【C#网络编程】NetMQ使用演示实例（一）|附ZeroMQ（C++）电子书下载地址

时间：2023-04-28

ZeroMQ（Ø）是一个轻量级的消息内核，它是对标准socket接口的扩展。它提供了一种异步消息队列，多消息模式，消息过滤（订阅），对多种传输协议的无缝访问。

ZeroMQ是基于消息队列的多线程网络库，其对套接字类型、连接处理、帧、甚至路由的底层细节进行抽象，提供跨越多种传输协议的套接字。ZeroMQ是网络通信中新的一层，介于应用层和传输层之间（按照TCP/IP划分），其是一个可伸缩层，可并行运行，分散在分布式系统间。

ZeroMQ几乎所有的I/O操作都是异步的，主线程不会被阻塞。ZeroMQ会根据用户调用zmq_init函数时传入的接口参数，创建对应数量的I/O Thread。

ZeroMQ不是单独的服务或者程序，仅仅是一套组件，其封装了网络通信、消息队列、线程调度等功能，向上层提供简洁的API，应用程序通过加载库文件，调用API函数来实现高性能网络通信。

ZeroMQ将消息通信分成4种模型，分别是

一对一结对模型（Exclusive-Pair）：一个TCP Connection，但是TCP Server只能接受一个连接，数据可以双向流动

请求回应模型（Request-Reply）：跟一对一结对模型的区别在于请求端可以是1~N个，该模型主要用于远程调用及任务分配等

发布订阅模型（Publish-Subscribe）：发布端单向分发数据，且不关心是否把全部信息发送给订阅端。如果发布端开始发布信息时，订阅端尚未连接上来，则这些信息会被直接丢弃。订阅端未连接导致信息丢失的问题，可以通过与请求回应模型组合来解决。订阅端只负责接收，而不能反馈，且在订阅端消费速度慢于发布端的情况下，会在订阅端堆积数据。该模型主要用于数据分发。天气预报、微博明星粉丝可以应用这种经典模型。

推拉模型（Push-Pull）：Server端作为Push端，而Client端作为Pull端，如果有多个Client端同时连接到Server端，则Server端会在内部做一个负载均衡，采用平均分配的算法，将所有消息均衡发布到Client端上。与发布订阅模型相比，推拉模型在没有消费者的情况下，发布的消息不会被消耗掉；在消费者能力不够的情况下，能够提供多消费者并行消费解决方案。该模型主要用于多任务并行。

请求响应模型

发布订阅模型

推拉模型

异步请求响应

实例1-

namespace HelloWorldDemoSeparateThreads

输出结果

视频演示

#主程序 public class Program { public static void Main(string[] args) { Server server = new Server();//服务器 server.Run();//运行服务器 foreach (Client client in Enumerable.Range(0, 5).Select( x => new Client(string.Format("client {0}", x)))) //创建5个客户端线程 { client.Run();//运行每个客户端 } Console.ReadLine(); } }

#客户端类 sealed class Client { private readonly string clientName;//私有只读字段 public Client(string clientName)//客户端构造函数：客户端名 { this.clientName = clientName; } public void Run() { Task.Run(() => { using (NetMQContext ctx = NetMQContext.Create())//零消息队列上下文 { using (var client = ctx.CreateRequestSocket())//创建请求套接字客户端 { client.Connect("tcp://127.0.0.1:5556");//客户端连接服务器IP和端口 while (true) { client.Send(string.Format("Hello from client {0}", clientName));//客户端发送：客户端名 string fromServerMessage = client.ReceiveString();//客户端接收服务器发来的字符串：阻塞线程 Console.WriteLine("From Server: {0} running on ThreadId : {1}", fromServerMessage, Thread.CurrentThread.ManagedThreadId);// 一个整数，表示此托管线程的唯一标识符。 Thread.Sleep(5000);//等5秒 } } } }); } }

