c# - 索引 WPF 选项卡控件

Question

我已通过 ViewModel 属性将选项卡控件绑定(bind)到集合。我希望选项卡标题反射(reflect)它显示的项目的索引，但这似乎非常困难。是否有捷径可寻？

   <TabControl
            Style ="{StaticResource GtlTabControl}"
            ItemsSource="{Binding Images}"
            SelectedIndex="{Binding CurrentImageIndex}">
        <TabControl.ItemContainerStyle>
            <Style TargetType="TabItem">
                <Setter Property="Header" Value="???"/>
            </Style>
        </TabControl.ItemContainerStyle>
       ...
   </TabControl>

Answer 1

您可以在 xaml 中使用 AlternationIndex。像这样的东西:

<TabControl Style ="{StaticResource GtlTabControl}"
    ItemsSource="{Binding Images}"
    SelectedIndex="{Binding CurrentImageIndex}"
    AlternationCount="{Binding Path=Items.Count, RelativeSource={RelativeSource Self}}">
    <TabControl.ItemContainerStyle>
        <Style TargetType="TabItem">
            <Setter Property="Header" Value="{Binding Path=(ItemsControl.AlternationIndex), RelativeSource={RelativeSource  FindAncestor, AncestorType=TabItem}}"/>
        </Style>
    </TabControl.ItemContainerStyle>
</TabControl>

这里还发布了替代方案:Show SelectedIndex in WPF Tabcontrol header template