WPF C#: Rearrange items in listbox via drag and drop

Question

I am trying to figure out how to move the items in a pre-populated listbox up and down via mouse drags.

I have looked at the Control.DoDragDrop method from microsof

Answer 1

I took dnr3's answer and altered it for implementation in XAML. Same result, just prefer doing what I can in XAML rather than in the code-behind.

In place of the code-behind:

Style itemContainerStyle = new Style(typeof(ListBoxItem));
itemContainerStyle.Setters.Add(new Setter(AllowDropProperty, true));
itemContainerStyle.Setters.Add(new EventSetter(PreviewMouseLeftButtonDownEvent, new MouseButtonEventHandler(s_PreviewMouseLeftButtonDown)));
itemContainerStyle.Setters.Add(new EventSetter(DropEvent, new DragEventHandler(listbox1_Drop)));
listbox1.ItemContainerStyle = itemContainerStyle;

Put this in the XAML:

This is mouse-handler placed in the code-behind of the XAML.

void s_PreviewMouseMoveEvent(object sender, MouseEventArgs e)
{
    if (sender is ListBoxItem && e.LeftButton == MouseButtonState.Pressed)
    {
        ListBoxItem draggedItem = sender as ListBoxItem;
        DragDrop.DoDragDrop(draggedItem, draggedItem.DataContext, DragDropEffects.Move);
        draggedItem.IsSelected = true;
    }
}