private void CreateNewItemsSource()
{
TimeSpan timeout = TimeSpan.FromSeconds(2);
if (virtualPDFPages != null)
{
virtualPDFPages.CleanUpAllPages();
}
virtualPDFPages = new AsyncVirtualizingCollection <IEnumerable <PDFImage> >(imageProvider, parent.GetPagePer(), timeout);
itemsControl.ItemsSource = virtualPDFPages;
}
public void Unload()
{
scrollViewer.Visibility = System.Windows.Visibility.Collapsed;
scrollViewer.ScrollToHorizontalOffset(0);
scrollViewer.ScrollToVerticalOffset(0);
imageProvider = null;
if (virtualPDFPages != null)
{
virtualPDFPages.CleanUpAllPages();
virtualPDFPages = null;
}
itemsControl.ItemsSource = null;
}