WCF在循环中调用Callback(从服务器)不会触发客户端回调实现 [英] WCF calling Callback(from server) in a loop doesn't fire up the client callback implementation

问题描述

我已经使用netTcpBinding实现了一个双工WCF，回调机制第一次运行良好，但是在第二次调用回调方法期间，客户端中没有启动任何东西，请让我知道是否有任何线索.

I have implemented a duplex WCF using netTcpBinding, Callback mechanism is working fine for the first time but during second call of call back method nothing fires up in client, Please let me know if you have any clue.

服务器代码:

public void IWillCallBack()
        {
            var callbackChannel = OperationContext.Current.GetCallbackChannel< ICallback>();
            var com =(ICommunicationObject)callbackChannel;

            com.Closing + = new EventHandler((object sender，EventArgs e)=>
            {
            });

            com.Faulted + =新的EventHandler((object sender，EventArgs e)=>
            {
            });

            Task.Factory.StartNew(()=>
            {
                for(int i = 0; i< 10; i ++)
                {
                    Thread.Sleep(1000);
                    Console.WriteLine(com.State);
                    callbackChannel.CallMeBack(String.Format("测试ID {0} ..." i));
                }
            });
        }

public void IWillCallBack()
        {
            var callbackChannel = OperationContext.Current.GetCallbackChannel<ICallback>();
            var com = (ICommunicationObject)callbackChannel;

            com.Closing += new EventHandler((object sender, EventArgs e) =>
            {
            });

            com.Faulted += new EventHandler((object sender, EventArgs e) =>
            {
            });

            Task.Factory.StartNew(() =>
            {
                for (int i = 0; i < 10; i++)
                {
                    Thread.Sleep(1000);
                    Console.WriteLine(com.State);
                    callbackChannel.CallMeBack(String.Format("Test ID {0}...", i));
                }
            });
        }

客户代码:

 私有静态void DuplexServiceDemo(IDoWork代理)
        {
            proxy.IWillCallBacl();
        }

 private static void DuplexServiceDemo(IDoWork proxy)
        {
            proxy.IWillCallBacl();
        }

公共类CallBack:ICallback
    {
       公共无效的CallMeBack(string sesssionId)
        {
            Console.WriteLine(sesssionId);
            Console.ReadKey();
        }
    }

 public class CallBack : ICallback
    {
        public void CallMeBack(string sesssionId)
        {
            Console.WriteLine(sesssionId);
            Console.ReadKey();
        }
    }

请不要让第一次回调确实在客户端中触发  CallMeBack，但是当2n3或3rd ...循环运行时，客户端中什么也没有发生.

Please not first time callback does trigger  CallMeBack in client , but when 2n3, or 3rd... loop runs nothing happens in client.

预先感谢！

deepak

推荐答案

Deepak

Hi Deepak,

您能否与我们分享您使用"Console.ReadKey();"的原因?在客户端吗?

Could you share us the reason you used "Console.ReadKey();" in client side?

对于您的问题，建议您将这一行注释为"Console.ReadKey();"在客户端代码中.

For your issue, I suggest you comment out this line "Console.ReadKey();" in client code.

public class CallBack : ICallback
     {
         public void CallMeBack(string sesssionId)
         {
             Console.WriteLine(sesssionId);
             //Console.ReadKey();
         }
     }

最好的问候，

Best Regards,

爱德华

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