Question

我有一个多项目解决方案。 One Project提供了一个包含多个类的DLL。

其中一个类是ExecSQLWorker。另外两个类继承自CopyWorker和class ExecSQLWorker : WorkerTemplate {}; class CopyWorker: WorkerTemplate {};

 public interface IPQWService
 {
     [OperationContract]
     void EnqueueWorker(WorkerTemplate[] worker);
 }

在我的WCF服务中，我的界面就像那样：

WorkerTemplate[]

现在，在我的客户端应用程序中，ExecSQLWorker由CopyWorker和EnqueueWorker(worker)个对象组成。当我现在尝试调用Unhandled Exception: System.ServiceModel.CommunicationException: There was an error while trying to serialize parameter http://tempuri.org/:worker. The InnerException message was 'Type 'DV_BII30.ExecSQLWorker' with data contract name 'ExecSQLWorker:http://schemas.datacontract.org/2004/07/DV_BII30' is not expected. Consider using a DataContractResolver if you are using DataContractSerializer or add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to the serializer.'. Please see InnerException for more details. ---> System.Runtime.Serialization.SerializationException: Type 'DV_BII30.ExecSQLWorker' with data contract name 'ExecSQLWorker:http://schemas.datacontract.org/2004/07/DV_BII30' is not expected. Consider using a DataContractResolver if you are using DataContractSerializer or add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to the serializer. at System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeAndVerifyType(DataContract dataContract, XmlWriterDelegator xmlWriter, Object obj, Boolean verifyKnownType, RuntimeTypeHandle declaredTypeHandle, Type declaredType) at System.Runtime.Serialization.XmlObjectSerializerWriteContext.SerializeWithXsiType(XmlWriterDelegator xmlWriter, Object obj, RuntimeTypeHandle objectTypeHandle, Type objectType, Int32 declaredTypeID, RuntimeTypeHandle declaredTypeHandle, Type declaredType) at System.Runtime.Serialization.XmlObjectSerializerWriteContext.InternalSerialize(XmlWriterDelegator xmlWriter, Object obj, Boolean isDeclaredType, Boolean writeXsiType, Int32 declaredTypeID, RuntimeTypeHandle declaredTypeHandle) at WriteArrayOfWorkerTemplateToXml(XmlWriterDelegator , Object , XmlObjectSerializerWriteContext , CollectionDataContract ) at System.Runtime.Serialization.CollectionDataContract.WriteXmlValue(XmlWriterDelegator xmlWriter, Object obj, XmlObjectSerializerWriteContext context) at System.Runtime.Serialization.XmlObjectSerializerWriteContext.WriteDataContractValue(DataContract dataContract, XmlWriterDelegator xmlWriter, Object obj, RuntimeTypeHandle declaredTypeHandle) 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) --- End of inner exception stack trace --- Server stack trace: 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.SerializeBodyContents(XmlDictionaryWriter writer, MessageVersion version, Object[] parameters, Object returnValue, Boolean isRequest) at System.ServiceModel.Dispatcher.OperationFormatter.OperationFormatterMessage.OperationFormatterBodyWriter.OnWriteBodyContents(XmlDictionaryWriter writer) at System.ServiceModel.Channels.BodyWriterMessage.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.TextMessageEncoderFactory.TextMessageEncoder.WriteMessage(Message message, Int32 maxMessageSize, BufferManager bufferManager, Int32 messageOffset) at System.ServiceModel.Channels.HttpOutput.SerializeBufferedMessage(Message message, Boolean shouldRecycleBuffer) at System.ServiceModel.Channels.HttpOutput.Send(TimeSpan timeout) at System.ServiceModel.Channels.HttpChannelFactory`1.HttpRequestChannel.HttpChannelRequest.SendRequest(Message message, TimeSpan timeout) at System.ServiceModel.Channels.RequestChannel.Request(Message message, TimeSpan timeout) at System.ServiceModel.Dispatcher.RequestChannelBinder.Request(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) at DV_BII30.ServiceReference1.IPQWService.EnqueueWorker(WorkerTemplate[] worker) at DV_BII30.Program.Main(String[] args) in C:\TFS\robert.hartmann\PCO\Features\CDW5.0 Prototyping\Sources\DTSx\DataVault_Staging_CDW\DV_BII30\Program.cs:line 119方法时，我收到错误，告诉我序列化工人类时出现问题。

所以我想这是因为在序列化基类时服务确实存在问题，而是获取继承类。但是如何轻松解决这个问题？

编辑：例外：

.length

Answer 1

错误消息告诉您该怎么做：

InnerException消息是＆＃39; Type＆＃39; DV_BII30.ExecSQLWorker＆＃39;使用数据合同名称＆＃39; ExecSQLWorker：http://schemas.datacontract.org/2004/07/DV_BII30＆＃39;不是预期的。如果您正在使用DataContractSerializer或者将任何静态未知的类型添加到已知类型列表中，请考虑使用DataContractResolver - 例如，通过使用KnownTypeAttribute属性或将它们添加到传递给序列化程序的已知类型列表中。＆＃39; 。有关更多详细信息，请参阅InnerException。 ---＆GT; System.Runtime.Serialization.SerializationException：键入＆＃39; DV_BII30.ExecSQLWorker＆＃39;使用数据合同名称＆＃39; ExecSQLWorker：http://schemas.datacontract.org/2004/07/DV_BII30＆＃39;不是预期的。如果您正在使用DataContractSerializer或者将任何静态未知的类型添加到已知类型列表中，请考虑使用DataContractResolver - 例如，使用KnownTypeAttribute属性或将它们添加到传递给序列化程序的已知类型列表中。

您有几种方法可以解决此问题。

将WorkerTemplate

添加到KnownTypeAttribute班级

[DataContract]
[KnownType(typeof(ExecSQLWorker))]
[KnownType(typeof(CopyWorker))]
public class WorkerTemplate
{
    //Properties and stuff
}

如果您可以更改IPQWService界面，请查看here

您可以使用DataContractResolver

public class SharedTypeResolver : DataContractResolver
{
    public override bool TryResolveType(Type dataContractType, Type declaredType, DataContractResolver knownTypeResolver, out XmlDictionaryString typeName, out XmlDictionaryString typeNamespace)
    {
        if (!knownTypeResolver.TryResolveType(dataContractType, declaredType, null, out typeName, out typeNamespace))
        {
            XmlDictionary dictionary = new XmlDictionary();
            typeName = dictionary.Add(dataContractType.FullName);
            typeNamespace = dictionary.Add(dataContractType.Assembly.FullName);
        }
    }

    public override Type ResolveName(string typeName, string typeNamespace, Type declaredType, DataContractResolver knownTypeResolver)
    {
        return knownTypeResolver.ResolveName(typeName, typeNamespace, declaredType, null) ?? Type.GetType(typeName + ", " + typeNamespace);
    }
}

解析器接受您在服务中使用的每种类型。但您必须将解析程序添加到客户端端点和服务器端点。像这样：

Host = new ServiceHost(typeof(MyService));

ContractDescription cd = Host.Description.Endpoints[0].Contract;
foreach (var operation in cd.Operations)
{
    operation.Behaviors.Find<DataContractSerializerOperationBehavior>()
            .DataContractResolver = new SharedTypeResolver();
}

使用基类作为WCF服务的参数

1 个答案: