protobuf -net不知道如何序列化類型爲= object的datamember

Question

我們將以下類作爲使用WCF在線上運行的ADO.NET提供程序的一部分。

[KnownType(typeof(AdoServiceCommandExecutionScalarResult))] 
[DataContract(Namespace = Namespaces.SoafXmlNamespace)] 
public class AdoServiceCommandExecutionResult 
{ 
} 
[DataContract(Namespace = Namespaces.SoafXmlNamespace)] 
public class AdoServiceCommandExecutionScalarResult : AdoServiceCommandExecutionResult 
{ 
    [DataMember] 
    public object Result { get; set; } 

    public override string ToString() 
    { 
     return new XDocument(new XElement(GetType().Name, new XAttribute("Result", Result))).ToString(); 
    } 
} 

我們正在嘗試使用protobuf網系列化但有拋出該類型的對象不能被解析異常。

異常消息：

No serializer defined for type: System.Object 

堆棧跟蹤：

ProtoBuf.Meta.ValueMember.BuildSerializer() 
ProtoBuf.Meta.ValueMember.get_Serializer() 
ProtoBuf.Meta.MetaType.BuildSerializer() 
ProtoBuf.Meta.MetaType.get_Serializer() 
ProtoBuf.Meta.MetaType.ProtoBuf.Serializers.ISerializerProxy.get_Serializer() 
ProtoBuf.Serializers.SubItemSerializer.ProtoBuf.Serializers.IProtoTypeSerializer.HasCallbacks(CallbackType callbackType) 
ProtoBuf.Serializers.TypeSerializer.HasCallbacks(CallbackType callbackType) 
ProtoBuf.Serializers.TypeSerializer.ProtoBuf.Serializers.IProtoSerializer.EmitWrite(CompilerContext ctx, Local valueFrom) 
ProtoBuf.Compiler.CompilerContext.WriteNullCheckedTail(Type type, IProtoSerializer tail, Local valueFrom) 
ProtoBuf.Compiler.CompilerContext.BuildSerializer(IProtoSerializer head, TypeModel model) 
ProtoBuf.Serializers.CompiledSerializer..ctor(IProtoTypeSerializer head, TypeModel model) 
ProtoBuf.Meta.MetaType.get_Serializer() 
ProtoBuf.Meta.RuntimeTypeModel.Serialize(Int32 key, Object value, ProtoWriter dest) 
ProtoBuf.Meta.TypeModel.TrySerializeAuxiliaryType(ProtoWriter writer, Type type, DataFormat format, Int32 tag, Object value, Boolean isInsideList) 
ProtoBuf.Meta.TypeModel.TrySerializeAuxiliaryType(ProtoWriter writer, Type type, DataFormat format, Int32 tag, Object value, Boolean isInsideList) 
ProtoBuf.Meta.TypeModel.SerializeCore(ProtoWriter writer, Object value) 
ProtoBuf.Meta.TypeModel.Serialize(Stream dest, Object value, SerializationContext context) 
ProtoBuf.ServiceModel.XmlProtoSerializer.WriteObjectContent(XmlDictionaryWriter writer, Object graph) 
System.Runtime.Serialization.XmlObjectSerializer.InternalWriteObject(XmlWriterDelegator writer, Object graph) 
System.Runtime.Serialization.XmlObjectSerializer.WriteObjectHandleExceptions(XmlWriterDelegator writer, Object graph, DataContractResolver dataContractResolver) 
System.Runtime.Serialization.XmlObjectSerializer.WriteObject(XmlDictionaryWriter writer, Object graph) 
System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.SerializeParameterPart(XmlDictionaryWriter writer, PartInfo part, Object graph) 
System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.SerializeParameter(XmlDictionaryWriter writer, PartInfo part, Object graph) 
System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.SerializeBody(XmlDictionaryWriter writer, MessageVersion version, String action, MessageDescription messageDescription, Object returnValue, Object[] parameters, Boolean isRequest) 
System.ServiceModel.Dispatcher.OperationFormatter.OperationFormatterMessage.OperationFormatterBodyWriter.OnWriteBodyContents(XmlDictionaryWriter writer) 
System.ServiceModel.Channels.Message.OnWriteMessage(XmlDictionaryWriter writer) 
System.ServiceModel.Channels.BufferedMessageWriter.WriteMessage(Message message, BufferManager bufferManager, Int32 initialOffset, Int32 maxSizeQuota) 
System.ServiceModel.Channels.TextMessageEncoderFactory.TextMessageEncoder.WriteMessage(Message message, Int32 maxMessageSize, BufferManager bufferManager, Int32 messageOffset) 
System.ServiceModel.Channels.HttpOutput.SerializeBufferedMessage(Message message) 
System.ServiceModel.Channels.HttpOutput.Send(TimeSpan timeout) 
System.ServiceModel.Channels.HttpPipeline.EmptyHttpPipeline.SendReplyCore(Message message, TimeSpan timeout) 
System.ServiceModel.Channels.HttpRequestContext.OnReply(Message message, TimeSpan timeout) 
System.ServiceModel.Channels.RequestContextBase.Reply(Message message, TimeSpan timeout) 
System.ServiceModel.Channels.RequestContextBase.Reply(Message message, TimeSpan timeout) 
System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.Reply(MessageRpc& rpc) 

是否有可能解決這個問題？

編輯： 我們有一個自定義的例程，基本上（簡化爲簡潔）。

type.GetAttributes<KnownTypeAttribute>().Select(a => a.Type).Distinct().ForEach(t => AddKnownTypeHierarchy(t)); 

public static void AddKnownTypeHierarchy(Type type) 
{ 

    ProtoBuf.Meta.MetaType metaType = RuntimeTypeModel.Default.Add(type, true); 
    ... 
    var fieldNumber = derivedType.MetadataToken; 
    metaType.AddSubType(fieldNumber, derivedType); 
    ... 
    var memberType = member.MemberInfo.As<PropertyInfo>().IfNotNull(p => p.PropertyType) ?? member.As<FieldInfo>().IfNotNull(f => f.FieldType); 
    var field = metaType.AddField(member.Order, member.Name); 
    if (memberType == typeof (object) || memberType.EqualsGenericTypeFor(typeof (IEnumerable<>))) field.DynamicType = true; 
    ... 
} 

我們添加邏輯，如果一個對象被遇到，它應該動態地處理。 這種做法導致了以下異常：

Dynamic type is not a contract-type: Int32 

是否有可能增加對治療對象的動態，而不是支持？

Answer 1

Protobuf需要特定類型的序列化/反序列化。你需要給它一些特定的東西而不是Object。