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Robert is a South African technology specialist with focus on Microsoft technologies. He is very passionate about teaching and sharing and is a Microsoft MVP & Ranger. Robert is a DZone MVB and is not an employee of DZone and has posted 75 posts at DZone. You can read more from them at their website. View Full User Profile

Windows Store App Development Snack: Change App Theme from Dark to Light

10.25.2012
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imageYou may have seen in Visual Studio & Blend the option to change the Windows Theme from dark (the default) to light. The problem is that is a runtime it seems to make zero difference and there is no way in Windows 8 to change it (like we had with Windows Phone).

The solution to this is to change it in the App.xaml file – but going to the Application node (the very first one) and adding RequestedTheme="Light" to switch to the light theme or RequestedTheme="Dark" to switch to the dark theme.

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This will have a massive impact on the overall appearance of your application!

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A word of warning – you may also see the runtime property for this under App.Current.RequestedTheme and assume you can change it at runtime, however that will raise a NotSupportedException. What you can do is set it on start-up, so if you want to change it “dynamically” the user will need to restart the app for the change to be applied (Microsoft has a sample to show this).
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Lastly an interesting tidbit from the documentation on this:

    This property is ignored if the user is running in high contrast mode.
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Published at DZone with permission of Robert Maclean, author and DZone MVB. (source)

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