/// <summary>
/// Gets the Panel that contains the containers of an ItemsControl.
/// </summary>
/// <param name="control">The ItemsControl.</param>
/// <returns>
/// The Panel that contains the containers of an ItemsControl, or null
/// if the Panel could not be found.
/// </returns>
/// <exception cref="T:System.ArgumentNullException">
/// <paramref name="control" /> is null.
/// </exception>
public static Panel GetItemsHost(this ItemsControl control)
{
if (control == null)
{
throw new ArgumentNullException("control");
}
// Get the first live container
DependencyObject container = control.ItemContainerGenerator.ContainerFromIndex(0);
if (container != null)
{
return(VisualTreeHelper.GetParent(container) as Panel);
}
FrameworkElement rootVisual = control.GetVisualChildren().FirstOrDefault() as FrameworkElement;
if (rootVisual != null)
{
ItemsPresenter presenter = rootVisual.GetLogicalDescendents().OfType <ItemsPresenter>().FirstOrDefault();
if (presenter != null && VisualTreeHelper.GetChildrenCount(presenter) > 0)
{
return(VisualTreeHelper.GetChild(presenter, 0) as Panel);
}
}
return(null);
}