#服务器类 sealed class Server //服务器类 { public void Run() { Task.Run(() => { using (NetMQContext ctx = NetMQContext.Create())//零消息队列上下文 { using (var server = ctx.CreateResponseSocket())//创建响应套接字 { server.Bind("tcp://127.0.0.1:5556");//绑定IP 端口 while (true) { string fromClientMessage = server.ReceiveString();//从客户端接收字符串，阻塞线程 Console.WriteLine("From Client: {0} running on ThreadId : {1}", fromClientMessage, Thread.CurrentThread.ManagedThreadId);//显示接收内容和当前线程的主线程ID server.Send("Hi Back");//发送给客户端 } } } }); } }

实例2-SendMore 测试

[TestFixture]//测试装置表示执行一项或多项测试所需的准备工作，以及任何相关的清理操作。例如，这可能涉及创建临时或代理数据库、目录或启动服务器进程。 public class SendMoreTests { [Test] public void SendMoreTest() { using (NetMQContext ctx = NetMQContext.Create()) { using (var server = ctx.CreateResponseSocket())//服务器：响应套接字 { server.Bind("tcp://127.0.0.1:5556"); using (var client = ctx.CreateRequestSocket())//客户端：请求套接字 { client.Connect("tcp://127.0.0.1:5556"); //客户端发消息 client.SendMore("A");//字符串+bool变量dontWait默认false client.Send("Hello"); //server receive 1st part服务器端接收第一部分 bool more; string m = server.ReceiveString(out more); Assert.AreEqual("A", m);//判断接收的第一部分是否为“A” Assert.IsTrue(more);//判断是否为sendmore方法 //server receive 2nd part接收第二部分 string m2 = server.ReceiveString(out more); Assert.AreEqual("Hello", m2);//判断接收数据是否为Hello Assert.False(more);//send方法 //server send message, this time use NetMqMessage //which will be sent as frames if the client calls //ReceieveMessage() //服务器发送消息，这次使用 NetMqMessage，如果客户端调用 ReceieveMessage()，它将作为NetMQframes发送 var m3 = new NetMQMessage();//消息 m3.Append("From"); m3.Append("Server"); server.SendMessage(m3);//发送消息 //client receive客户端接收消息 var m4 = client.ReceiveMessage(); Assert.AreEqual(2, m4.frameCount);//判断帧数据量 Assert.AreEqual("From", m4[0].ConvertToString());// 第一个NetMQframe 是否为Form Assert.AreEqual("Server", m4[1].ConvertToString());// 第一个NetMQframe 是否为Server } } } } }

