我使用这两篇文章作为实现 IErrorHandler 的参考：
（我正在使用 .net Framework 3.5。）
但是，我遇到了一些麻烦 - 每当我尝试启动服务时，都会收到以下错误：
System.Configuration.ConfigurationErrorsException：无法将行为扩展“errorHandlerExtension”添加到名为“Test.TestService.Service1Behavior”的服务行为，因为基础行为类型未实现 IServiceBehavior 接口。
这是我的代码和配置文件：
错误处理程序扩展.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel.Configuration;
using System.Configuration;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Description;
using System.ServiceModel.Dispatcher;
using System.Collections.ObjectModel;
namespace Test.TestService
{
class ErrorHandlerExtension:BehaviorExtensionElement,IServiceBehavior
{
public override Type BehaviorType
{
get { return typeof(ErrorHandler); }
}
protected override object CreateBehavior()
{
return new ErrorHandler();
}
void IServiceBehavior.AddBindingParameters(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase, Collection<ServiceEndpoint> endpoints, BindingParameterCollection bindingParameters)
{
}
private IErrorHandler GetInstance()
{
return new ErrorHandler();
}
void IServiceBehavior.ApplyDispatchBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
{
IErrorHandler errorHandlerInstance = GetInstance();
foreach (ChannelDispatcher dispatcher in serviceHostBase.ChannelDispatchers)
{
dispatcher.ErrorHandlers.Add(errorHandlerInstance);
}
}
void IServiceBehavior.Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
{
foreach (ServiceEndpoint endpoint in serviceDescription.Endpoints)
{
if (endpoint.Contract.Name.Equals("IMetadataExchange") &&
endpoint.Contract.Namespace.Equals("http://schemas.microsoft.com/2006/04/mex"))
continue;
foreach (OperationDescription description in endpoint.Contract.Operations)
{
if (description.Faults.Count == 0)
{
throw new InvalidOperationException("FaultContractAttribute not found on this method");
}
}
}
}
}
}
网络配置：
<system.serviceModel>
<extensions>
<behaviorExtensions>
<add name="errorHandlerExtension"
type="Test.TestService.ErrorHandlerExtension, Test.TestService, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" />
</behaviorExtensions>
</extensions>
<behaviors>
<serviceBehaviors>
<behavior name="Test.TestService.Service1Behavior">
<serviceMetadata httpGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="true" />
<errorHandlerExtension />
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
每当我摆脱 errorHandlerExtension / 元素时，该服务都可以正常工作，但是只要我包含 errorHandlerExtension 元素（带有错误），它就无法启动。我是 WCF 的新手，很困惑。有任何想法吗？
编辑：添加ErrorHandler.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Description;
using System.ServiceModel.Dispatcher;
using System.Collections.ObjectModel;
namespace Test.TestService
{
public class ErrorHandler:IErrorHandler
{
public bool HandleError(Exception error)
{
LogError("UnhandledError: "+ error);
return true;
}
public void ProvideFault(Exception error, MessageVersion version, ref Message fault)
{
FaultException faultException = new FaultException("Exception message:ProvideFault");
MessageFault messageFault = faultException.CreateMessageFault();
fault = Message.CreateMessage(version, messageFault, faultException.Action);
}
}
}