回调客户端不工作在wcf wsdualhttpbinding

Question

我有一个wcf双工服务和两个客户端。情景是，client1向wcf提交请求，wcf将请求存储在DB.client2中处理从DB获取的请求，并将状态发送到wcf服务，从而通知客户端1状态。 client1的回调地址存储在一个静态变量中.client2通知wcf，但wcf不通知client1。任何解决方案，请。 在此先感谢

service.cs：

public class Service1 : IService1 
    { 
     static List<IServiceCallback> list = new List<IServiceCallback>(); 
     static IServiceCallback Callbck; 

     public bool GetData(int value) 
     { 
      int i = 0; 
      string s= string.Format("You entered: {0}", value); 
      Callbck = OperationContext.Current.GetCallbackChannel<IServiceCallback>(); 

      i++; 
      list.Add(Callbck); 
      Ret("sss..."); 
      return true; 
     } 

     public void Ret(string s) 
     { 

      foreach (var c in list) 
      { 

       Callbck.display(s); 
          } 
     } 

      } 

client1.cs：

class Program 
    { 

     static void Main(string[] args) 
     { 
             InstanceContext instance = new InstanceContext(new Handler()); 
       Service1Client client = new Service1Client(instance); 


           bool res = client.GetData(123); 

       if (res) 
        Console.WriteLine("true"); 


        } 
    } 
    public class Handler :IService1Callback 
    { 
     public void display(string s) 
     { 
      Console.WriteLine(s); 

     } 


    } 

client2.cs：

class Program 
    { 
     static void Main(string[] args) 
     { 
      int i = 0; 
      i++; 
         Display(); 
     } 

     public static void Display() 
     { 
      Console.WriteLine("hello"); 
      InstanceContext context = new InstanceContext(new Handlerss()); 
      Service1Client client = new Service1Client(context); 

      client.Ret("done"); 


     } 
    } 

    class Handlerss : IService1Callback 
    { 
     public void display(string s) 
     { 
      Console.WriteLine(s); 
     } 
    } 

Answer 1

我没有看到为您服务的任何InstanceContextMode集？你应该设置Single来让你的应用程序像你想要的那样工作。否则两个客户端都会获得新的服务。

用于调试您可以将以下内容添加到您的服务。只是为了看看你的客户端回叫通道是关闭还是出现故障

public bool GetData(int value) 
    { 
     int i = 0; 
     string s= string.Format("You entered: {0}", value); 
     var callback= OperationContext.Current.GetCallbackChannel<IServiceCallback>(); 

     ICommunicationObject obj = (ICommunicationObject)callback; 
     obj.Closed += SubscribedServiceClosed;//write log or console or something else 
     obj.Faulted += SubscribedServiceFaulted;//write log or console or something else 

     i++; 
     list.Add(callback); 
     Ret("sss..."); 
     return true; 
    }