Gets or sets a value that is used to select a current page (thumbnails, bookmarks or attachments) programmatically on the navigation pane. You can also obtain the currently selected page that is opened on the navigation pane.
The NavigationPaneSelectedPage property returns one of the PdfNavigationPanePage enumeration values, except for Default.
The NavigationPaneSelectedPage property does not select a specified page on the navigation page in the following cases:
- a selected page is hidden using the NavigationPanePageVisibility property;
- the Bookmarks page is specified for a document that does not contain bookmarks.
When the NavigationPaneSelectedPage property is set to PdfNavigationPanePage.Default, the Bookmarks page is opened if a document contains bookmarks. Otherwise, the Thumbnails page is shown on the navigation pane.