Question

I’m a newbie in windows phone development, so excuse me if my question is a stupid one.

I’ve developed a simple generic class intended to be a base class for all the pages in my WP7 applicaion. Here it goes:

namespace Subway.Rails
{
    public class Screen<TModel> : PhoneApplicationPage where TModel: class, new()
    {
        private static readonly DependencyProperty ModelProperty = DependencyProperty.Register("Model", typeof(TModel),
                                                                                               typeof (Screen<TModel>),
                                                                                               new PropertyMetadata(new TModel()));

        public TModel Model
        {
            get { return GetValue(ModelProperty) as TModel; }
            set { SetValue(ModelProperty, value); }
        }
    }
}

However when I am trying to declare a page in XAML using the x:TypeArguments directive

<rails:Screen x:TypeArguments="models:NotesStorage" xmlns:rails="clr-namespace:Subway.Rails;assembly=Subway.Rails" ...

and doubling the base type in the *.xaml.cs file

public partial class HomeView : Screen<NotesStorage>

I am getting a runtime error

Error   7   Using the generic type 'Subway.Rails.Screen<TModel>' requires 1 type arguments  D:\development\labs\mobilelab\Subway.Notes\Subway.Notes\obj\Debug\Views\HomeView.g.cs   37  50  Subway.Notes

in the generated file.

Are there any ways to instantiate the generic page in XAML?

Answer 1

Although I couldn’t find anything stating it officially (it’s always hard to find documentation on unsupported features) in general: when it is not supported in Silverlight it isn’t available on Windows Phone.

The error messages you are seeing seem to confirm this.