WPF Selected ListViewItem: Using a ComboBox in the ItemTemplate - wpf

Question

I'm trying to create a DataTemplate for Items in a ListView which is in itself not a problem when I'm using TextBlocks.
When selecting an item in the ListView, it is highlighted as expected with a darker background and the TextBlocks have a white foreground.
However, when I add a ComboBox to the DataTemplate and when a row is highlighted, the ComboBox's forground remains black whether it's selected or not.
I am not applying any styles to ComboBoxes and other than the SelectedValue and ItemSource properties, I'm not doing anything else with the ComboBox.
Using the LivePropertyExplorer I can only see that the Foreground is "overriden" but cannot see where.
Help would be greatly appreciated!
<ListView DockPanel.Dock="Bottom"
BorderThickness="0,1,0,0"
Padding="3"
BorderBrush="LightGray"
MinHeight="150"
MaxHeight="150"
ItemContainerStyle="{StaticResource ListViewItemStyle25}">
<ListView.ItemTemplate>
<DataTemplate>
<DockPanel LastChildFill="False">
<DockPanel.Resources>
<Style TargetType="TextBlock">
<Setter Property="FontSize"
Value="14" />
<Setter Property="Background"
Value="Transparent" />
</Style>
</DockPanel.Resources>
<ComboBox BorderThickness="1"
Background="Transparent"
MinWidth="120"
MaxWidth="120"
FontSize="14"
IsSynchronizedWithCurrentItem="False"
SelectedValue="{Binding IResourceTravelDocument_TravelDocumentType}">
<ComboBox.Style>
<Style TargetType="{x:Type ComboBox}">
<Style.Triggers>
<DataTrigger Binding="{Binding IsPrimary, ElementName=userControl}"
Value="True">
<Setter Property="ItemsSource"
Value="{Binding DataContext.IResourceTravelDocumentsModuleViewModel_ResourceTravelDocumentTypes_Primary,
ElementName=userControl}" />
</DataTrigger>
<DataTrigger Binding="{Binding IsPrimary, ElementName=userControl}"
Value="False">
<Setter Property="ItemsSource"
Value="{Binding DataContext.IResourceTravelDocumentsModuleViewModel_ResourceTravelDocumentTypes_Supplementary,
ElementName=userControl}" />
</DataTrigger>
</Style.Triggers>
</Style>
</ComboBox.Style>
</ComboBox>
</DockPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
<Style x:Key="ListViewItemStyle" TargetType="{x:Type ListViewItem}">
<Setter Property="HorizontalContentAlignment"
Value="Stretch" />
<Setter Property="Background"
Value="Transparent" />
<Setter Property="VerticalContentAlignment"
Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
<Setter Property="Padding"
Value="2,0,0,0" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListViewItem}">
<Border x:Name="Bd"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
Background="{TemplateBinding Background}"
Padding="{TemplateBinding Padding}"
SnapsToDevicePixels="true">
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
</Border>
<ControlTemplate.Triggers>
<Trigger Property="ItemsControl.AlternationIndex"
Value="0">
<Setter Property="Background"
Value="White"></Setter>
</Trigger>
<Trigger Property="ItemsControl.AlternationIndex"
Value="1">
<Setter Property="Background"
Value="WhiteSmoke"></Setter>
</Trigger>
<Trigger Property="IsSelected"
Value="true">
<Setter Property="Background"
TargetName="Bd"
Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}" />
<Setter Property="Foreground"
Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}" />
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected"
Value="true" />
<Condition Property="Selector.IsSelectionActive"
Value="false" />
</MultiTrigger.Conditions>
<Setter Property="Background"
TargetName="Bd"
Value="RoyalBlue" />
<Setter Property="Foreground"
Value="AliceBlue" />
</MultiTrigger>
<Trigger Property="IsEnabled"
Value="false">
<Setter Property="Foreground"
Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>

Answer 1

The ComboBox has its own Template and doesn't inherit the Background and Foreground properties from the parent ListViewItem by default.
You can add another DataTrigger to the ComboBox style that binds to the ListViewItem though:
<Style TargetType="{x:Type ComboBox}">
<Style.Triggers>
<DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource AncestorType=ListViewItem}}" Value="true">
<Setter Property="Foreground" Value="AliceBlue" />
</DataTrigger>
<DataTrigger Binding="{Binding IsPrimary, ElementName=userControl}" Value="True">
<Setter Property="ItemsSource" Value="{Binding DataContext.IResourceTravelDocumentsModuleViewModel_ResourceTravelDocumentTypes_Primary, ElementName=userControl}" />
</DataTrigger>
<DataTrigger Binding="{Binding IsPrimary, ElementName=userControl}" Value="False">
<Setter Property="ItemsSource" Value="{Binding DataContext.IResourceTravelDocumentsModuleViewModel_ResourceTravelDocumentTypes_Supplementary, ElementName=userControl}" />
</DataTrigger>
</Style.Triggers>
</Style>