How do I use a WPF TreeView HierarchicalDataTemplate with LINQ to Entities?

Question

I\'ve got a Page class in my .edmx ADO.NET Entity Data Model file with with Parent and Children properties. It\'s for a hierarchy of Pages.

removed dead ImageSh

Answer 1

A different way: (well, very similar, but slightly different)

In your Window Load function:

PageEntities db = new PageEntities();
TreeViewPages.ItemsSource = db.Page.Where(u=>u.Parent==null);

Create a new file Page.cs

public partial class Page {
    public ObjectQuery LoadedChildren {
        get {
            var ret = Children;
            if(ret.IsLoaded==false) ret.Load();
            return ret;
        }
    }
}

In your XAML:

Its not tested, but you should get the general idea.