Question

I wanted to make simple navigation with passing data between two frames in Windows Store App.

When i start from MainPage, navigating to BlankPage

 private void goTo_BlankPage()
    {
        this.Frame.Navigate(typeof(BlankPage),multimedia);
    }

And then i use BackButton:

<Button x:Name="backButton" Click="GoBack" IsEnabled="{Binding Frame.CanGoBack, ElementName=pageRoot}" Style="{StaticResource BackButtonStyle}"/>

Everything goes fine.

But when i add:

protected override void OnNavigatedTo(NavigationEventArgs e){}

to BlankPage (so i can handle passed data), and then try to go back from it, i’m getting System.ArgumentNullException.

What may be wrong?

Answer 1

try this

Call base.OnNavigatedTo in the overriden OnNavigatedTo method.

App must be doing something in the base method which it might be needing in case of going back