XAML NavigateTo on Partial Views error

[YZahringer]

Description

NavigateTo on Partial Views does not work.

Steps to Reproduce

Add Button with NavigateTo command on PartialView.

Actual Behavior

System.ArgumentNullException: Value cannot be null. Parameter name: parentObject at Prism.Navigation.Xaml.NavigationExtensionBase.Initialize(IProvideValueTarget valueTargetProvider, IRootObjectProvider rootObjectProvider) at Prism.Navigation.Xaml.NavigationExtensionBase.ProvideValue(IServiceProvider serviceProvider)

Basic Information

• Version with issue: 7.1.0.279-pre
• Xamarin.Forms version: 3.2.0.871581
• IDE: VS2017 15.8.6

[brianlagunas]

You need to provide a sample as stated in the Issue template. I will re-open when a reproduction is provided. Your description doe not provide enough information.

[YZahringer]

Reproduction link: https://github.com/MADSENSE/Madsense.XamarinForms.Sample/tree/Prism-PartialView-NavigateTo

[dansiegel]

It would seem this is actually likely due to the use of XamlC. Effectively what you end up with is:

var partialView = new PartialView();
var page = new Page
{
    Content = partialView
};

The problem with this is that when the PartialView is constructed the Command is also set in your Button. This is a problem since we currently are trying to retrieve the ParentPage before there is one set. This needs to be refactored so that we grab the parent object and do no further analysis of it until we are ready to get the Parent Page when the Command is executing.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.