how to use panorama item selectionchanged

Question

I am attempting to detect the current panorama item that a user is currently on and then toggle an application bar icon button isenabled property accordingly. I have not had any

Answer 1

My solution is for WP8 but must be the same for WP7.x

First add a name on each PanoramaItem and use that one as a reference from your code. In my case I have x:Name = "piRegister" and x:Name = "piLogin"

On SelectionChanged event you must recreate your ApplicationBar:

private void Login_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
   string piName = (e.AddedItems[0] as PanoramaItem).Name;

   switch(piName)
   {
      case "piLogin":
         SetupAppBar_Signin();
         break;
      case "piRegister":
         SetupAppBar_Register();
         break;
   }
}

//use this code only if you need to setup the app bar from code
void SetupAppBar()
{
   ApplicationBar = new ApplicationBar();

   ApplicationBar.Mode = ApplicationBarMode.Default;
   ApplicationBar.Opacity = 1.0;
   ApplicationBar.IsVisible = true;
   ApplicationBar.IsMenuEnabled = true;
}


void SetupAppBar_Signin()
{   
   ApplicationBar.Buttons.Clear();

   ApplicationBarIconButton button1 = new ApplicationBarIconButton();
   button1.IconUri = new Uri("/icon.png", UriKind.Relative);
   button1.Text = "button 1";
   ApplicationBar.Buttons.Add(button1);
   button1.Click += new EventHandler(button1_Click);
}

void SetupAppBar_Register()
{   
   ApplicationBar.Buttons.Clear();

   ApplicationBarIconButton button1 = new ApplicationBarIconButton();
   button1.IconUri = new Uri("/icon.png", UriKind.Relative);
   button1.Text = "button 1";
   ApplicationBar.Buttons.Add(button1);
   button1.Click += new EventHandler(button1_Click);

   ApplicationBarIconButton button2 = new ApplicationBarIconButton();
   button2.IconUri = new Uri("/icon.png", UriKind.Relative);
   button2.Text = "button 1";
   ApplicationBar.Buttons.Add(button2);
   button2.Click += new EventHandler(button2_Click);
}