实例3-ZeroMqIdentity 标识符

视频演示

using System;using System.Collections.Generic;using System.Threading;using System.Threading.Tasks;using Microsoft.SqlServer.Server;using NetMQ;using NetMQ.Sockets;namespace ZeroMqIdentity{ public class Program : IDisposable//一个标准的释放非托管资源的类应该去实现IDisposable接口 { private List clients = new List();//请求套接字客户端列表 public void Run() { using (NetMQContext ctx = NetMQContext.Create())//零消息队列上下文 { using (var server = ctx.CreateRouterSocket())//创建路由器套接字服务器 { server.Bind("tcp://127.0.0.1:5556");//服务器绑定端口 //客户端创建后发送字符串给服务器，然后开始接收服务器返回的字符串 CreateClient(ctx, "A_"); CreateClient(ctx, "B_"); CreateClient(ctx, "C_"); CreateClient(ctx, "D_"); while (true) { var clientMessage = server.ReceiveMessage(); //服务器接收一个客户端消息 Console.WriteLine("========================"); Console.WriteLine(" INCOMING CLIENT MESSAGE "); Console.WriteLine("========================"); for (int i = 0; i < clientMessage.frameCount; i++)//遍历接收到的某客户端发来的消息帧 {//first frame(随机) ,empty frame（空）, last frame （客户端发来的） Console.WriteLine("frame[{0}] = {1}", i, clientMessage[i].ConvertToString());//第i帧……内容 } var clientAddress = clientMessage[0];//获取客户端消息的first frame。客户端的地址 var clientOriginalMessage = clientMessage[2].ConvertToString();//客户端发来消息的真实数据last frame string response = string.Format("{0} back from server", clientOriginalMessage);//服务器响应客户端的字符串 // "B_" client is special if (clientOriginalMessage.StartsWith("B_")) {//B_客户端请求的响应数据有些特别 response = string.Format( "special Message for 'B' back from server"); } var messageToClient = new NetMQMessage();//消息 messageToClient.Append(clientAddress);//客户端地址 messageToClient.AppendEmptyframe();//空帧 messageToClient.Append(response);//响应帧 server.SendMessage(messageToClient);//响应客户端。应该是多个客户端都会发送 } } } Console.ReadLine(); } private static void Main(string[] args) { Program p = new Program(); p.Run(); } //零消息队列上下文创建客户端套接字，传入前缀参数 private void CreateClient(NetMQContext ctx, string prefix) { Task.Run(() => { var client = ctx.CreateRequestSocket();//创建客户端 clients.Add(client);//添加到客户端列表 client.Connect("tcp://127.0.0.1:5556");//连接服务器 client.Send(string.Format("{0}Hello", prefix));//向服务器发送字符串带前缀 //客户端读取消息 var echoedServerMessage = client.ReceiveString(); Console.WriteLine( "rnClient Prefix is : '{0}', Server Message : '{1}'", prefix, echoedServerMessage);//显示回射的服务器消息 }); } public void Dispose() //https://zhuanlan.zhihu.com/p/244894004 { foreach (var client in clients) { client.Dispose(); } } }}

