You can use a RemoteInvokable method to switch pages of a Tiff file by opening the same image at a different frame index. Something like this:
// Open a particular frame
[RemoteInvokable]
public void Remote_LoadFrame(string url, int frame)
{
this.WebAnnotationViewer1.OpenUrl(url, frame);
}
The current version of the WebAnnotationViewer(5.0d) does not work inside an UpdatePanel, however, it is possible to use the WebAnnotationViewer along side an UpdatePanel.
David Cilley
My AJAX Imaging BlogAtalasoft Development Team