更新时间:2023-01-17 19:11:35
更新
已修复在变更集中
Fixed in change set 70120ce, which will be included in Json.NET 8.0.2.
原始答案
已确认-这似乎是回归.考虑以下简单的测试类:
Confirmed - this appears to be a regression. Consider the following simple test class:
internal class HasByteArray
{
public byte[] EncryptedPassword { get; set; }
}
现在,如果我尝试使用TypeNameHandling.Objects
往返课程:
Now if I try to round-trip the class with TypeNameHandling.Objects
:
private static void TestSimple()
{
var test = new HasByteArray { EncryptedPassword = Convert.FromBase64String("cGFzc3dvcmQ=") };
try
{
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");
}
我收到以下异常:
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()
在Json 7.0中不会发生该异常.您应该报告问题.
The exception does not occur in Json 7.0. You should report an issue.
同时,您可以使用以下转换器解决此问题:
In the meantime, you can use the following converter to work around the problem:
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();
}
}
具有设置
var jsonSerializerSettings = new JsonSerializerSettings
{
TypeNameHandling = TypeNameHandling.Objects,
TypeNameAssemblyFormat = FormatterAssemblyStyle.Simple,
Converters = new [] { new ByteArrayConverter() },
};