时间戳

首页 > 解决方案 > MessagePack 反序列化从 Dictionary<,> 继承的类中的异常

c# - MessagePack 反序列化从 Dictionary<,> 继承的类中的异常

问题描述

嗨，我有一个像这样的课程：

 public class Event : Dictionary<AttributeType, object>

AttributeType 是枚举

反序列化会抛出异常

var @event = new Event { { AttributeType.EventId, Guid.NewGuid() } };
MessagePackSerializer.Deserialize<Event(MessagePackSerializer.Serialize(@event));

异常消息是：

System.ArgumentException: 'The value "21" is not of type "BRCo.Core.Common.Enums.AttributeType" and cannot be used in this generic collection.'

但是当我使用这段代码时就可以了

var @event = new Event { { AttributeType.EventId, Guid.NewGuid() } };
MessagePackSerializer.Deserialize<Dictionary<AttributeType, object>>(MessagePackSerializer.Serialize(@event));

有什么帮助吗？

谢谢

标签： c#msgpack

解决方案

感谢neuecc这里是答案

// create custom dictionary inherited formatter.
public class EventFormatter :DictionaryFormatterBase<AttributeType,object, Event>
{
   protected override Event Create(int count)
   {
       return new Event();
   }

   protected override void Add(Event collection, int index, AttributeType key, object value)
   {
       collection.Add(key, value);
   }
}

// and register it.
MessagePack.Resolvers.CompositeResolver.RegisterAndSetAsDefault(
new[] { new EventFormatter() },
new[] { StandardResolver.Instance });

推荐阅读