Question

我正在编写一个Silverlight 5客户端要使用的双工服务。我的服务器配置看起来像这样（显然在正确的位置） -

            <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"/>

你看到的合同就是这个 -

[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();
}

这似乎很好，但我不是百分之百确定。

我的客户端代码如下所示 -

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);

    }

当我跳过'factory.EndConnect（result）'时，我收到了ContractFilter不匹配问题，但我不明白为什么。显然在服务器上我正在实现Async接口的同步版本（所以只是Connect而不是Begin / EndConnect），但这是我能想到的唯一一个不匹配合同的地方。

我现在真的把头发拉出来......我已经秃了！任何帮助都会非常感激。

提前致谢。

Answer 1

请通过明确设置服务接口的名称和名称空间来尝试，不应该由于客户端中不同的CLR名称空间而导致不匹配问题和服务器。

[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

并且记得将该版本从4.0.0.0更改为5.0.0.0，因为您使用的是SL 5（我假设您已从c：\ Program Files（x86）\ Microsoft加载了正确的System.ServiceModel.PollingDuplex程序集的SDK \ Silverlight的\ V5.0 \库\服务器）

PollingDuplexHttpBinding和DuplexChannelFactory - “EndpointDispatcher上的ContractFilter不匹配”

2 个答案: