Question

The sample code below for a button will trigger opening of a second page.

            <Button x:Name="btnSelect" Content="Select" HorizontalAlignment="Right" Margin="0,8,20,6" 
                Grid.Row="2" Width="200">
            <Custom:Interaction.Triggers>
                <Custom:EventTrigger EventName="Click">
                    <GalaSoft_MvvmLight_Command:EventToCommand x:Name="btnSelectClicked" 
                                                               Command="{Binding SelectEventPageCommand, Mode=OneWay}"/>
                </Custom:EventTrigger>
            </Custom:Interaction.Triggers>
        </Button> 

    public partial class MainPage : PhoneApplicationPage
{
    // Constructor
    public MainPage()
    {
        InitializeComponent();
    }


    private void ContentGrid_Loaded(object sender, System.Windows.RoutedEventArgs e)
    {
        Messenger.Default.Register<GoToPageMessage>(this, (action) => ReceiveMessage(action));
    }

    private object ReceiveMessage(GoToPageMessage action)
    {
        StringBuilder sb = new StringBuilder("/Views/");
        sb.Append(action.PageName);
        sb.Append(".xaml");
        NavigationService.Navigate(
           new System.Uri(sb.ToString(),
                 System.UriKind.Relative));
        return null;
    }
}

http://galasoft.ch/mvvm/getstarted/

Can anyone suggest how I can do the same using an ApplicationBarIconButton? I get an error Property ‘Triggers’ is not attachable to elements of type ApplicationBarIconButton.

Or should I just use CodeBehind?

    <phone:PhoneApplicationPage.ApplicationBar>
    <shell:ApplicationBar IsVisible="True" IsMenuEnabled="False">
        <shell:ApplicationBarIconButton IconUri="/Images/appbar_button1.png" Text="Button 1">

        </shell:ApplicationBarIconButton>

    </shell:ApplicationBar>
</phone:PhoneApplicationPage.ApplicationBar>

Answer 1

Yeap ApplicationBar is a little bit different fom other controls in Silverlight. I was able to use an ICommand by using this one:
http://blog.humann.info/post/2010/08/27/How-to-have-binding-on-the-ApplicationBar.aspx

or the Silverlight toolkit which offers some extensions as stated in this answer:
How to add an application bar to a user control in wp7 but I never used it.