实例4-Poller 轮询器测试

[TestFixture] public class PollerTests //轮询器测试 { [Test] public void SingleSocketPollTest() //单套接字轮训测试 { using (NetMQContext contex = NetMQContext.Create())//零消息队列上下文 { using (var rep = contex.CreateResponseSocket())//创建服务器端响应套接字 { rep.Bind("tcp://127.0.0.1:5002");//绑定地址端口 using (var req = contex.CreateRequestSocket())//创建客户端请求套接字 using (Poller poller = new Poller()) //初始化轮训器 { req.Connect("tcp://127.0.0.1:5002");//客户端连接服务器 //ReceiveReady 事件由轮询器引发 rep.ReceiveReady += (s, a) => //服务器的接收就绪事件：参数 s a:事件参数 {//Response类型的socket也是同步的，与Request的意思差不多，不过顺序是先recv再send bool more; string m = a.Socket.ReceiveString(out more);//接收客户端发来的请求 Assert.False(more);//断言more 为false Assert.AreEqual("Hello", m);//断言接收的字符串为Hello a.Socket.Send("World");//服务端响应请求 }; //rep 接收客户端发来消息Hello，响应World poller.AddSocket(rep);//将服务器套接字添加到轮训器。 Task pollerTask = Task.Factory.StartNew(poller.Start);//启动轮训器开始轮询，引发服务器rep接收就绪事件 //对于Request类型的socket，它是同步的，它一个时刻只能对一个连接进行操作，在一个连接上发送了数据之后， //必须接着在这个连接上执行recv，也就是send与recv必须同时匹配出现 req.Send("Hello");//客户端发送Hello给服务器端 bool more2; string m1 = req.ReceiveString(out more2);//接收服务器端响应的字符串， Assert.IsFalse(more2);//断言more2为false Assert.AreEqual("World", m1);//断言服务器响应数据位World poller.Stop();//停止轮训 Thread.Sleep(100); Assert.IsTrue(pollerTask.IsCompleted);//断言轮训器任务完毕 } } } } //https://blog.csdn.net/zhanghe_zht/article/details/88312442?spm=1001.2014.3001.5502 //在REQ和REP中间加入代理：ROUTER和DEALER [Test] //https://blog.csdn.net/weixin_42784553/article/details/105049576 public void AddSocketDuringWorkTest()//测试工作时添加套接字 { using (NetMQContext contex = NetMQContext.Create())//零消息队列上下文 { // we are using three responses to make sure we actually //move the correct socket and other sockets still work //我们正在使用三个响应来确保我们确实移动了正确的套接字并且其他套接字仍然有效 using (var router = contex.CreateRouterSocket())//创建路由器套接字1 using (var router2 = contex.CreateRouterSocket())//创建路由器套接字2 { //Router类型的socket是异步的，他可以在随时执行recv与send， //而不必在同一时刻必须要强制在某个连接上进行操作，它会根据标志帧来具体的区分应该在哪一个链接上进行操作 router.Bind("tcp://127.0.0.1:5002"); router2.Bind("tcp://127.0.0.1:5003"); //Dealer类型的socket，这个更简单的，异步。。。它基本上就没做啥工作。 using (var dealer = contex.CreateDealerSocket()) using (var dealer2 = contex.CreateDealerSocket()) using (Poller poller = new Poller())//轮训器 { dealer.Connect("tcp://127.0.0.1:5002");//router1---dealer1 dealer2.Connect("tcp://127.0.0.1:5003");//router2---dealer2 bool router1arrived = false; //路由1标志位消息抵达路由1 bool router2arrived = false; bool more; //ReceiveReady 事件由轮询器引发 router2.ReceiveReady += (s, a) =>//路由2接收就绪 { router2.Receive(out more); router2.Receive(out more); router2arrived = true; }; //ReceiveReady 事件由轮询器引发 router.ReceiveReady += (s, a) =>//路由1接收就绪 { router1arrived = true; router.Receive(out more);//路由1接收消息 router.Receive(out more); poller.AddSocket(router2);//路由1接收完毕消息，再引发路由器2的接收就绪事件 }; poller.AddSocket(router);//引发路由1的接收就绪事件 Task task = Task.Factory.StartNew(poller.Start);//开始轮询路由器套接字 dealer.Send("1"); Thread.Sleep(300); dealer2.Send("2"); Thread.Sleep(300); poller.Stop(true); task.Wait();//等待task完成 Assert.IsTrue(router1arrived);// 消息抵达路由1 Assert.IsTrue(router2arrived); } } } } [Test] public void AddSocketAfterRemovingTest() // { using (NetMQContext contex = NetMQContext.Create()) //创建零消息队列上下文 { // we are using three responses to make sure we actually //move the correct socket and other sockets still work //我们正在使用三个响应来确保我们确实移动了正确的套接字并且其他套接字仍然有效 using (var router = contex.CreateRouterSocket()) using (var router2 = contex.CreateRouterSocket()) using (var router3 = contex.CreateRouterSocket()) { router.Bind("tcp://127.0.0.1:5002"); router2.Bind("tcp://127.0.0.1:5003"); router3.Bind("tcp://127.0.0.1:5004"); using (var dealer = contex.CreateDealerSocket()) using (var dealer2 = contex.CreateDealerSocket()) using (var dealer3 = contex.CreateDealerSocket()) using (Poller poller = new Poller()) { dealer.Connect("tcp://127.0.0.1:5002"); dealer2.Connect("tcp://127.0.0.1:5003"); dealer3.Connect("tcp://127.0.0.1:5004"); bool router1arrived = false; bool router2arrived = false; bool router3arrived = false; bool more; //The ReceiveReady event is raised by the Poller router.ReceiveReady += (s, a) => { router1arrived = true; router.Receive(out more); router.Receive(out more); poller.RemoveSocket(router);//轮训器引发路由器接收就绪事件后，从轮训器移除 }; poller.AddSocket(router);//添加路由器套接字到轮训器 //The ReceiveReady event is raised by the Poller router3.ReceiveReady += (s, a) => { router3.Receive(out more); router3.Receive(out more); router3arrived = true; }; //The ReceiveReady event is raised by the Poller router2.ReceiveReady += (s, a) => { router2arrived = true; router2.Receive(out more); router2.Receive(out more); poller.AddSocket(router3); }; poller.AddSocket(router2); Task task = Task.Factory.StartNew(poller.Start); dealer.Send("1"); Thread.Sleep(300); dealer2.Send("2"); Thread.Sleep(300); dealer3.Send("3"); Thread.Sleep(300); poller.Stop(true); task.Wait(); Assert.IsTrue(router1arrived); Assert.IsTrue(router2arrived); Assert.IsTrue(router3arrived); } } } } [Test] public void AddTwoSocketAfterRemovingTest() { using (NetMQContext contex = NetMQContext.Create()) { // we are