参见英文答案 > Json and Circular Reference Exception9个
所以我有这笔交易

楷模

@H_301_5@public class News { public News() { this.Created = DateTime.Now; } public int Id { get; set; } public string Title { get; set; } public string Preamble { get; set; } public string Body { get; set; } public DateTime Created { get; set; } public int UserId { get; set; } public virtual User User { get; set; } public int CategoryId { get; set; } public int ImageId { get; set; } public virtual Image Image { get; set; } public virtual Category Category { get; set; } } public class Image { public int Id { get; set; } public string Name { get; set; } public string ImageUrl { get; set; } public Byte[] ImageData { get; set; } public string ImageMimeType { get; set; } } public class Category { public int Id { get; set; } public string Name { get; set; } }

….以下模型(这些模型连接到EfDbContext)连接到以下存储库…

接口/库

@H_301_5@public class NewsRepository : INewsRepository { EfDbContext context = new EfDbContext(); public IQueryable<News> All { get { return context.News; } } public IQueryable<News> AllIncluding(params Expression<Func<News,object>>[] includeProperties) { IQueryable<News> query = context.News; foreach (var includeProperty in includeProperties) { query = query.Include(includeProperty); } return query; } public News Find(int id) { return context.News.Find(id); } public void InsertOrUpdate(News news) { if (news.Id == default(int)) { // New entity context.News.Add(news); } else { // Existing entity context.Entry(news).State = EntityState.Modified; } } public void Delete(int id) { var news = context.News.Find(id); context.News.Remove(news); } public void Save() { context.SaveChanges(); } } public interface INewsRepository { IQueryable<News> All { get; } IQueryable<News> AllIncluding(params Expression<Func<News,object>>[] includeProperties); News Find(int id); void InsertOrUpdate(News news); void Delete(int id); void Save(); }

在我的HomeController()中,我得到了一个JsonResult metod,我想返回上下文.
这是方法

Json请求

@H_301_5@[HttpGet] public JsonResult GetNews() { var p = newsRepository.AllIncluding(news => news.Category,news => news.Image); return Json(p,JsonRequestBehavior.AllowGet); }

我收到以下错误：

序列化“System.Data.Entity.DynamicProxies.News_96C0B16EC4AC46070505EEC7537EF3C68EE6CE5FC3C7D8EBB793B2CF9BD391B3”类型的对象时检测到循环引用.

我猜这与懒加载的东西有关(Iam目前正在学习C#)我发现这篇文章关于这个……

http://hellowebapps.com/2010-09-26/producing-json-from-entity-framework-4-0-generated-classes/

但我没有得到它的工作…我能读到的关于代码的是他们试图深入搜索通过对象…更多我无法弄清楚.

我的问题是如何传递lazyLoading对象？进入json / serializer
或者它不存在,任何关于我如何进行的想法？