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我有 2 个 WCF 服务,托管在一个 winform 应用程序中:1 个公开基本 http 绑定,1 个公开 IClientAccessService (webhttpbinding) 和一个具有 PollingDuplexHttpBinding 的接口和用于 silverlight 5 客户端的 NTLM 安全性。在某些情况下,pollingduplex 端点未正确打开,导致无法连接客户端。为了能够检测到这一点,浏览器应用程序中的 Silverlight 正在轮询接口,当收到响应时,它会通过 tcp 套接字通知服务。

当我没有收到浏览器外应用程序的通知时,我想重新启动 wcf 服务。通过在两个服务上调用 servicehost.close(),然后在 servicehost.open() 之后调用。

奇怪的是使用 basichttp 绑定打开/关闭服务成功,但是使用轮询双工绑定打开服务失败并出现 Channeldispatcher 异常:URI 的注册已经存在,http://localhost:18524/IService/因为端口仍然被关闭和中止声明服务主机。

我一直在玩 pollingduplex 通道的打开/关闭超时,延迟关闭/打开之间的时间,但没有效果。

有人知道如何释放 pollingduplex 连接的端口吗?

感谢帮助。

打开关闭代码: public void StartServices() { StopServices();

        try
        {
            var configSyncService = new ConfigurationSyncService();
            configSyncService.Open();

            var mainService = new Service();
            mainService.Open();

            serviceHosts.Add(configSyncService);
            serviceHosts.Add(mainService);
        }
        catch (Exception ex)
        {
            string msg = String.Format("Exception starting WCF service for Centrale:  {0}", ex.Message);

            LOG.Fatal(
                LogProperties.Bedienpost,
                ex,
                Resources.ERROR_STARTING_WCF,
                ex.Message);

            throw ex;
        }
     }

    public void StopServices()
    {
        try
        {
            var result = Parallel.ForEach(serviceHosts, service =>
            {
                if ((service != null) && (service.State == CommunicationState.Opened))
                {
                    try
                    {
                        service.Close();
                    }
                    finally
                    {
                        service.Dispose();
                        service = null;
                    }
                }
                else if ((service != null) && (service.State != CommunicationState.Faulted))
                {
                    service.Dispose();
                    service = null;
                }
            });

            if (result.IsCompleted)
            {
                serviceHosts.Clear();
            }
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message);
        }
    }

轮询双工通道的配置:

private Binding CreateCustomPollingDuplexBinding()
    {
        CustomBinding binding = new CustomBinding();
        binding.Name = "pollingDuplexHttpBinding";

        binding.ReceiveTimeout = new TimeSpan(0, 5, 0);
        binding.SendTimeout = new TimeSpan(0, 5, 0);
        binding.OpenTimeout = new TimeSpan(0, 5, 0);
        binding.CloseTimeout = new TimeSpan(0, 5, 0);

        binding.Elements.Add(new PollingDuplexBindingElement(PollingDuplexMode.SingleMessagePerPoll));

        TextMessageEncodingBindingElement textEncoding = new TextMessageEncodingBindingElement();
        textEncoding.ReaderQuotas.MaxArrayLength = int.MaxValue;
        textEncoding.ReaderQuotas.MaxBytesPerRead = int.MaxValue;
        textEncoding.ReaderQuotas.MaxDepth = int.MaxValue;
        textEncoding.ReaderQuotas.MaxNameTableCharCount = int.MaxValue;
        textEncoding.ReaderQuotas.MaxStringContentLength = int.MaxValue;

        binding.Elements.Add(textEncoding);

        HttpTransportBindingElement httpTransport = new HttpTransportBindingElement();
        httpTransport.MaxBufferPoolSize = int.MaxValue;
        httpTransport.MaxBufferSize = int.MaxValue;
        httpTransport.MaxReceivedMessageSize = int.MaxValue;
        httpTransport.AuthenticationScheme = AuthenticationSchemes.Ntlm;

        binding.Elements.Add(httpTransport);

        return binding;
    }
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