如何在ListView项的TextBox中设置焦点？

<ListView>
    <ListView.ItemContainerStyle>
        <Style TargetType="ListViewItem">
            <EventSetter Event="GotFocus" Handler="TextBox_GotFocus"/>
        </Style>
    </ListView.ItemContainerStyle>
    <ListView.ItemTemplate>
        <DataTemplate>
            <TextBox Text="{Binding}" />
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

private void TextBox_GotFocus(object sender, RoutedEventArgs e)
{
    ListViewItem listViewItem = FindAncestor<ListViewItem>((DependencyObject)sender);
    if (listViewItem != null)
    {
        listViewItem.Focus();
    }
}

private T FindAncestor<T>(DependencyObject current) where T : DependencyObject
{
    do
    {
        if (current is T ancestor)
        {
            return ancestor;
        }
        current = VisualTreeHelper.GetParent(current);
    }
    while (current != null);
    return null;
}