windows phone 7 - Hide Application Bar Icon Programmatically in a WP7 Silverlight Application?

Question

I have a Windows Phone 7 application built in Silverlight. This application makes use of the application bar. If the has purchased the application, I want to hide one of the buttons in the application bar. However, I've noticed that the ApplicationIconButton class does not expose a "Visibility" property. At the same time, I did not see a way to dynamically populate the application bar at runtime.

Can anybody provide some insight into this? Is this possible? If so, how?

Thanks!

Answer 1

Application bar buttons work in an index-based way rather than object-based like you would expect. Therefore, you need to specify a button index whenever you want to perform a specific action on it (e.g. disable).

For example:

ApplicationBarIconButton b = (ApplicationBarIconButton)ApplicationBar.Buttons[0];
b.IsEnabled = false;

This being said, you can create new ApplicationBarIconButton instances and pass them to ApplicationBar:

for (int i = 0; i < 2; i++)
{
    ApplicationBarIconButton b = new ApplicationBarIconButton();
    b.Text = i.ToString();
    b.IconUri = new Uri("/Images/icon1.png", UriKind.Relative);
    ApplicationBar.Buttons.Add(b);
}

When removing buttons, you can simply use RemoveAt, given that you know the index of the button to remove:

ApplicationBar.Buttons.RemoveAt(0);