SupportedOrientations unavailable in XAML of windows phone 8.1 app?

Question

What is the equivalent of this in Windows Phone 8.1 App. When I create a new app, there is no more phone:ApplicationPage

<phone:PhoneApplicationPage
...
...
SupportedOrientations="Landscape" Orientation="LandscapeLeft"
shell:SystemTray.IsVisible="False">

Answer 1

Yes, In windows phone 8.1, We can't set supportedOrientations in page's XAML. We can set supportedOrientations of App in Package.appxmanifest only.

Answer 2

You can force the orientation of any page via code, writing just after the this.InitializeComponent():

DisplayInformation.AutoRotationPreferences = DisplayOrientations.Landscape;

or

DisplayInformation.AutoRotationPreferences = DisplayOrientations.LandscapeFlipped;

or

DisplayInformation.AutoRotationPreferences = DisplayOrientations.Portrait;