Silverlight RIA request only returns 1 - linq

Question

I have the following code...
internal sealed class Menu_Metadata
{
private Menu_Metadata() { }
[Key]
public int MenuHeaderID { get; set; }
public string MenuHeaderName { get; set; }
[Include]
[Association("MenuHeader_MenuItem", "MenuHeaderID", "MenuHeaderID")]
public IEnumerable<MenuItem> MenuItems { get; set; }
}
public class EmployeeMenuItem
{
[Key]
public int MenuItemID { get; set; }
public int MenuHeaderID { get; set; }
public string MenuItemName { get; set; }
}
[MetadataType(typeof(Menu_Metadata))]
public class EmployeeMenu
{
public int MenuHeaderID { get; set; }
public string MenuHeaderName { get; set; }
public IEnumerable<EmployeeMenuItem> MenuItems { get; set; }
}
[EnableClientAccess()]
public class EmployeeMenuService : DomainService
{
public IQueryable<EmployeeMenu> GetEmployeeMenu()
{
BusinessLogic.Employee blEmployee = new BusinessLogic.Employee();
int employeeId = blEmployee.GetEmployeeIdFromUserName(HttpContext.Current.User.Identity.Name);
var menuHeaders = blEmployee.GetEmployeeMenuHeaders(employeeId);
// This works here!
IQueryable<EmployeeMenu> retValue = from mh in menuHeaders
select new EmployeeMenu
{
MenuHeaderID = mh.ID,
MenuHeaderName = mh.HeaderName,
MenuItems = from mhi in mh.MenuHeaderItems
select new EmployeeMenuItem
{
MenuItemID = mhi.MenuItemID,
MenuHeaderID = mhi.MenuHeaderID,
MenuItemName = mhi.MenuItem.MenuItemName
}
};
return retValue;
}
}
which is consumed by a Silverlight Accordion control
EmployeeMenuContext employeeMenuContext = new EmployeeMenuContext();
accordion2.ItemsSource = employeeMenuContext.EmployeeMenus;
employeeMenuContext.Load(employeeMenuContext.GetEmployeeMenuQuery());
The MenuHeaderName's are coming through just fine, and the MenuItems is populated for the 1st MenuHeader, but the other 3 MenuItems are empty.
Any ideas why?
At what point is it easier to use EF4 and RIA??? This seems so incredibly and needlessly complex to get a simple Entity with a sub-class in it!

Answer 1

I'm not entirely sure, but it appears that the problem may have been that I was trying to databind in the xaml constructor. I created a Loaded event and moved the code there and it seems to work now.