WFC Dataservices populate relations

Question

I need help with getting a list of persons with the list addresses (address is a property on Person) from a WCF Dataservices to my WP7 app.

I got this method in a WCF DataServices, that get the data using EF

[WebGet]
public IQueryable<Person> GetPersonAdress(int id)
{
   return from p in CurrentDataSource.Persons.Include("Addresses")
          from a in c.Addresses
          where a.Field1 > 1
          where a.Field2 == id
          select p;
 }

and in my WP7 app, I got a DataServices class looking like this, where I call the method. but it doesn´t work. BeginExecute exit out before BeginLoadProperty completes ...

public class DataServices : IDataServices
{
    public void LoadPersonAddress(Action<IEnumerable<Person>, Exception> callback, int id)
    {
        try
        {
            var queryString = string.Format("GetPersonAdress?id={0}", id);

            _context.BeginExecute<Person>(new Uri(queryString, UriKind.Relative), (ar =>
            {
                var ctx = ar.AsyncState as DBEntities;
                var persons = new List<Person>();

                var results = ctx.EndExecute<Person>(ar);

                foreach (var person in results)
                {
                    var newPerson = new Person
                    {
                        Id = person.Id,
                        FirstName = person.FirstName,
                        LastName = person.LastName,
                    };

                    ctx.BeginLoadProperty(person, "Adresses", (asb =>
                    {
                        ctx.EndLoadProperty(asb);

                    }), person);

                    persons.Add(newPerson);
                }
                callback(persons, null);

            }), _context);
        }
        catch (Exception ex)
        {
            callback(null, ex);
        }
    }
}

How do I get the Address list in a person populated ?

Answer 1

Try:

~/GetPersonAddress?id=12345&$expand=Addresses