This is still not accurate
This also relies on all pages being the same size. This isn’t always the case in PDF documents.
I’m using the latest version of the controls.
Here is the solution that seems to work for me: (PART_ScrollViewer seems to be the name of the scrollviewer that controls the actual page)
Since you would have direct access to that scrollviewer, you really would only need the first method.
private static void ScrollPage(this PdfViewerControl pdf, bool pageDown)
{
var sv = pdf.FindVisualChild<ScrollViewer>("PART_ScrollViewer");
sv.ScrollToVerticalOffset(sv.ContentVerticalOffset + (pageDown ? sv.ViewportHeight * .95 : -sv.ViewportHeight *.95));
}
public static IEnumerable<T> FindVisualChildren<T>(this DependencyObject depObj) where T : DependencyObject
{
if (depObj != null)
{
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
{
DependencyObject child = VisualTreeHelper.GetChild(depObj, i);
if (child != null && child is T)
{
yield return (T)child;
}
foreach (T childOfChild in FindVisualChildren<T>(child))
{
yield return childOfChild;
}
}
}
}
public static childItem FindVisualChild<childItem>(this DependencyObject obj, string name) where childItem : FrameworkElement
{
foreach (childItem child in FindVisualChildren<childItem>(obj))
{
if (child.Name == name) return child;
}
return null;
}
