Question

Now I’m developing a Windows Phone 7 app, my app has three buttons located at the applicaton bar. Here is the event handler for these three buttons:

    //app bar page navigation
    private void ApplicationBarIconButton_Click1(object sender, EventArgs e)
    {
        if(//check if the current displayed page is mainpage)
        {
            //do nothing
        }
        else
        {
            NavigationService.Navigate(new Uri("/MainPage.xaml", UriKind.RelativeOrAbsolute));
        }
    }

    private void ApplicationBarIconButton_Click2(object sender, EventArgs e)
    {
        NavigationService.Navigate(new Uri("/Audios.xaml", UriKind.RelativeOrAbsolute));
    }

    private void ApplicationBarIconButton_Click3(object sender, EventArgs e)
    {
        NavigationService.Navigate(new Uri("/Statistics.xaml", UriKind.RelativeOrAbsolute));
    }

The button navigation works well except the first one (Button_Click1) because when I first access the main page and click the first button the app will automatically go back to app list.

So I want to use if-else statement to check which page is currently displayed and then decide whether to navigate or stay in the current page.

Answer 1

Button click1 should be removed from the main page. It makes no sense to have that button there.

Other pages should use the back button to return to the main page. Otherwise you mess up your back stack.