Panorama Page Layout Change? Windows Phone 7

Is there a way to know when the panorama view gets changed from say a current title "Settings" to "Help"? I need this so I know what view to open if they click the add button or remove appbar buttons.

So lets say we got a panerama view like:

How can we know when the user changed from the recent part to the part the phone is currently on or the network part?开发者_C百科

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The Panorama control raises a SelectionChanged event each time the user navigates from one PanoramaItem to the next. You can then determine the index of the current page by inspecting the SelectedIndex property.

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PanoramaControl has a property called SelectedIndex, which gives the index of the currently selected PanoramaItem. By this index you can decide which page has been selected.