Change WPF DocumentViewer viewing mode

Question

Hello I've got the problem that when I just add a <DocumentViewer x:Name="docViewer" /> I get a toolbar what allow me to change the viewing mode of the XPS document like here:

But how can I do this programmatically? I cant find any property that do this and the MSDN and Google say nothing about this feature. Then I found the FlowDocumentReader control what have a ViewingMode property, however it can't display a XPS document. I can't believe that it is not possible to do this, I mean that function is available by default, I just want to change it programmatically...

Answer 1

DocuementViewer didn't exposed any property to change the ViewMode. But in case you want to change the ViewMode programmatically, you can execute the commands exposed by DocumentViewer which are as -

• DocumentViewer.FitToWidthCommand
• DocumentViewer.FitToHeightCommand
• DocumentViewer.FitToMaxPagesAcrossCommand

You can bind these commands to your custom button or programmatically you can change the ViewMode. Suppose you have a DocuementViewer named documentViewer, you can call these methods on this instance like this -

• documentViewer.FitToWidth()
• documentViewer.FitToHeight()
• documentViewer.FitToMaxPagesAcross()