wcf异步回调抛出tcp异常

Question

我已经通过tcp实现了客户端 - 服务器应用程序。我使用的是异步模式，因为我只限于.NET 3.5。在这种情况下，我被迫使用ChannelFactory以便在客户端和服务器之间进行通信，而无需生成代码。这个简单的应用程序基于一个简单的MSDN wcf异步示例（尽管没有客户端代码）。服务托管在Windows服务中。当我调用Begin方法时，一切正常，但是当我尝试从回调中的End方法获得结果时，我得到TCP错误10061：“无法建立连接，因为目标机器主动拒绝它......”。合同保存在单独的DLL中，该DLL包含在服务实现DLL和客户端DLL中。服务和Windows服务的配置文件是相同的。

这是我的合同

[ServiceContractAttribute]
public interface ISampleService
{
    [OperationContractAttribute]
    string SampleMethod(string msg);

    [OperationContractAttribute(AsyncPattern = true)]
    IAsyncResult BeginSampleMethod(string msg, AsyncCallback callback, object asyncState);

    string EndSampleMethod(IAsyncResult result);
}

IAsyncResult实施：

public class CompletedAsyncResult<T> : IAsyncResult
{
    T data;

    public CompletedAsyncResult(T data)
    { this.data = data; }

    public T Data
    { get { return data; } }

    #region IAsyncResult Members
    public object AsyncState
    { get { return (object)data; } }

    public WaitHandle AsyncWaitHandle
    { get { throw new Exception("The method or operation is not implemented."); } }

    public bool CompletedSynchronously
    { get { return true; } }

    public bool IsCompleted
    { get { return true; } }
    #endregion
}

服务实施：

public class SampleService : ISampleService
{
    public string SampleMethod(string msg)
    {
        return "sync " + msg;
    }

    // This asynchronously implemented operation is never called because 
    // there is a synchronous version of the same method.
    public IAsyncResult BeginSampleMethod(string msg, AsyncCallback callback, object asyncState)
    {
        Console.WriteLine("BeginSampleMethod called with: " + msg);
        return new CompletedAsyncResult<string>(msg);
    }

    public string EndSampleMethod(IAsyncResult r)
    {
        Thread.Sleep(5000);
        CompletedAsyncResult<string> result = r as CompletedAsyncResult<string>;
        Console.WriteLine("EndSampleMethod called with: " + result.Data);
        return result.Data + " after processing";
    }
}

服务配置：

<system.serviceModel>
    <bindings>
      <netTcpBinding>

        <binding name="TcpUnsecured">
          <reliableSession ordered="true" inactivityTimeout="00:10:00"
                        enabled="false" />
          <security mode="Transport" />
        </binding>
      </netTcpBinding>
    </bindings>
    <services>
      <service behaviorConfiguration="Cube.Service1Behavior" name="Cube.ISampleService">
        <clear />
        <endpoint address="mex" binding="mexTcpBinding" bindingConfiguration=""
          name="mex" contract="IMetadataExchange" listenUriMode="Explicit">
          <identity>
            <dns value="localhost" />
            <certificateReference storeName="My" storeLocation="LocalMachine"
              x509FindType="FindBySubjectDistinguishedName" />
          </identity>
        </endpoint>
        <endpoint address="net.tcp://DavePC:1430/Test" 
                  binding="netTcpBinding" 
                  bindingConfiguration="TcpUnsecured"
                  name="tcp" 
                  contract="ns.ISampleService" />
        <host>
          <baseAddresses>
            <add baseAddress="net.tcp://DavePC:1430/Test" />
          </baseAddresses>
        </host>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="Cube.Service1Behavior">
          <serviceMetadata httpGetEnabled="false" />
          <serviceDebug includeExceptionDetailInFaults="false" />
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>

客户端实施：

public delegate void AsyncSampleAction(string result, ISampleService c);
class Program
{

    static void Main(string[] args)
    {
        TestMSDNAsyncWCF();
    }

    private static void TestMSDNAsyncWCF()
    {
         ISampleService channel = GetChannelSampleService();

        IAsyncResult result = channel.BeginSampleMethod("FINALLY ASYNC", FinishSampleAction, channel);

        Console.WriteLine("Press any key to continue . . .");
        Console.ReadKey(false);
    }

    static void FinishSampleAction(IAsyncResult ar)
    {
        var state = (ISampleService) ar.AsyncState;
        string msg = state.EndSampleMethod(ar);
        Console.WriteLine(msg);
    }

    private static ISampleService GetChannelSampleService()
    {
        ChannelFactory<ISampleService> factory = null;
        factory = new ChannelFactory<ISampleService>("tcp");
        ISampleService channel = factory.CreateChannel();
        return channel;
    }
}

客户端配置：

<configuration>
  <system.serviceModel>
    <bindings>
      <netTcpBinding>

        <binding name="TcpUnsecured">
          <reliableSession ordered="true" inactivityTimeout="00:10:00"
                        enabled="false" />
          <security mode="Transport" />
        </binding>
      </netTcpBinding>
    </bindings>
    <behaviors>
      <serviceBehaviors>
        <behavior name="Cube.Service1Behavior">
          <serviceMetadata httpGetEnabled="false" />
          <serviceDebug includeExceptionDetailInFaults="false" />
        </behavior>
      </serviceBehaviors>
    </behaviors>
    <client>
      <endpoint name="tcp"
                address="net.tcp://DavePC:1430/Test"
                contract="ns.ISampleService"
                binding="netTcpBinding"
                bindingConfiguration="TcpUnsecured" />
    </client>
  </system.serviceModel>
</configuration>

我知道这很冗长但我现在看不到解决方案。