Windows Phone 7 Hiding the Application Bar

问题

I would like to be able to press a button to disable the menu bar in my application. If you go

menubar.IsVisible = false;

it throws a null reference exception. The menu bar is declared in XAML.

Anyone know if its possible to hide it on the fly like this?

回答1:

You can access this as a static member on ApplicationBar. i.e.

ApplicationBar.IsVisible = true/false;

Some background here on why ApplicationBar doesn't play like normal silverlight elements.

Why are the ApplicationBar objects not FrameworkElements? - Peter Torr's Blog

回答2:

Nevermind, I found it. You can't call the name you've given it, have to use applicationbar.isivisble = false

回答3:

To do it in code behind if you have not referenced it other than in XAML:

(ApplicationBar as ApplicationBar).IsVisible = true;

回答4:

ApplicationBar.IsVisible = false;

来源：https://stackoverflow.com/questions/4116311/windows-phone-7-hiding-the-application-bar