Question

我的桌面wpf应用程序与mvc 4 web api通信。我正在尝试读取所有数据库条目。这是一个简单的界面：

public interface IEventRepository
{
    IEnumerable<Event> GetAll();
}

这是存储库：

public class EventRepository : IEventRepository
{
    private List<Event> events = new List<Event>();
    public EventRepository()
    {
        HeronEntities context = new HeronEntities();
        events = context.Events.ToList();
    }

    public IEnumerable<Event> GetAll()
    {
        return events;
    }
 }

这是控制器：

 public class EventController : ApiController
{
    static readonly IEventRepository repository = new EventRepository();

    public IEnumerable<Event> GetAllEvents()
    {
        return repository.GetAll();
    }
}

事件类如下所示：

public partial class Event
{
    public Event()
    {
        this.Comments = new HashSet<Comment>();
        this.Rates = new HashSet<Rate>();
        this.RawDates = new HashSet<RawDate>();
    }

    public int ID { get; set; }
    public string Title { get; set; }
    public string Summary { get; set; }
    public string SiteURL { get; set; }
    public string ContactEmail { get; set; }
    public string LogoURL { get; set; }
    public int EventType_ID { get; set; }
    public Nullable<int> Location_ID { get; set; }
    public Nullable<System.DateTime> BegginingDate { get; set; }
    public string nTrain { get; set; }
    public string Content { get; set; }

    public virtual ICollection<Comment> Comments { get; set; }
    public virtual Conference Conference { get; set; }
    public virtual ICollection<Rate> Rates { get; set; }
    public virtual ICollection<RawDate> RawDates { get; set; }
    public virtual EventType EventType { get; set; }
    public virtual Location Location { get; set; }
}

当我尝试访问控制器时，出现上述failed to serialize the response body for content type错误。 Event类序列化存在一些问题。我使用完全相同的代码与包含基元类型的类，它完美地工作。克服这种序列化问题的最佳方法是什么？

Answer 1

我已禁用延迟加载和代理类生成。这解决了这个问题。

public EventRepository()
    {
        HeronEntities context = new HeronEntities();
        context.Configuration.LazyLoadingEnabled = false;
        context.Configuration.ProxyCreationEnabled = false;
        events = context.Events.ToList();
    }

考虑使用DataContractResolver序列化错误

1 个答案: