想实现以下效果：
一开始用的是 <ListBox.GroupStyle>，点击也可以触发Checked的事件。但有个问题是，无法设置RadioButton的选中。 通过VisualTreeHelper也能找到RadioButton，但是设置IsChecked = true，不显示选中。
<!-- avi列表 --><ListBox ItemsSource="{Binding Source={StaticResource MiceVideosSource}}" HorizontalAlignment="left" Background="Transparent" BorderThickness="0" Margin="30,0,0,0" SelectedIndex="0"><ListBox.GroupStyle><GroupStyle><GroupStyle.HeaderTemplate><DataTemplate><StackPanel Orientation="Horizontal"><RadioButton Grid.Column="0" GroupName="MiceVideos" Checked="MiceVideosRadioButton_OnChecked" Tag="{Binding Name}"><RadioButton.RenderTransform><ScaleTransform ScaleX="1.5" ScaleY="1.5"/></RadioButton.RenderTransform></RadioButton><TextBlock Text="{Binding Name}" Style="{StaticResource HeadTitle2}" Margin="10,0,0,0"/></StackPanel></DataTemplate></GroupStyle.HeaderTemplate></GroupStyle></ListBox.GroupStyle><ListBox.ItemTemplate><DataTemplate><TextBlock Text="{Binding Name}" Style="{StaticResource TextBlockNormalStyle}" ToolTip="{Binding FullName}" Margin="20,0,0,0" ></TextBlock></DataTemplate></ListBox.ItemTemplate></ListBox></StackPanel>
</GroupBox>确定无法解决后，换了一种实现方式。采用ListBox套ListBox，代码如下：
<!-- avi列表 --><ListBox ItemsSource="{Binding MiceVideos}" HorizontalAlignment="left" Background="Transparent" BorderThickness="0" Margin="30,0,0,0" x:Name="MiceVideosListBox" ><ListBox.ItemContainerStyle><Style TargetType="ListBoxItem"><Setter Property="HorizontalAlignment" Value="Left" /><Setter Property="HorizontalContentAlignment" Value="Left" /></Style></ListBox.ItemContainerStyle><ListBox.ItemTemplate><DataTemplate><Grid><Grid.RowDefinitions><RowDefinition ></RowDefinition><RowDefinition ></RowDefinition></Grid.RowDefinitions><StackPanel Orientation="Horizontal" Grid.Row="0"><RadioButton GroupName="MiceVideos" Checked="MiceVideosRadioButton_OnChecked" Tag="{Binding GroupName}" x:Name="MiceGroupRadioButton" IsChecked="{Binding IsChecked }" ><RadioButton.RenderTransform><ScaleTransform ScaleX="1.5" ScaleY="1.5"/></RadioButton.RenderTransform></RadioButton><TextBlock Text="{Binding GroupName}" Style="{StaticResource TextBlockNormalStyle}" Margin="10,0,0,0"/></StackPanel><ListBox Grid.Row="1" ItemsSource="{Binding ChannelOptionList }" BorderThickness="0"><ListBox.ItemContainerStyle><Style TargetType="ListBoxItem"><Setter Property="HorizontalAlignment" Value="Left" /><Setter Property="HorizontalContentAlignment" Value="Left" /></Style></ListBox.ItemContainerStyle><ListBox.ItemTemplate><DataTemplate><StackPanel Orientation="Horizontal"><TextBlock Text="{Binding Name}" Style="{StaticResource TextBlockNormalStyle}" ToolTip="{Binding FullName}" Margin="20,0,0,0" ></TextBlock><Button Width="40" Command="{Binding DataContext.OpenCsvFileCommand, ElementName=MiceVideosListBox}" CommandParameter="{Binding}"attach:BorderElement.CornerRadius="6,6,6,6"Style="{StaticResource ButtonIcon}"attach:IconElement.Geometry="{StaticResource OpenFolderGeometry1}" Margin="10,0,0,0" /><TextBlock Text="{Binding CsvName}" Style="{StaticResource TextBlockNormalStyle}" ToolTip="{Binding CsvName}" Margin="10,0,0,0" ></TextBlock><Button VerticalAlignment="Center"Command="{Binding DataContext.FileDeleteCommand, ElementName=MiceVideosListBox}" CommandParameter="{Binding}"Style="{StaticResource ButtonIcon}"attach:IconElement.Geometry="{StaticResource DeleteGeometry}" Margin="10,0,0,0" Visibility="{Binding DeleteButtonVisibility}"/></StackPanel></DataTemplate></ListBox.ItemTemplate></ListBox></Grid></DataTemplate></ListBox.ItemTemplate></ListBox>RadioButtonGroup类，GroupName和IsChecked用于绑定最外层的ListBox，用于分组显示。ChannelOptionList用于绑定里面的ListBox，用于显示列表。RadioButton的IsChecked="{Binding IsChecked }" ，就可以设置是否选中了。
public class RadioButtonGroup{private string _groupName;/// <summary>/// 分组名称/// </summary>public string GroupName{get => _groupName;set{_groupName = value;}}private bool _isChecked;/// <summary>/// 分组名称/// </summary>public bool IsChecked{get => _isChecked;set{_isChecked = value;}}/// <summary>/// CellVideo的列表/// </summary>private ObservableCollection<ChannelOption> _channelOptionList = new();public ObservableCollection<ChannelOption> ChannelOptionList{get => _channelOptionList;set{_channelOptionList = value;}}}
