【WPF】Datagrid显示最低下一跳

ScrollViewer scroll;
private void GridView_ScrollChanged(object sender, RoutedEventArgs e)
{
if (scroll == null)
{
DataGridAutomationPeer lvap = new DataGridAutomationPeer(sender as DataGrid);
var svap = lvap.GetPattern(PatternInterface.Scroll) as ScrollViewerAutomationPeer;
ScrollViewer scroll = svap.Owner as ScrollViewer;
scroll.ScrollToBottom();
}
}