using three responses to make sure we actually //move the correct socket and other sockets still work using (var router = contex.CreateRouterSocket()) using (var router2 = contex.CreateRouterSocket()) using (var router3 = contex.CreateRouterSocket()) using (var router4 = contex.CreateRouterSocket()) { router.Bind("tcp://127.0.0.1:5002"); router2.Bind("tcp://127.0.0.1:5003"); router3.Bind("tcp://127.0.0.1:5004"); router4.Bind("tcp://127.0.0.1:5005"); using (var dealer = contex.CreateDealerSocket()) using (var dealer2 = contex.CreateDealerSocket()) using (var dealer3 = contex.CreateDealerSocket()) using (var dealer4 = contex.CreateDealerSocket()) using (Poller poller = new Poller()) { dealer.Connect("tcp://127.0.0.1:5002"); dealer2.Connect("tcp://127.0.0.1:5003"); dealer3.Connect("tcp://127.0.0.1:5004"); dealer4.Connect("tcp://127.0.0.1:5005"); int router1arrived = 0; int router2arrived = 0; bool router3arrived = false; bool router4arrived = false; bool more; //The ReceiveReady event is raised by the Poller router.ReceiveReady += (s, a) => { router1arrived++; //运行路由器套接字的次数 router.Receive(out more); router.Receive(out more); poller.RemoveSocket(router);//运行后移除 }; poller.AddSocket(router); //The ReceiveReady event is raised by the Poller router3.ReceiveReady += (s, a) => { router3.Receive(out more); router3.Receive(out more); router3arrived = true; }; //The ReceiveReady event is raised by the Poller router4.ReceiveReady += (s, a) => { router4.Receive(out more); router4.Receive(out more); router4arrived = true; }; //The ReceiveReady event is raised by the Poller router2.ReceiveReady += (s, a) => { router2arrived++; router2.Receive(out more); router2.Receive(out more); if (router2arrived == 1) { poller.AddSocket(router3); poller.AddSocket(router4); } }; poller.AddSocket(router2); Task task = Task.Factory.StartNew(poller.Start); dealer.Send("1"); Thread.Sleep(300); dealer2.Send("2"); Thread.Sleep(300); dealer3.Send("3"); dealer4.Send("4"); dealer2.Send("2"); dealer.Send("1"); Thread.Sleep(300);//停止轮训前确保轮询任务执行完毕 poller.Stop(true);//停止轮询 task.Wait(); router.Receive(true, out more);// Assert.IsTrue(more); router.Receive(true, out more);// Assert.IsFalse(more); Assert.AreEqual(1, router1arrived); Assert.AreEqual(2, router2arrived);//路由器2接收事件执行了两次 Assert.IsTrue(router3arrived); Assert.IsTrue(router4arrived); } } } } [Test] public void CancelSocketTest() //取消套接字测试 { using (NetMQContext contex = NetMQContext.Create()) { // 我们正在使用三个响应来确保我们确实移动了正确的套接字并且其他套接字仍然有效 using (var router = contex.CreateRouterSocket()) using (var router2 = contex.CreateRouterSocket()) using (var router3 = contex.CreateRouterSocket()) { router.Bind("tcp://127.0.0.1:5002"); router2.Bind("tcp://127.0.0.1:5003"); router3.Bind("tcp://127.0.0.1:5004"); using (var dealer = contex.CreateDealerSocket()) using (var dealer2 = contex.CreateDealerSocket()) using (var dealer3 = contex.CreateDealerSocket()) using (Poller poller = new Poller()) { dealer.Connect("tcp://127.0.0.1:5002"); dealer2.Connect("tcp://127.0.0.1:5003"); dealer3.Connect("tcp://127.0.0.1:5004"); bool first = true; //The ReceiveReady event is raised by the Poller router2.ReceiveReady += (s, a) => { bool more; // identity 标识 byte[] identity = a.Socket.Receive(out more);//路由器2 套接字接收字节数组 // message消息 a.Socket.Receive(out more);//接收 a.Socket.SendMore(identity);//发送标识 a.Socket.Send("2");//发送数据 }; poller.AddSocket(router2); //ReceiveReady 事件由轮询器引发 router.ReceiveReady += (s, a) => { if (!first) { Assert.Fail("This should happen because we cancelled the socket"); } first = false; bool more; // identity 标识 a.Socket.Receive(out more); string m = a.Socket.ReceiveString(out more);//数据 Assert.False(more);//断言为 false Assert.AreEqual("Hello", m); //断言接收的数据位Hello //取消套接字 cancelling the socket poller.RemoveSocket(a.Socket);//移除router 套接字。取消套接字：之后不会再触发该路由器套接字的准备就绪事件 }; poller.AddSocket(router); //The ReceiveReady event is raised by the Poller router3.ReceiveReady += (s, a) => { bool more; // identity byte[] identity = a.Socket.Receive(out more); // message a.Socket.Receive(out more); a.Socket.SendMore(identity).Send("3"); }; poller.AddSocket(router3); Task pollerTask = Task.Factory.StartNew(poller.Start);//启动轮询路由器任务 dealer.Send("Hello"); // sending this should not arrive on the poller, //therefore response for this will never arrive dealer.Send("Hello2"); Thread.Sleep(100); // sending this should not arrive on the poller, //therefore response for this will never arrive dealer.Send("Hello3");//发送这个不应该到达轮询器，因此对此的响应永远不会到达 Thread.Sleep(500); bool more2; // 确保在取消之前定义的套接字仍然有效 dealer2.Send("1"); string msg = dealer2.ReceiveString(out more2); Assert.AreEqual("2", msg); // making sure the socket defined after the one cancelled still works dealer3.Send("1"); msg = dealer3.ReceiveString(out more2); Assert.AreEqual("3", msg); // we have to give this some time if we want to make sure //it's really not happening and it not only because of time //如果我们想确保它真的没有发生，我们必须给它一些时间，这不仅仅是因为时间 Thread.Sleep(300); poller.Stop();//停止轮训器任务 Thread.Sleep(100); Assert.IsTrue(pollerTask.IsCompleted);//断言轮训器poller 任务执行完毕 } } } } }

