与EF4循环引用 [英] Circular reference with EF4

问题描述

我想带着孩子到jQuery的JSON AJAX功能返回实体框架4的对象，但我得到一个循环引用错误 - 总之我的方法是这样的

I am trying to return an Entity Framework 4 object with children to an jQuery JSON AJAX function but I get a circular reference error - in short my method looks like this

[WebMethod]
public static JSONObject Get()
{
  WebHelper.JSONObject lJSONObject = new WebHelper.JSONObject();

  lJSONObject.Object =  Repository.Parent.Include("Child.Child").FirstOrDefault();

  return lJSONObject;
}

如果我不包括儿童的功能工作正常，但有孩子的循环引用发生。任何想法我能做些什么来解决这个问题？

if I do not include children the functions works fine, but with children the circular reference occurs. Any ideas what I can do to fix this?

推荐答案

你必须返回一个JSONObject？如果没有，你可以尝试使用 Json.NET ，这将妥善处理循环引用：

Do you have to return a JSONObject? If not, you can try using Json.NET, which will handle circular references properly:

var settings = new JsonSerializerSettings
                   {
                       ReferenceLoopHandling = ReferenceLoopHandling.Ignore
                   };

JsonConvert.SerializeObject(object, Formatting.Indented, settings);

我的猜测是，的JSONObject 很简单，就是将序列化实体，并把它的响应流，这是很简单的手工做的包装。

My guess is that the JsonObject is simply a wrapper that will serialize the entity and put it on the response stream, which is simple enough to do manually.

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