WPF: NavigationService NULL after visiting page 2

Question

Scenario:

I have a NavigationWindow style as follows:

<Style TargetType="NavigationWindow" x:Key="{x:Type NavigationWindow}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="NavigationWindow" >
                    ...
</Style>

I am launching my application with the loading of a page called Home.xaml. In Home.xaml, I have a button that goes to another page called PersonalData:

private void btnNewUser_Click(object sender, System.Windows.RoutedEventArgs e)
{
    PersonalData personalData = new PersonalData();
    this.NavigationService.Navigate(personalData);
}

This works great and the PersonalData page loads. On this second page, I have a Home button that will go to the main page:

    private void btnHome_Click(object sender, System.Windows.RoutedEventArgs e)
    {
        Home home = new Home();
        this.NavigationService.Navigate(home);
    }

I use "Navigation" here because I want to use this button again in later forms, to always have a button leading to the start page.

So, this also works, and the Home page loads. I can even click btnNewUser there a second time and again, the PersonalData page opens without any problems.

, "" , "this.NavigationService".

WPF, , . -?

Answer 1

KeepAlive = True ( , NavigationService).

, NavigationService , .

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