如何将命令绑定到在DataTemplate中生成的TreeViewItem的Selected属性？

public ICommand MyCommand { get; set; }

public MyViewModel()
{
    MyCommand = new RelayCommand(ExecuteMyCommand);
}

private void ExecuteMyCommand(object parameter)
{
    // 命令执行的逻辑
}

<TreeView>
    <TreeView.ItemTemplate>
        <DataTemplate>
            <TreeViewItem>
                <TreeViewItem.Header>
                    <!-- 标题内容 -->
                </TreeViewItem.Header>
                <TreeViewItem.Style>
                    <Style TargetType="TreeViewItem">
                        <Setter Property="IsSelected" Value="False"/>
                        <Style.Triggers>
                            <Trigger Property="IsSelected" Value="True">
                                <Setter Property="Command" Value="{Binding DataContext.MyCommand, RelativeSource={RelativeSource AncestorType={x:Type local:MyView}}}" />
                                <Setter Property="CommandParameter" Value="{Binding}" />
                            </Trigger>
                        </Style.Triggers>
                    </Style>
                </TreeViewItem.Style>
            </TreeViewItem>
        </DataTemplate>
    </TreeView.ItemTemplate>
</TreeView>