这与我之前提出的问题有关:
我有一个定义事务类的 DLL。它由 WCF 服务库和客户端应用程序引用。我收到错误消息,指出无法托管服务库,因为它无法序列化 DLL 类。
这是服务代码:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using ServerLibrary.MarketService;
using SharedLibrary; // This is the DLL in question
namespace ServerLibrary
{
[ServiceContract]
public interface IService
{
[OperationContract]
string GetData(int value);
[OperationContract]
CompositeType GetDataUsingDataContract(CompositeType composite);
[OperationContract]
bool ProcessTransaction(SharedLibrary.Transaction transaction);
}
[DataContract]
public class CompositeType
{
bool boolValue = true;
string stringValue = "Hello ";
[DataMember]
public bool BoolValue
{
get { return boolValue; }
set { boolValue = value; }
}
[DataMember]
public string StringValue
{
get { return stringValue; }
set { stringValue = value; }
}
}
}
我是否必须在此处用 [attribute] header 标记 Transaction 类?
[更新]
这是我在尝试托管此服务时收到的错误消息:
System.Runtime.Serialization.InvalidDataContractException: Type 'SharedLibrary.Transaction' cannot be serialized. Consider marking it with the DataContractAttribute attribute, and marking all of its members you want serialized with the DataMemberAttribute attribute. If the type is a collection, consider marking it with the CollectionDataContractAttribute. See the Microsoft .NET Framework documentation for other supported types. 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.DataContractCriticalHelper.GetDataContractSkipValidation(Int32 id, RuntimeTypeHandle typeHandle, Type type) at System.Runtime.Serialization.XsdDataContractExporter.GetSchemaTypeName(Type type) at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.ValidateDataContractType(Type type) at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.CreatePartInfo(MessagePartDescription part, OperationFormatStyle style, DataContractSerializerOperationBehavior serializerFactory) at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter.CreateMessageInfo(DataContractFormatAttribute dataContractFormatAttribute, MessageDescription messageDescription, DataContractSerializerOperationBehavior serializerFactory) at System.ServiceModel.Dispatcher.DataContractSerializerOperationFormatter..ctor(OperationDescription description, DataContractFormatAttribute dataContractFormatAttribute, DataContractSerializerOperationBehavior serializerFactory) at System.ServiceModel.Description.DataContractSerializerOperationBehavior.GetFormatter(OperationDescription operation, Boolean& formatRequest, Boolean& formatReply, Boolean isProxy) at System.ServiceModel.Description.DataContractSerializerOperationBehavior.System.ServiceModel.Description.IOperationBehavior.ApplyDispatchBehavior(OperationDescription description, DispatchOperation dispatch) at System.ServiceModel.Description.DispatcherBuilder.BindOperations(ContractDescription contract, ClientRuntime proxy, DispatchRuntime dispatch) at System.ServiceModel.Description.DispatcherBuilder.InitializeServiceHost(ServiceDescription description, ServiceHostBase serviceHost) at System.ServiceModel.ServiceHostBase.InitializeRuntime() at System.ServiceModel.ServiceHostBase.OnBeginOpen() at System.ServiceModel.ServiceHostBase.OnOpen(TimeSpan timeout) at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout) at System.ServiceModel.Channels.CommunicationObject.Open() at Microsoft.Tools.SvcHost.ServiceHostHelper.OpenService(ServiceInfo info)
此处请求的是包含事务的 DLL:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace SharedLibrary
{
// Transaction class to encapsulate products and checkout data
public class Transaction
{
public int checkoutID;
public DateTime time;
public List<object> products; // Using object to avoid MarketService reference, remember to cast back!
public double totalPrice;
public bool complete;
public Transaction(int ID)
{
checkoutID = ID;
}
public void Start()
{
products = new List<object>();
complete = false;
}
public void Complete()
{
time = DateTime.Now;
complete = true;
}
}
}
谢谢。
最佳答案
Do I have to mark the Transaction class here with [attribute] headers?
不,您不必这样做,但建议这样做。参见 Using Data Contracts .
问题是您在 List<object>
中传递派生对象.
您必须使用 ServiceKnownType 告诉服务要处理什么类型的对象属性:
[OperationContract]
[ServiceKnownType( typeof( MarketService.XXX ) )]
bool ProcessTransaction(SharedLibrary.Transaction transaction);
关于c# - 在 WCF 服务中标记引用的库类,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/10375226/