UWP: DataTemplateSelector and SelectedItem

Question

How can I change the DataTemplate for the SelectedItem of ListView in UWP project? I\'m trying to use the

Answer 1

One way is to use RegisterPropertyChangedCallback to monitor the changes of the IsSelected property and then update the ContentTemplateSelector of the ListViewItem manually -

protected override DataTemplate SelectTemplateCore(object item, DependencyObject container)
{
    if (container is ListViewItem cont)
    {
        if (cont.Tag != null && long.TryParse(cont.Tag.ToString(), out var token))
        {
            cont.UnregisterPropertyChangedCallback(ListViewItem.IsSelectedProperty, token);
        }

        cont.Tag = cont.RegisterPropertyChangedCallback(ListViewItem.IsSelectedProperty, (s, e) =>
        {
            cont.ContentTemplateSelector = null;
            cont.ContentTemplateSelector = this;
        });

        if (cont.IsSelected)
        {
            return SelectedItemTemplate;
        }

        return DefaultTemplate;
    }

    return DefaultTemplate;
}