/// <summary> /// Scroll the ScrollViewer down by a page. /// /// </summary> /// <param name="viewer">The ScrollViewer.</param><exception cref="T:System.ArgumentNullException"><paramref name="viewer"/> is null. /// </exception> public static void PageDown(this ScrollViewer viewer) { if (viewer == null) { throw new ArgumentNullException("viewer"); } ScrollViewerExtensions.ScrollByVerticalOffset(viewer, viewer.ViewportHeight); }
/// <summary> /// Scroll the ScrollViewer down by a line. /// /// </summary> /// <param name="viewer">The ScrollViewer.</param><exception cref="T:System.ArgumentNullException"><paramref name="viewer"/> is null. /// </exception> public static void LineDown(this ScrollViewer viewer) { if (viewer == null) { throw new ArgumentNullException("viewer"); } ScrollViewerExtensions.ScrollByVerticalOffset(viewer, 16.0); }