Silverlight – Why can’t I get the keyboard input event in full screen mode?

public Page() 
{

InitializeComponent();

btnFullScreen.Click += new RoutedEventHandler(btnFullScreen_Click); 
}

void btnFullScreen_Click( object sender, RoutedEventArgs e) 
{

Application.Current.Host.Content.IsFullScreen = !Application.Current.Host.Content.IsFullScreen; 
if (!Application.Current .Host.Content.IsFullScreen)

btnFullScreen.Content = "Go Full Screen"; 
else

btnFullScreen.Content = "Go Normal Screen"; 
}

I have encountered some problems in Silverlight full screen mode.

If I switch the application to full screen, then Does not process all keyboard input. There is no text box input, no keystrokes/key events, and there may be more. Here is a sample application that demonstrates this:

Xaml:

< p>Behind the code:

public Page() 
{

InitializeComponent();

btnFullScreen. Click += new RoutedEventHandler(btnFullScreen_Click); 
}

void btnFullScreen_Click(object sender, RoutedEventArgs e) 
{

Application.Current.Host. Content.IsFullScreen = !Application.Current.Host.Content.IsFullScreen; 
if (!Application.Current.Host.Content.IsFullScreen)

btnFullScreen.Content = "Go Full Screen"; 
else

btnFullScreen.Content = "Go Normal Screen"; 
}

It is easy to see that in full screen mode, you cannot Write text in. Am I doing something wrong here? Is there any other way to switch full screen, so this won’t happen?

This link can help you: http://silverlight.net/forums/p/11519/36798.aspx

Edit

This MSDN article gives a more detailed reason:

When a Silverlight plug-in is in full-screen mode , it disables most keyboard events. This limitation of keyboard input during full-screen mode is a security feature, and is intended to minimize the possibility of unintended information being entered by a user. In full-screen mode, the only input allowed is through the following keys.

UP ARROW, DOWN ARROW, LEFT ARROW, RIGHT ARROW, SPACEBAR, TAB, PAGE UP, PAGE DOWN, HOME, END, ENTER