问 无法使用Json.NET 8.0.1反序列化具有字节数组属性的对象

更新

变更中的 固定 设置了 70120 ，它将包含在Json.NET 8.0.2中。

原始答案

确认-这似乎是一个倒退。考虑以下简单的测试类：

internal class HasByteArray
    public byte[] EncryptedPassword { get; set; }
}

现在，如果我试着用 TypeNameHandling.Objects 往返全班

    private static void TestSimple()
        var test = new HasByteArray { EncryptedPassword = Convert.FromBase64String("cGFzc3dvcmQ=") };
            TestRoundTrip(test);
        catch (Exception ex)
            Debug.WriteLine(ex);
    private static void TestRoundTrip<T>(T item)
        var jsonSerializerSettings = new JsonSerializerSettings
            TypeNameHandling = TypeNameHandling.Objects,
            TypeNameAssemblyFormat = FormatterAssemblyStyle.Simple
        TestRoundTrip<T>(item, jsonSerializerSettings);
    private static void TestRoundTrip<T>(T item, JsonSerializerSettings jsonSerializerSettings)
        var json = JsonConvert.SerializeObject(item, Formatting.Indented, jsonSerializerSettings);
        Debug.WriteLine(json);
        var item2 = JsonConvert.DeserializeObject<T>(json, jsonSerializerSettings);
        var json2 = JsonConvert.SerializeObject(item2, Formatting.Indented, jsonSerializerSettings);
        Debug.WriteLine(json2);
        if (!JToken.DeepEquals(JToken.Parse(json), JToken.Parse(json2)))
            throw new InvalidOperationException("Round Trip Failed");
    }

我得到以下例外：

Newtonsoft.Json.JsonSerializationException: Additional text found in JSON string after finishing deserializing object.
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent) in C:\Development\Releases\Json\Working\Newtonsoft.Json\Working-Signed\Src\Newtonsoft.Json\Serialization\JsonSerializerInternalReader.cs:line 196
   at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType) in C:\Development\Releases\Json\Working\Newtonsoft.Json\Working-Signed\Src\Newtonsoft.Json\JsonSerializer.cs:line 823
   at Newtonsoft.Json.JsonSerializer.Deserialize(JsonReader reader, Type objectType) in C:\Development\Releases\Json\Working\Newtonsoft.Json\Working-Signed\Src\Newtonsoft.Json\JsonSerializer.cs:line 802
   at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings) in C:\Development\Releases\Json\Working\Newtonsoft.Json\Working-Signed\Src\Newtonsoft.Json\JsonConvert.cs:line 863
   at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSerializerSettings settings) in C:\Development\Releases\Json\Working\Newtonsoft.Json\Working-Signed\Src\Newtonsoft.Json\JsonConvert.cs:line 820
   at Question34654184.TestClass.TestRoundTrip[T](T item, JsonSerializerSettings jsonSerializerSettings)
   at Question34654184.TestClass.TestRoundTrip[T](T item)
   at Question34654184.TestClass.TestSimple()

Json7.0中没有出现异常。你应该 报告问题 。

同时，您可以使用以下转换器来解决问题：

public class ByteArrayConverter : JsonConverter
    public override bool CanConvert(Type objectType)
        return objectType == typeof(byte[]);
    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
        if (reader.TokenType == JsonToken.Null)
            return null;
        var token = JToken.Load(reader);
        if (token == null)
            return null;
        switch (token.Type)
            case JTokenType.Null:
                return null;
            case JTokenType.String:
                return Convert.FromBase64String((string)token);
            case JTokenType.Object:
                    var value = (string)token["$value"];
                    return value == null ? null : Convert.FromBase64String(value);
            default:
                throw new JsonSerializationException("Unknown byte array format");
    public override bool CanWrite { get { return false; } } // Use the default implementation for serialization, which is not broken.
    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
        throw new NotImplementedException();