wpf - 将 ListBox 选定颜色绑定到 SelectedItem 的属性

Question

我有一个ListBox绑定到ObservableCollection<ToDoCategory>as的控件ItemsSource="{Binding Categories}。里面ToDoCategory有CategoryNameand CategoryColor（两个字符串）。CategoryName绑定在ItemTemplate. 现在，我想做的是更改ListBox基于CategoryColor. 我已经有要刷的字符串，IValueConverter它返回SolidColorBrush字符串。它也在页面资源中正确定义。我知道我需要改变ItemContainerStyle。目前，我有这样的事情：

<Style x:Key="CategoryListBoxContainerStyle" TargetType="ListBoxItem">
Setter Property="Template">
    <Setter.Value>
        <ControlTemplate TargetType="ListBoxItem">
            <Border...>
            <VisualStateManager.VisualStateGroups>
                <VisualState x:Name="Selected">
                    <Storyboard>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Background" Storyboard.TargetName="InnerGrid">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="{Binding CategoryColor, Converter=StringToBrushConverter}"/>
                        </ObjectAnimationUsingKeyFrames>
                        <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Foreground" Storyboard.TargetName="ContentPresenter">
                            <DiscreteObjectKeyFrame KeyTime="0" Value="{StaticResource ListBoxItemSelectedForegroundThemeBrush}"/>
                        </ObjectAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>
                .
                .
                .
</style>

这行不通。如何将 InnerGrid 的背景绑定CategoryColor到ToDoCategory?