检测类型JSON.NET错误自参考循环 [英] JSON.NET Error Self referencing loop detected for type

问题描述

我试图序列被自动从实体数据模型的.edmx生成的POCO类，当我用

I tried to serialize POCO class that was automatically generated from Entity Data Model .edmx and when I used

JsonConvert.SerializeObject 

我得到了以下错误：

I got the following error:

类型System.Data.Entity的检测错误自参考循环。

Error Self referencing loop detected for type System.data.entity occurs .

我该如何解决这个问题？

How do I solve this problem?

推荐答案

使用JsonSerializerSettings

如果遇到一个参考循环
• ReferenceLoopHandling.Error （默认值）会报错。的这就是为什么你会得到一个异常。的


• ReferenceLoopHandling.Serialize 如果对象嵌套，但非常有用不下去。

如果是自身的子对象
• ReferenceLoopHandling.Ignore 将不序列化一个对象。

• ReferenceLoopHandling.Error (default) will error if a reference loop is encountered. This is why you get an exception.
• ReferenceLoopHandling.Serialize is useful if objects are nested but not indefinitely.
• ReferenceLoopHandling.Ignore will not serialize an object if it is a child object of itself.

例如：

JsonConvert.SerializeObject(YourPOCOHere, Formatting.Indented, 
new JsonSerializerSettings { 
        ReferenceLoopHandling = ReferenceLoopHandling.Serialize
});

你应该有序列化，无限嵌套你可以使用一个对象<一个href=\"http://james.newtonking.com/json/help/index.html?topic=html/$p$pserveObjectReferences.htm\">$p$pserveObjectReferences避免StackOverflowException

Should you have to serialize an object that is nested indefinitely you can use PreserveObjectReferences to avoid a StackOverflowException.

例如：

JsonConvert.SerializeObject(YourPOCOHere, Formatting.Indented, 
new JsonSerializerSettings { 
        PreserveReferencesHandling = PreserveReferencesHandling.Objects
});

挑选什么使你感觉被序列化对象。

Pick what makes sense for the object you are serializing.

http://james.newtonking.com/json/help/

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