Hi all I am a newbie and using Umbraco version 7.11.1. I integrated Archetype package in my site and got an exception. Now what I want to do is, I want to make a section/widget of RecentArticles on homepage in my site using Archetype. For this, I installed package and enter the fieldset properties, (You can see the pics below). Then I made my model class RecentArticles and then controller. All the code is given below. Important point is I have got the exception before writing the code for using Archetype in razor. I only write code for controller and got exception.

In fact, I have followed the lecture of an Umbraco MVP Paul Seal. Lecture URL is https://www.youtube.com/watch?v=tabQKn1JZkM&index=7&list=PL90L_HquhD--OWQNLyO1-KRxVDd0NPBfZ . I did the same as he did, he build the code and "build succeeded" while I build and get exception.

My code of Home controller is as follows:

public class HomeController : SurfaceController
    {
        private const string Partial_View_Folder_Path = "~/Views/Partials/Home/";
    //RecentArticles
    public ActionResult RenderRecentArticles()
    {
        List<RecentArticles> model = new List<RecentArticles>();
        IPublishedContent homePage = CurrentPage.AncestorOrSelf(1).DescendantsOrSelf().Where(x => x.DocumentTypeAlias == "home").FirstOrDefault();
        ArchetypeModel recentArticles = homePage.GetPropertyValue<ArchetypeModel>("recentArticles");

        foreach (ArchetypeFieldsetModel fieldset in recentArticles)
        { 
            int imageId = fieldset.GetValue<int>("image");
            var mediaItem = Umbraco.Media(imageId);
            string imageUrl = mediaItem.Url;

            int pageId = fieldset.GetValue<int>("page");
            IPublishedContent linkedToPage = Umbraco.TypedContent(pageId);
            string linkUrl = linkedToPage.Url;

            model.Add(new RecentArticles(fieldset.GetValue<string>("intro"), fieldset.GetValue<string>("authorName"),
                fieldset.GetValue<DateTime>("dateTime"), imageUrl, linkUrl));


        }
        return PartialView(Partial_View_Folder_Path + "_RecentArticles.cshtml");
        }
}

And the code of my RecentArticles model class model is:

public class RecentArticles
{
    public string Intro { get; set; }
    public string AuthorName { get; set; }
    public DateTime TimeOfPosted { get; set; }
    public string ImageUrl { get; set; }
    public string LinkUrl { get; set; }

    public RecentArticles(string intro, string authorName, DateTime timeOfPosted, string imageUrl, string linkUrl)
    {
        Intro = intro;
        AuthorName = authorName;
        TimeOfPosted = timeOfPosted;
        ImageUrl = imageUrl;
        LinkUrl = linkUrl;
    }
}

And the look and feel of my Archetype in umbraco backoffice is as follows:

Then I give fieldset properties in this data type as follows:

Finally, When he (Paul Seal) had built the solution to check the existence of errors then he didn’t get any error. While I compile it, I am still getting the following Null reference exception.

And when I put the breakpoint on code, I get the same exception of null, you can see below:

Now, what can I do? Why I am getting this null exception even I have added the data in Content section in Umbraco backoffice as depicted above. Any help will be strongly appreciated.

Zain