How can I use a type reference in a XAML / Universal Windows app?

Question

I want to encapsulate frame navigation in custom command und use this command declaratively as a static ressource. I found

Frame.Navigate(typeof(MainPage));

which expects a type parameter (type of the target page) to navigate to. My first attempt was to use a generic ICommand implementation that passes the type of the target page as generic type parameter. As of x:TypeArguments is not supported for Windows Store Apps, I tried to define a property

public Type TargetType { get; set; }

for the command. But no luck again: if I try to set the property via a xaml attribute

`<NavigationCommand TargetType="MainPage">

I get a compile-time error saying

MainPage is not supported in a Windows universal project

score 3 · Accepted Answer · answered Sep 07 '15 at 21:17

3

This should work:

<NavigationCommand TargetType="ns:MainPage">

Where ns is an XML namespace prefix declared with xmlns:ns="using:TheNamespaceInCode"

(note: the x:Type markup extension used in WPF isn't supported in WinRT)

answered Sep 07 '15 at 21:17

Thomas Levesque

286,951
70
623
758

Thanks for the fast reply! – ventiseis Sep 07 '15 at 21:23
Is there a trick to decipher the completly uninformative error message of the XAML compiler? ;-) At least, it didn't say "Unknown type" or something like that.. – ventiseis Sep 07 '15 at 21:25
1

@ventiseis, not that I know of ;) – Thomas Levesque Sep 08 '15 at 07:37

How can I use a type reference in a XAML / Universal Windows app?

1 Answers1