无法侦听管道名称，因为另一个管道端点已在侦听该名称

Question

我收到以下错误：

无法侦听管道名称'net.pipe：// localhost / ServiceModelSamples / service /'，因为另一个管道端点已在侦听该名称

我从另一个WCF调用中调用Windows服务中的WCF自托管服务，如下所示。

$

                  ServiceHost _host;
        var guidid = Guid.NewGuid().ToString() ;

        _host = new ServiceHost(typeof(CalculatorService), new Uri[] { new Uri("net.pipe://localhost/" + guidid)});

        _host.AddServiceEndpoint(typeof(ICalculator),
                new NetNamedPipeBinding(),
                "");

        _host.Open();

        ChannelFactory<ICalculator> factory = new ChannelFactory<ICalculator>(
            new NetNamedPipeBinding(NetNamedPipeSecurityMode.None),
            new EndpointAddress("net.pipe://localhost/" + guidid));
        ICalculator proxy = factory.CreateChannel();
        proxy.SendPin(pin);
        ((IClientChannel)proxy).Close();
        factory.Close();

自托管WCF服务

$
     命名空间PINSender      {

// Define a service contract.    

public interface ICalculator
{
    [OperationContract]
    void SendPin(string pin);
}

// Implement the ICalculator service contract in a service class.
public class CalculatorService : ICalculator
{
    // Implement the ICalculator methods.
    public void  SendPin(string pin)
    {

    }
}

public class CalculatorWindowsService : ServiceBase
{
    public ServiceHost serviceHost = null;
    public CalculatorWindowsService()
    {
        // Name the Windows Service
        ServiceName = "PINSenderService";
    }

    public static void Main()
    {
        ServiceBase.Run(new CalculatorWindowsService());
    }

    // Start the Windows service.
    protected override void OnStart(string[] args)
    {
        if (serviceHost != null)
        {
            serviceHost.Close();
        }

        // Create a ServiceHost for the CalculatorService type and 
        // provide the base address.
        serviceHost = new ServiceHost(typeof(CalculatorService));

        // Open the ServiceHostBase to create listeners and start 
        // listening for messages.
        serviceHost.Open();
    }

    protected override void OnStop()
    {
        if (serviceHost != null)
        {
            serviceHost.Close();
            serviceHost = null;
        }
    }
}

// Provide the ProjectInstaller class which allows 
// the service to be installed by the Installutil.exe tool
[RunInstaller(true)]
public class ProjectInstaller : Installer
{
    private ServiceProcessInstaller process;
    private ServiceInstaller service;

    public ProjectInstaller()
    {
        process = new ServiceProcessInstaller();
        process.Account = ServiceAccount.LocalSystem;
        service = new ServiceInstaller();
        service.ServiceName = "PINSenderService";
        Installers.Add(process);
        Installers.Add(service);
    }
  }

}

App.Config中

$

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.serviceModel>
<bindings>
  <!-- 
    Following is the expanded configuration section for a NetNamedPipeBinding.
    Each property is configured with the default value.
 -->
  <netNamedPipeBinding>
    <binding name="Binding1"
             closeTimeout="00:01:00"
             openTimeout="00:01:00"
             receiveTimeout="00:10:00"
             sendTimeout="00:01:00"
             transactionFlow="false"
             transferMode="Buffered"
             transactionProtocol="OleTransactions"
             hostNameComparisonMode="StrongWildcard"
             maxBufferPoolSize="524288"
             maxBufferSize="65536"
             maxConnections="10"
             maxReceivedMessageSize="65536">
      <security mode="Transport">
        <transport protectionLevel="EncryptAndSign" />
      </security>
    </binding>
  </netNamedPipeBinding>
</bindings>

<services>

  <service name="PINSender.CalculatorService"
           behaviorConfiguration="CalculatorServiceBehavior">
    <host>
      <baseAddresses>            
        <add baseAddress="net.pipe://localhost/PINSenderService"/>
      </baseAddresses>          
    </host>

    <endpoint address=""
              binding="netNamedPipeBinding"
              contract="PINSender.ICalculator" bindingConfiguration="Binding1" />
    <endpoint address="mex"
              binding="mexNamedPipeBinding"
              contract="IMetadataExchange" />                 
  </service>
</services>
<behaviors>      
  <serviceBehaviors>        
    <behavior name="CalculatorServiceBehavior">
      <serviceMetadata httpGetEnabled="False"  />
      <serviceDebug includeExceptionDetailInFaults="False"/>
    </behavior>
  </serviceBehaviors>
  </behaviors>
 </system.serviceModel>