wcf 回调，从 Service 类外部调用客户端答案

【问题标题】：wcf callback, call client from outside the Service classwcf 回调，从 Service 类外部调用客户端
【发布时间】：2014-09-08 14:44:08
【问题描述】：

所以我有一个拥有多个客户端的 selfhostet 服务 (netTcpBinding)。现在我想通过程序其他部分的回调调用客户端...

类似

ServiceHost shintern = new ServiceHost(typeof(InternalService));
shintern.Open();

（后来，我们订阅了客户端）...

shintern.GetClients().ForEach(...client_function());

实际上我有 2 个服务（Extern Rest/WS，Intern netTcp）正在运行，我想实现类似的东西：

    ServiceExtern::GetSomethingFromInternClients()
    {
         //return values of clients connected to intern Service. 
    }

如果你喜欢，我也可以添加一些代码。问候

【问题讨论】：

标签： c# wcf callback nettcpbinding

【解决方案1】：

好的，我以某种方式做到了（不太喜欢）。

“实习生”客户所依赖的服务如下所示。

[ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Single, InstanceContextMode = InstanceContextMode.Single)]
    public class pwGateInternalService : IpwGateInternalService
    {
        static List<SchoolCallback> m_schools = new List<SchoolCallback>();

        //non contract Functions:

        public List<SchoolCallback> GetClientList()
        {
            return m_schools;
        }

        //Contract Functions:

        public ServiceStatus Connect(string schoolname)
        {
            ServiceStatus result = new ServiceStatus();
            int schoolid = Config.GetIdentifier(schoolname);

            //add to dynamic list of schools
            IpwGateInternalCallback callback = OperationContext.Current.GetCallbackChannel<IpwGateInternalCallback>();
            if (m_schools.Find(x => x.callback == callback) == null)
            {
                SchoolCallback school = new SchoolCallback(schoolid, schoolname, callback);
                m_schools.Add(school);

                result.status = eStatus.success;
            }
            else
            {
                //already found
                result.status = eStatus.error;
                result.strError = "a client with your name is already connected";

                //TODO
                //mail?
            }
            return null;
        }

        public void Disconnect()
        { 
            //remove from dynamic list
            IpwGateInternalCallback callback = OperationContext.Current.GetCallbackChannel<IpwGateInternalCallback>();
            SchoolCallback school = m_schools.Find(x => x.callback == callback);
            if (school != null)
            {
                m_schools.Remove(school);
            }


        }//Disconnect()
    }//callback interface

无论何时何地我想访问客户列表，我都会这样做：

pwGateInternalService internService = new pwGateInternalService();
List<SchoolCallback> schools = internService.GetClientList();
SchoolCallback school = schools.Find(x => x.identifier == targetschool.identifier);

if (school != null)
{  
    user = school.callback.GetUser(username);
}

【讨论】：