It didn't work, same error :(

Hi,

Sorry it is IsVisible() forgot that it was a method.

-Joep

For what i've read, it is a problem on "using System.Linq" but i do have that on my project, just says it's unnecessary dont know why

Hi,

I think you are following the same video as in this post.: https://our.umbraco.com/forum/using-umbraco-and-getting-started/101110-code-error

Its quite a long thread but the basics are in this reply: https://our.umbraco.com/forum/using-umbraco-and-getting-started/101110-code-error#comment-317042

Hi Kevin,

The previous error dissapeared, but now i'm getting "Value cannot be null Parameter name: Collection", my code is as follows (as the video teaches me)

public List<NavigationList> GetNavigationModel()
    {

        int pageId = int.Parse(CurrentPage.Path.Split(',')[1]);
        IPublishedContent pageInfo = Umbraco.Content(pageId);
        var nav = new List<NavigationList>
        {
            new NavigationList (new NavigationLinkInfo(pageInfo.Url,pageInfo.Name))
        };

        nav.AddRange(GetSubNavigationList(pageInfo));

        return nav;

    }

The error says it's in the line that has:

nav.AddRange(GetSubNavigationList(pageInfo));

Hi

That might be because there are no items in the navigation,

On your GetSubNavigationList method i would change

    List<NavigationList> navList = null;

to

    List<NavigationList> navList = new List<NavigationList>(); 

this will mean the list is always something even if it's empty. and that will stop the next bit throwing an error when there are no pages to put in the list.

I've had a google, i think the main problem is the video you are looking at was for Umbraco 6/7 and in Umbraco 8 you can't do 'dynamics' anymore :( so anywhere where 'dynamic' is used the code is going to need to be re-written

Is there any begginers tutorial for 8 then? because not knowing how to do things, is hard :/