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如何使用newtonsoft json.net反序列化接口

json.net serialization json .net c#

0

Bruno · 技术社区 · 7 年前

我有这样的等级制度:

public class ProxyBotsSnapshotLogEntryDetails : IBotsSnapshotLogEntryDetails
{
    public ICollection<IBotSnapshot> Snapshots { get; set; }
}
public class ProxyBotSnapshot : IBotSnapshot
{
    public string Name { get; set; }
    public ICollection<IBotSnapshotItem> States { get; set; }
}

public class ProxyBotSnapshotItem : IBotSnapshotItem
{
    public int Count { get; set; }
    public IrcBotChannelStateEnum State { get; set; }
}

以及相应的接口

public interface IBotsSnapshotLogEntryDetails
{
    ICollection<IBotSnapshot> Snapshots { get; set; }
}

public interface IBotSnapshot
{
    string Name { get; set; }
    ICollection<IBotSnapshotItem> States { get; set; }
}

public interface IBotSnapshotItem
{
    int Count { get; set; }
    IrcBotChannelStateEnum State { get; set; }
}

我想从json反序列化:

var test = JsonConvert.DeserializeObject<ProxyBotsSnapshotLogEntryDetails>(entry.DetailsSerialized);

但是我得到一个错误,说newtonsoft不能转换接口。

我发现这篇很有前途的文章:

https://www.c-sharpcorner.com/UploadFile/20c06b/deserializing-interface-properties-with-json-net/

但不知道如何使用属性,因为在我的例子中,属性是一个接口列表。

1 回复 | 直到 7 年前

1

Bruno 7 年前

知道了!

本文中提供的转换器工作得非常好,我只是缺少在集合属性上使用它的语法。下面是带有转换器和工作属性的代码:

// From the article
public class ConcreteConverter<T> : JsonConverter
{
    public override bool CanConvert(Type objectType) => true;

    public override object ReadJson(JsonReader reader,
     Type objectType, object existingValue, JsonSerializer serializer)
    {
        return serializer.Deserialize<T>(reader);
    }

    public override void WriteJson(JsonWriter writer,
        object value, JsonSerializer serializer)
    {
        serializer.Serialize(writer, value);
    }
}

public class ProxyBotsSnapshotLogEntryDetails : IBotsSnapshotLogEntryDetails
{
    [JsonProperty(ItemConverterType = typeof(ConcreteConverter<ProxyBotSnapshot>))]
    public ICollection<IBotSnapshot> Snapshots { get; set; }
}
public class ProxyBotSnapshot : IBotSnapshot
{
    public string Name { get; set; }

    [JsonProperty(ItemConverterType = typeof(ConcreteConverter<ProxyBotSnapshotItem>))]
    public ICollection<IBotSnapshotItem> States { get; set; }
}

public class ProxyBotSnapshotItem : IBotSnapshotItem
{
    public int Count { get; set; }
    public IrcBotChannelStateEnum State { get; set; }
}