PollingDuplexHttpBinding和DuplexChannelFactory -“EndpointDispatcher上的ContractFilter不匹配”

Question

我正在编写一个供Silverlight5客户端使用的双工服务。我的服务器配置看起来像这样(显然是在正确的地方)-

            <bindingExtensions>
                <add name="pollingDuplexHttpBinding"
                     type="System.ServiceModel.Configuration.PollingDuplexHttpBindingCollectionElement, System.ServiceModel.PollingDuplex, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
            </bindingExtensions>

<pollingDuplexHttpBinding>
                <binding name="multipleMessagesPerPollPollingDuplexHttpBinding"
                         duplexMode="MultipleMessagesPerPoll"
                         maxOutputDelay="00:00:07"/>
            </pollingDuplexHttpBinding>

<endpoint address="Duplex"
                          binding="pollingDuplexHttpBinding"
                          bindingConfiguration="multipleMessagesPerPollPollingDuplexHttpBinding"
                          contract="ProActive.Domain.Interfaces.IDuplexService"/>

你看到的合同是这样的-

[ServiceContract(Name = "IDuplexService", CallbackContract = typeof(IDuplexClient))]
    public interface IDuplexServiceAsync
    {
        [OperationContract(AsyncPattern = true)]
        IAsyncResult BeginConnect(int userId, AsyncCallback callback, object asyncState);

        void EndConnect(IAsyncResult result);
    }

[ServiceContract]
public interface IDuplexClient
{
    [OperationContract(IsOneWay = true)]
    void Refresh();
}

这个主机似乎还不错，但我不能百分之百地确定。

我的客户代码看起来像这样-

public class client : IDuplexClient
{
    #region IDuplexClient Members

    public void Refresh()
    {

    }

    #endregion
}



 public someOtherClass
    {
var binding = new PollingDuplexHttpBinding();
            binding.DuplexMode = PollingDuplexMode.MultipleMessagesPerPoll;

            var address = new EndpointAddress("http://" + ConfigService.ServerName + "/Service.svc/Duplex/");

            var factory = new DuplexChannelFactory<IDuplexServiceAsync>(
                new InstanceContext(new client()), binding).CreateChannel(address);
            factory.BeginConnect(0, new AsyncCallback((result) =>
                {
                    factory.EndConnect(result);

                }), null);

    }

当我跨过‘factory.EndConnect( ContractFilter )’时，我得到了一个结果不匹配的问题，但我不明白为什么。显然，在服务器上，我正在实现异步接口的同步版本(所以只实现Connect而不是Begin/EndConnect)，但这是我能想到的唯一不匹配的契约。

我真的很难受，我已经谢顶了。now...and。任何帮助都将不胜感激。

提前谢谢。

Answer 1

请通过明确设置您的服务接口的name和 namespaces 来尝试一下，您应该不会因为客户端和服务器端的CLR命名空间不同而出现不匹配的问题。

[ServiceContract(Name = "IClient", Namespace = "http://your.namespace")]
public interface IClient
{
    [OperationContract(IsOneWay = true)]
    void DoSomething();

    [OperationContract(IsOneWay = true)]
    void DoSomethingElse();
}

[ServiceContract(Name = "IServer", Namespace = "http://your.namespace", CallbackContract = typeof(IClient))]
public interface IServer
{
#if !SILVERLIGHT
    [OperationContract]
    string Operation1(string userName);

    [OperationContract]
    int Operation2(int x, int y);
#else
    [OperationContract(AsyncPattern = true)]
    IAsyncResult BeginOperation1(string userName, AsyncCallback callback, object state);
    string EndOperation1(IAsyncResult asyncResult);

    [OperationContract(AsyncPattern = true)]
    IAsyncResult BeginOperation2(int x, int y, AsyncCallback callback, object state);
    int EndOperation2(IAsyncResult asyncResult);
#endif
}

Answer 2

记住将版本从4.0.0.0改为5.0.0.0，因为您使用的是SL5(我假设您已经从c:\Program Files (x86)\Microsoft \Silverlight\v5.0\Libraries\ System.ServiceModel.PollingDuplex加载了正确的服务器程序集)