Windows::UI::Xaml::HorizontalAlignment versus Windows::UI::Xaml::FrameworkAlignment::HorizontalAlignment

Question

Since HorizontalAlignment is in fact a member of Windows::UI::Xaml to which I have a using statement, I'm puzzled why

 HorizontalAlignment::Center produces the following compiler error:

blankpage.xaml.cpp(43): error C2039: 'Center' : is not a member of 'Windows::UI::Xaml::FrameworkElement::HorizontalAlignment'

using namespace Windows::UI::Xaml;


void BlankPage::OnNavigatedTo(NavigationEventArgs^ e)
{
	TextBlock^ dynTextBlock = ref new TextBlock(); 

	dynTextBlock->Text= "dynTextBlock created dynamically";
	dynTextBlock->HorizontalAlignment= Windows::UI::Xaml::HorizontalAlignment::Center;
  	dynTextBlock->HorizontalAlignment=                    HorizontalAlignment::Center;
	myGrid->Children->Append( dynTextBlock );
}
// Intellisense displays Windows::UI::Xaml::HorizontalAlignment  and   Windows::UI::Xaml::FrameworkAlignment::HorizontalAlignment
// for dynTextBlock->Horizontal alignment 

Answer 1

 

Hello,

 

I think the complier treat HorizontalAlignment as the FrameworkElement.HorizontalAlignment property

http://msdn.microsoft.com/en-us/library/windows/apps/windows.ui.xaml.frameworkelement.horizontalalignment

 

So that you need to add the whole path of it.

 

Best regards,

Jesse

---

Jesse Jiang [MSFT]
MSDN Community Support | Feedback to us

Answer 2

I can work around it, but I still don't understand WHY the compiler trys to resolve HorizontalAlignment::Center

as 

Windows::UI::Xaml::FrameworkElement::HorizontalAlignment

instead of

Windows::UI::Xaml::HorizontalAlignment::Center

when there is a

using namespace Windows::UI::Xaml;

present.

Answer 3

The behavior you were expecting, exists when using C#.

I'm also seeing the unexpected behavior you reported applies to all the enum types I've tried so far in the Windows::UI::XAML namespace.

Could you please file a Visual Studio bug on this issue please? Let me know if you do not, so I can create one on your behalf. VS 20111 Bug form

---

David Lamb

Answer 4

We can skip the bug report because I just applied the latest updates to VS11 Beta:

Microsoft Visual Studio 11
Version 11.0.50323.1 QRELB
Microsoft Visual C++ 11 Beta   04167-115-2600346-58856

and now the below line compile correctly and Intellisense is aware too.

dynTextBlock->TextAlignment= TextAlignment::Right;

Answer 5

I filled out a bug report because the problem may have regressed in the release candidate VS

https://connect.microsoft.com/VisualStudio/feedback/details/745947/c2039-error-on-mystackpanel-horizontalalignment-horizontalalignment-center

I get the compiler error:

error C2039: 'Center' : is not a member of 'Windows::UI::Xaml::FrameworkElement::HorizontalAlignment'

on

MyStackPanel->HorizontalAlignment=                    HorizontalAlignment::Center;