[WPF] Change WPF DataGrid Cell Expander Background/Foreground

<DataTemplate.Triggers> <DataTrigger Binding="{Binding IsSelected,RelativeSource={RelativeSource AncestorType=DataGridCell}}" Value="True" > <Setter Property="Foreground" Value="White" TargetName="txtTitle" /> <Setter Property="Foreground" Value="White" TargetName="txtContent" /> </DataTrigger> </DataTemplate.Triggers>

참조: http://stackoverflow.com/questions/11199482/wpf-bind-listview-selected-item-to-expander-expanded