我正在尝试在 Windows 服务中托管 WCF net.pipe 服务。我在代码中定义服务，在 Windows 服务的OnStart()函数中。我也以类似的方式创建客户端 - 在代码中。
我看到有人问过这个问题，但它似乎总是只针对在 app/web.config 文件中定义 NetNamedPipe 的情况。
尝试调用服务时，出现错误：
System.ServiceModel.ProtocolException: The requested upgrade is not supported by 'net.pipe://localhost/manager'. This could be due to mismatched bindings (for example security enabled on the client and not on the server).
Server stack trace:
at System.ServiceModel.Channels.ConnectionUpgradeHelper.DecodeFramingFault(ClientFramingDecoder decoder, IConnection connection, Uri via, String contentType, TimeoutHelper& timeoutHelper)
at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.SendPreamble(IConnection connection, ArraySegment`1 preamble, TimeoutHelper& timeoutHelper)
at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.DuplexConnectionPoolHelper.AcceptPooledConnection(IConnection connection, TimeoutHelper& timeoutHelper)
at System.ServiceModel.Channels.ConnectionPoolHelper.EstablishConnection(TimeSpan timeout)
at System.ServiceModel.Channels.ClientFramingDuplexSessionChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.OnOpen(TimeSpan timeout)
at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannel.CallOnceManager.CallOnce(TimeSpan timeout, CallOnceManager cascade)
at System.ServiceModel.Channels.ServiceChannel.EnsureOpened(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 MyClientApp.IManager.HelloWorld()
这是我的代码：
//Service Contract:
[ServiceContract]
public interface IManager
{
[OperationContract]
string HelloWorld();
}
//Service
public class Manager : IManager
{
public string HelloWorld()
{
return "Hello to you too!";
}
}
//Defining and starting the Net.Pipe Service from the Windows Service
public partial class MyWindowsService : ServiceBase
{
public MyWindowsService()
{
InitializeComponent();
}
private ServiceHost m_serviceHost;
protected override void OnStart(string[] args)
{
try
{
m_serviceHost = new ServiceHost(typeof(Manager), new Uri("net.pipe://localhost"));
NetNamedPipeBinding binding = new NetNamedPipeBinding(NetNamedPipeSecurityMode.None);
m_serviceHost.AddServiceEndpoint(typeof(IManager), binding, "manager");
m_serviceHost.Open();
}
catch (Exception ex)
{
EventLog("MyWindowsService", ex.ToString(), EventLogEntryType.Error);
}
}
}
//The client proxy
public class ManagerProxy : ClientBase<IManager>
{
public ManagerProxy()
: base(new ServiceEndpoint(ContractDescription.GetContract(typeof(IManager)),
new NetNamedPipeBinding(), new EndpointAddress("net.pipe://localhost/manager"))) { }
public string InvokeHellowWorld()
{
return Channel.HelloWorld();
}
}
该接口位于 ClassLibrary 项目中，并在主机应用程序（Windows 服务）和尝试调用该服务的客户端应用程序之间共享。
Service 类和 OnStart 函数位于 Windows Service 项目中。
服务代理位于客户端项目中（当然，它与 Windows 服务在同一台机器上运行）。
此外，每当我尝试使用代理时，我发现它的State == CommunicationState.Faulted. 然后我关闭/中止它，并创建一个new ManagerProxy(). 的状态ManagerProxy为Created。我尝试调用HelloWorld并获取上述内容Exception。
下次我尝试使用它时 - 它的状态再次出现Faulted并且该过程重复。