AutoExpand treeview in WPF

Question

Is there a way to automatically expand all nodes from a treeview in WPF? I searched and didn\'t even find an expand function in the treeview property.

Thanks

Answer 1

if you want expand manually you can try

Xaml:

c#:

bool Expanded = false; 
// The event subscription method (for a button click)
private void ButtonExpand__Click(object sender, RoutedEventArgs e)
{
    Expanded = !Expanded;
    Style Style = new Style
    {
        TargetType = typeof(TreeViewItem)
    };

    Style.Setters.Add(new Setter(TreeViewItem.IsExpandedProperty, Expanded));
    TreePeople.ItemContainerStyle = Style;
}