如何使用ServiceHost部署WCF应用程序?

本文介绍了如何使用ServiceHost部署WCF应用程序?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我的客户端:

class Program { static void Main(string[] args) { IService service = ChannelFactory<IService>.CreateChannel(new WSDualHttpBinding(),new EndpointAddress("localhost:8000/ServiceImpl")); if (service.NotifyClient()) { //CallBack initialization IClientCallBack callback = new ClientImpl(); InstanceContext callbackInstance = new InstanceContext(new ServiceHost(typeof(IClientCallBack)), callback); } Console.ReadLine(); } }

public class ClientImpl:IClientCallBack { public string GetClientName() { return "OK"; } }

我的房东:

[ServiceContract(CallbackContract=typeof(IClientCallBack))] public interface IService { [OperationContract] bool NotifyClient(); } public interface IClientCallBack { [OperationContract] string GetClientName(); }

public class ServiceImpl:IService { public bool NotifyClient() { return true; } }

class Program { static void Main(string[] args) { using (ServiceHost host = new ServiceHost(typeof(ServiceImpl))) { host.AddServiceEndpoint(typeof(IService), new WSDualHttpBinding(), "localhost:8000/ServiceImpl"); host.Open(); Console.WriteLine("Client Is：" + OperationContext.Current.GetCallbackChannel<IClientCallBack>().GetClientName()); Console.ReadLine(); } } }

当我运行Host应用程序时，在带下划线的部分会引发空引用"错误.

When I run Host application, it throws error of "Null reference at the underlined part……

有什么理由吗?

如何解决纯代码……对WCF感到困惑....:(

How to fix in pure codes……puzzled at WCF....:(

推荐答案

Hi

不是使用ServiceHost的专家，但是我会说操作上下文为null，因为客户端尚未连接.当您调用host.Open()时，它将开始侦听以等待客户端连接.

Not an expert in using ServiceHost but I would say that the operation context is null because the client has not yet connected. When you call host.Open() it just starts listening waiting for a client to connect.

如果仅在NotifyClient中包含该行，则应该有一个操作上下文.

If you just include that line inside the NotifyClient, then there should be an operation context available.

此外，我不确定回调初始化是否正确.也许您应该看一下类似msdn.microsoft/zh-CN/magazine/cc163537.aspx

Also, I am not sure if the callback initialization is right. Maybe you should take a look at some example like thismsdn.microsoft/en-us/magazine/cc163537.aspx