反序列化JSON子类

我有3类：反序列化JSON子类

class Person { 
    public bool IsFemale { get; set; } 
} 

class Female : Person { 
    public string FemaleSpecificProperty { get; set; } 
} 

class Male: Person { 
    public string MaleSpecificProperty { get; set; } 
}

我怎样才能给反序列化JSON字符串转换成特定情况下基于Person.IsFemale属性的值（Female或Male）？（前期我不知道哪种确切类型已被使用，而且该属性是唯一的迹象）

我看着雇用CustomCreationConverter<T>，但无法弄清楚如何使它在这里工作。

来源

2013-07-06 Maxim

看看http://stackoverflow.com/questions/8030538/how-to-implement-custom-jsonconverter-in-json-net-to-deserialize-a-list-of-base – alex

这是您的人类转换器。它得到IsFemale字段值，并在此基础上创建Female或Male人，这是由串行填充：

public class PersonConverter : JsonConverter 
{ 
    public override bool CanConvert(Type objectType) 
    { 
     return typeof(Person).IsAssignableFrom(objectType); 
    } 

    public override object ReadJson(JsonReader reader, Type objectType, 
     object existingValue, JsonSerializer serializer) 
    { 
     JObject jObject = JObject.Load(reader); 
     var isFemale = (bool)jObject["IsFemale"]; 
     Person target = isFemale ? (Person)new Female() : new Male(); 
     serializer.Populate(jObject.CreateReader(), target); 
     return target; 
    } 

    public override void WriteJson(JsonWriter writer, object value, 
     JsonSerializer serializer) 
    { 
     throw new NotImplementedException(); 
    } 
}

用法：

List<Person> people = new List<Person> 
{ 
    new Male { IsFemale = false, MaleSpecificProperty = "Y" }, 
    new Male { IsFemale = false, MaleSpecificProperty = "Y" }, 
    new Female { IsFemale = true, FemaleSpecificProperty = "X" } 
}; 

string json = JsonConvert.SerializeObject(people); 
var result = 
    JsonConvert.DeserializeObject<List<Person>>(json, new PersonConverter());

还承担问题Alex建议看看：How to implement custom JsonConverter

来源

2013-07-06 08:21:19

反序列化JSON子类

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