TabControl}, Path=Items.Count}"
                     Value="1">
                <Setter Property="Width" Value="{Binding RelativeSource={RelativeSource AncestorType=TabControl}, Path=ActualWidth}"/>
            </DataTrigger>
        </Style.Triggers>
    </Style>
</TabControl.ItemContainerStyle>

<Style TargetType="{x:Type TabItem}">
    <Style.Resources>
        <local:AddConverter x:Key="AddConverter"/>
    </Style.Resources>
    <Style.Triggers>
        <DataTrigger Binding="{Binding RelativeSource={RelativeSource AncestorType=TabControl}, Path=Items.Count}"
                 Value="1">
            <Setter Property="Width" Value="{Binding RelativeSource={RelativeSource AncestorType=TabControl},
                                                     Path=ActualWidth,
                                                     Converter={StaticResource AddConverter},
                                                     ConverterParameter=-5}"/>
        </DataTrigger>
    </Style.Triggers>
</Style>

public class AddConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        double input = (double)value;
        double input2 = double.Parse(parameter as string);
        return input + input2;
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        double input = (double)value;
        double input2 = double.Parse(parameter as string);
        return input - input2;
    }
}