WCF netTcpBinding 问题：Contract 需要 Duplex，但 Binding 'BasicHttpBinding' 不支持它或未正确配置以支持它

Question

我正在尝试在 WCF 服务中创建回调。到目前为止，服务使用的是 basicHttpBinding，因此我想为 netTcpBinding 添加另一个端点。服务已托管在 IIS 中。首先它是在 IIS 6 中托管的，但后来我安装了 IIS 7。

所以，我收到以下错误：

The requested service, 'net.tcp://localhost:1801/MyServiceName.svc/NetTcpExampleAddress' could not be activated. See the server's diagnostic trace logs for more information.

看到日志时，是这样的信息：

所以主要错误是：

Contract requires Duplex, but Binding 'BasicHttpBinding' doesn't support it or isn't configured properly to support it.

这是我的配置文件：

我的Web.config服务器：

<system.serviceModel>
    <bindings>
      <netTcpBinding>
        <binding name="demoServiceNetTcpBinding">
          <security mode="None"/>
        </binding>
      </netTcpBinding>
      <basicHttpBinding>
        <binding name="demoServiceHttpBinding" receiveTimeout="00:05:00" sendTimeout="00:05:00" maxReceivedMessageSize="2147483647">
          <security mode="None"/>
        </binding>        
      </basicHttpBinding>
    </bindings>
    <services>
      <service name="MyServerName.MyServiceName">
        <host>
          <baseAddresses>
            <add baseAddress="net.tcp://localhost:1801/MyServiceName.svc/"/>
            <add baseAddress="http://localhost:1800/MyServiceName.svc/"/>
          </baseAddresses> 
        </host>
    <endpoint 
        address="NetTcpExampleAddress" 
        binding="netTcpBinding" 
        bindingConfiguration="demoServiceNetTcpBinding" 
        contract="MyServerName.SharedContract.IMyServiceName"/>
    <endpoint 
        address="BasicHttpExampleAddress" 
        binding="basicHttpBinding" 
        bindingConfiguration="demoServiceHttpBinding" 
        contract="MyServerName.SharedContract.IMyServiceName"/>
    <endpoint address="mex" binding="mexTcpBinding" contract="IMetadataExchange" />
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <serviceDebug includeExceptionDetailInFaults="true"/>
          <serviceMetadata httpGetEnabled="true"/>
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>

我的App.config客户：

  <system.serviceModel>
    <bindings>
      <netTcpBinding>
        <binding name="demoServiceNetTcpBinding">
          <security mode="None"/>
        </binding>
      </netTcpBinding>
      <basicHttpBinding>
        <binding name="demoServiceHttpBinding" receiveTimeout="00:05:00" sendTimeout="00:05:00" maxReceivedMessageSize="2147483647">
          <security mode="None"/>
        </binding>        
      </basicHttpBinding>
    </bindings>
    <client>
      <endpoint name="NetTcpExampleName"
          address="net.tcp://localhost:1801/DicomQueryService.svc/NetTcpExampleAddress"
          bindingConfiguration ="demoServiceNetTcpBinding"
          contract="MyServerName.SharedContract.IMyServiceName"
          binding="netTcpBinding" />
      <endpoint name="BasicHttpExampleName"
          address="http://localhost:1800/MyServiceName.svc/BasicHttpExampleAddress"
          bindingConfiguration ="demoServiceHttpBinding"
          contract="MyServerName.SharedContract.IMyServiceName"
          binding="basicHttpBinding" />
    </client>
  </system.serviceModel>

我的 IIS 中的设置：

如果您需要任何其他代码，请告诉我，我会更新问题。

编辑 1：

以下是代码的更多详细信息，说明我如何从客户端（在客户端）调用服务：

public class MyCommandClass : IMyServiceCallback
{
    public MyCommandClass()
    {
        var ctx = new InstanceContext(new MyCommandClass());
        DuplexChannelFactory<MyServerName.SharedContract.IMyServiceName> channel = new DuplexChannelFactory<MyServerName.SharedContract.IMyServiceName>(ctx, "NetTcpExampleName");
        MyServerName.SharedContract.IMyServiceName clientProxy = channel.CreateChannel();
        clientProxy.MyFunction(); //debug point is comming here and then it throws the error
        clientProxy.ProcessReport();
        (clientProxy as IClientChannel).Close();
        channel.Close();
    }

    public void Progress(int percentageCompleted)
    {
        Console.WriteLine(percentageCompleted.ToString() + " % completed");
    }
}

其中接口（在服务器端）定义为：

[ServiceContract(CallbackContract = typeof(IMyServiceCallback))]
public interface IMyServiceName
{
    [OperationContract]
    void MyFunction();

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

public interface IMyServiceCallback
{
    [OperationContract(IsOneWay = true)]
    void Progress(int percentageCompleted);    
}

服务（在服务器端）定义为：

public class MyServiceName: IMyServiceName
{
    public void MyFunction()
    {
        //do something
    }

    public void ProcessReport()
    {
        //trigger the callback method
        for (int i = 1; i <= 100; i++)
        {
            Thread.Sleep(100);
            OperationContext.Current.GetCallbackChannel<IMyServiceCallback>().Progress(i);
        }
    }
}

到目前为止我的方法只是一个演示。一旦与此问题相关的错误得到修复，我就会开始开发这些方法。

Answer 1

您的服务合同需要双工连接（您有 ServiceCallback 属性）。因此，此服务公开的所有端点都必须支持双工连接。 Net.tcp 支持它，但 basicHttp 不支持，因此您现在不能在您的服务中使用 basicHttp。

WCF netTcpBinding 问题：Contract 需要 Duplex，但 Binding 'BasicHttpBinding' 不支持它或未正确配置以支持它

WCF netTcpBinding issue: Contract requires Duplex, but Binding 'BasicHttpBinding' doesn't support it or isn't configured properly to support it

wcf

wcf-binding

nettcpbinding

wcf-callbacks

duplex-channel