c# - JSON.NET 将实现 IDictionary 的对象反序列化为字典，如何强制常规类序列化？

Question

假设我定义了一个 interface :

public interface IExtensibleObject : IDictionary<string, object>
{
    // Some members here, but it doesn't matter for this question
}

我设计了一个实现整个接口(interface)的类:

public class Customer : IExtensibleObject
{
     public Guid Id { get; set; }

     // IExtensibleObject implemented members
}

当我尝试反序列化 JSON string 时至Customer ，JSON.NET将访问IDictionary<TKey, TValue>索引器设置Id属性(即 instance["Id"] = value ):

Customer customer = JsonConvert.DeserializeObject<Customer>(@"{""Id"":""bcf66a92-00ea-4124-afa7-a6c200ae5886""}");

是否有某种内置方法可以避免整个行为？。我需要将整个对象反序列化为常规对象，即使它实现 IDictionary<TKey, TValue> .

Answer 1

您可以使用自定义契约(Contract)解析器来完成此操作。默认合约解析器检查类是否实现了 IDictionary，如果是，则对其进行序列化\反序列化。您可以更改它:

class CustomResolver : DefaultContractResolver {
    protected override JsonContract CreateContract(Type objectType) {
        // if type implements your interface - serialize it as object
        if (typeof(IExtensibleObject).IsAssignableFrom(objectType)) {
            return base.CreateObjectContract(objectType);
        }

        return base.CreateContract(objectType);
    }
}

然后就是:

 var settings = new JsonSerializerSettings(); // or change default settings
 settings.ContractResolver = new CustomResolver();                        
 Customer customer = JsonConvert.DeserializeObject<Customer>(@"{""Id"":""bcf66a92-00ea-4124-afa7-a6c200ae5886""}", settings);