Question

我需要在数据协定中传递System.Net.NetworkInformation.PhysicalAddress（.NET Framework内置类型）。由于这种类型不能自行序列化，我从中派生了我的助手类：

[DataContract]
public class PhysicalAddressSerializable : PhysicalAddress
{
    public PhysicalAddressSerializable()
        : base(new byte[] {0,0,0,0,0,0})
    { }
    public PhysicalAddressSerializable(byte[] address) 
        : base(address)
    { }

    [DataMember]
    public string AddressString { get { return ToString(); } set { Parse(value); } }
}

完美地序列化为XML;但是，当我尝试将其传递给服务调用时，我收到了System.Runtime.Serialization.InvalidDataContractException：

类型'System.Net.NetworkInformation.PhysicalAddress'无法序列化。请考虑使用DataContractAttribute属性对其进行标记，并使用DataMemberAttribute属性标记要序列化的所有成员。如果类型是集合，请考虑使用CollectionDataContractAttribute对其进行标记。有关其他受支持的类型，请参阅Microsoft .NET Framework文档。

堆栈追踪：

Server stack trace: 
   at System.Runtime.Serialization.DataContract.DataContractCriticalHelper.ThrowInvalidDataContractException(String message, Type type)
   at System.Runtime.Serialization.DataContract.DataContractCriticalHelper.CreateDataContract(Int32 id, RuntimeTypeHandle typeHandle, Type type)
   at System.Runtime.Serialization.DataContract.GetDataContract(Int32 id, RuntimeTypeHandle typeHandle, SerializationMode mode)
   at System.Runtime.Serialization.ClassDataContract.ClassDataContractCriticalHelper..ctor(Type type)
   at System.Runtime.Serialization.DataContract.DataContractCriticalHelper.CreateDataContract(Int32 id, RuntimeTypeHandle typeHandle, Type type)
   at System.Runtime.Serialization.DataContract.GetDataContract(Int32 id, RuntimeTypeHandle typeHandle, SerializationMode mode)
   at System.Runtime.Serialization.XmlObjectSerializerWriteContext.InternalSerialize(XmlWriterDelegator xmlWriter, Object obj, Boolean isDeclaredType, Boolean writeXsiType, Int32 declaredTypeID, RuntimeTypeHandle declaredTypeHandle)
   at System.Runtime.Serialization.XmlObjectSerializerWriteContext.InternalSerializeReference(XmlWriterDelegator xmlWriter, Object obj, Boolean isDeclaredType, Boolean writeXsiType, Int32 declaredTypeID, RuntimeTypeHandle declaredTypeHandle)
   at WriteUnitInfoToXml(XmlWriterDelegator , Object , XmlObjectSerializerWriteContext , ClassDataContract )
   at System.Runtime.Serialization.ClassDataContract.WriteXmlValue(XmlWriterDelegator xmlWriter, Object obj, XmlObjectSerializerWriteContext context)
   at System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeWithoutXsiType(DataContract dataContract, XmlWriterDelegator xmlWriter, Object obj, RuntimeTypeHandle declaredTypeHandle)
   at System.Runtime.Serialization.DataContractSerializer.InternalWriteObjectContent(XmlWriterDelegator writer, Object graph, DataContractResolver dataContractResolver)
   at System.Runtime.Serialization.DataContractSerializer.InternalWriteObject(XmlWriterDelegator writer, Object graph, DataContractResolver dataContractResolver)
   at System.Runtime.Serialization.XmlObjectSerializer.WriteObjectHandleExceptions(XmlWriterDelegator writer, Object graph, DataContractResolver dataContractResolver)
   at System.Runtime.Serialization.XmlObjectSerializer.WriteObject(XmlDictionaryWriter writer, Object graph)
   at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.SerializeParameterPart(XmlDictionaryWriter writer, PartInfo part, Object graph)
   at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.SerializeParameter(XmlDictionaryWriter writer, PartInfo part, Object graph)
   at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.SerializeParameters(XmlDictionaryWriter writer, PartInfo[] parts, Object[] parameters)
   at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.SerializeBody(XmlDictionaryWriter writer, MessageVersion version, String action, MessageDescription messageDescription, Object returnValue, Object[] parameters, Boolean isRequest)
   at System.ServiceModel.Dispatcher.OperationFormatter.OperationFormatterMessage.OperationFormatterBodyWriter.OnWriteBodyContents(XmlDictionaryWriter writer)
   at System.ServiceModel.Channels.Message.OnWriteMessage(XmlDictionaryWriter writer)
   at System.ServiceModel.Channels.BufferedMessageWriter.WriteMessage(Message message, BufferManager bufferManager, Int32 initialOffset, Int32 maxSizeQuota)
   at System.ServiceModel.Channels.BinaryMessageEncoderFactory.BinaryMessageEncoder.WriteMessage(Message message, Int32 maxMessageSize, BufferManager bufferManager, Int32 messageOffset)
   at System.ServiceModel.Channels.FramingDuplexSessionChannel.EncodeMessage(Message message)
   at System.ServiceModel.Channels.FramingDuplexSessionChannel.OnSendCore(Message message, TimeSpan timeout)
   at System.ServiceModel.Channels.TransportDuplexSessionChannel.OnSend(Message message, TimeSpan timeout)
   at System.ServiceModel.Channels.OutputChannel.Send(Message message, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)

Answer 1

根据错误消息，它对基类PhysicalAddress感到不满意。所以：

不要使用基类 - 使用不需要它的简单DTO，或者：
标记序列化的基类

特别是：

[DataContract, KnownType(PhysicalAddressSerializable)]
public class PhysicalAddress {
    [DataMember(...)]
    public SomeType Foo {get;set;} // whatever
}

然而！从名称PhysicalAddressSerializable开始，听起来好像你不希望将基类作为可序列化的。你可以尝试使用：

[XmlSerializerFormat]
public class PhysicalAddressSerializable : PhysicalAddress {...}

使用WCF DataContract的InvalidDataContractException（“类型无法序列化”）错误

1 个答案: