通過WCF導航屬性填充的實體框架

Question

我看過類似的問題，但尚未找到解決方案。 我試過使用

1. .Include("")
2. .Load()

但是當我通過WCF服務檢索導航屬性時，導航屬性仍然​​為空。

這是我的實體：

public class Person
{
    public int PersonID { get; set; }
    public string Name { get; set; }
    public virtual ICollection<Address> Addresses { get; set; }

    public Person()
    {
        this.Addresses = new List<Address>();
    }
}

public class Address
{
    public int AddressID { get; set; }
    public string AddressLine1 { get; set; }
    public virtual ICollection<Person> Residents { get; set; }

    public Address()
    {
        this.Residents = new List<Person>();
    }
}

我使用流利的API聲明兩個實體分別具有地址/居民的HasMany。 我的WCF服務代碼如下所示：

[ServiceBehavior(IncludeExceptionDetailInFaults = true)]
public class Repository : DataService<EFEntitiesDataContext>
{
    // This method is called only once to initialize service-wide policies.
    public static void InitializeService(DataServiceConfiguration config)
    {
        config.UseVerboseErrors = true;

        config.SetEntitySetAccessRule("*", EntitySetRights.All);
        config.SetServiceOperationAccessRule("*", ServiceOperationRights.All);

        config.DataServiceBehavior.MaxProtocolVersion = DataServiceProtocolVersion.V2;
    }

    protected override EFEntitiesDataContext CreateDataSource()
    {
        EFEntitiesDataContext dataSource = new EFEntitiesDataContext();
        dataSource.Configuration.ProxyCreationEnabled = false;
        dataSource.Configuration.LazyLoadingEnabled = true;
        return dataSource;
    }

    [WebGet]
    public IList<Person> GetAllPeople()
    {
        EFEntitiesDataContext context = this.CreateDataSource();
        return context.People.Include("Addresses").Where(n => n.Addresses.Any()).ToList();
    }
}

最后，我像這樣調用我的服務：

static void Main(string[] args)
{
    Uri uri = new Uri("http://localhost:49479/Repository.svc");

    RepositoryService.EFEntitiesDataContext repositoryService = new RepositoryService.EFEntitiesDataContext(uri);

    Uri uriRequest = new Uri(string.Concat(repositoryService.BaseUri, "/GetAllPeople"));
    foreach (var person in repositoryService.Execute<RepositoryService.Person>(uriRequest))
    {
        System.Console.WriteLine("Name: " + person.Name + ", Addresses: " + person.Addresses.Count.ToString());
    }

    System.Console.ReadKey();
}

有任何想法嗎？

Answer 1

導航屬性默認情況下不展開。 而且服務器上沒有辦法強迫它們擴展。 客戶端可以通過請求/ People？$ expand = Addresses輕松地做到這一點。