问题描述
我想使用Json.net反序列化包含接口对象的篮子.这个...
Using Json.net, I want to deserialize a basket containing interface objects.This...
{
"Owner": "John",
"Fruit": [ <an apple object>, <a pear>, etc... ]
}
...应该进入这个...
... should go into this...
class Basket
{
string Owner;
List<iFruit> Fruit; //contains instances of Apple, Pear,...
}
无法实例化接口，因此需要转换为具体对象.我发现了使用JsonConverter创建具体的Apple和Pear实例的示例.但是，列表总是直接用以下行创建:
Interfaces cannot be instantiated, so a conversion to concrete objects is needed. I found examples using a JsonConverter to create concrete Apple and Pear instances. But the list is always created directly with a line like:
List<iFruit> fruit = JsonConvert.DeserializeObject<List<iFruit>>(json, new FruitConverter());
如何反序列化整个购物篮，其中JsonConverter仅用于水果列表中的对象?
How do I deserialize a whole Basket, where the JsonConverter is used only for the objects in the fruit list?
推荐答案
问题的解决方法确实很简单.
The solution to the problem is simple, really.
[JsonConverter (typeof(IFruitConverter))]
public interface iFruit
{
}
作为旁注，转换器基于此答案.我在返回false的转换器中添加了CanWrite覆盖，因此在序列化期间它将被忽略，仅在反序列化期间起作用.感谢@Blorgbeard！
As a sidenote, the converter is based on this answer.I added a CanWrite override to the converter that returns false, so that it will be ignored during serialization and only come into play during deserialisation.Thanks to @Blorgbeard!
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