How to pass parameters to the constructor through Frame.Navigate in C++/WinRT?

Question

I just tried to use box_value, but it seems that the non-parameterized constructor will be always called. After I deleted the default constructor, XamlUserType::ActivateInstance() just crashed with null pointer exception.

How to navigate to Parametrised Constructor in UWP?

I found a C# version of solution to this problem, but I'm not sure what is the equivalent way in C++/WinRT.

Answer 1

As Raymond Chen said, you need to get your parameters in OnNavigatedTo. You can refer to the following code.

//ConfigPage.xaml.h

void OnNavigatedTo(Microsoft::UI::Xaml::Navigation::NavigationEventArgs const&);
 
//ConfigPage.xaml.cpp

void ConfigPage::OnNavigatedTo(Microsoft::UI::Xaml::Navigation::NavigationEventArgs const& e)
{
   auto window = unbox_value<Microsoft::UI::Xaml::Window>(e.Parameter());     
}