实例5-ConcurrentQueueDemo 并发队列演示

输出结果

public class Program { public void Run() { //NOTES //1、Use many threads each writing to ConcurrentQueue //2、Extra thread to read from ConcurrentQueue, and this is the one that // will deal with writing to the server //1、使用多个线程，每个线程都写入 ConcurrentQueue并发队列 //2。从 ConcurrentQueue 读取的额外线程，这是处理写入服务器的线程 ConcurrentQueue messages = new ConcurrentQueue();// 表示线程安全的先进先出 (FIFO) 集合。 int delay = 3000;//时延 3秒 Poller poller = new Poller();//轮训器 using (NetMQContext ctx = NetMQContext.Create()) //创建零消息队列的上下文 { using (var server = ctx.CreateRouterSocket())//创建路由套接字服务器端 { server.Bind("tcp://127.0.0.1:5556");//绑定服务器地址端口 //start some threads, where each thread, will use a client side //broker (simple thread that monitors a CooncurrentQueue), where //onLY the client side broker talks to the server //启动3个线程，每个线程将使用客户端代理（监控 CooncurrentQueue 的简单线程），其中只有客户端代理与服务器对话 for (int i = 0; i < 3; i++) { Task.Factory.StartNew((state) =>//开启三个线程，每个线程都不断的把字符串string.Format("client {0}", i)添加到消息队列 { while (true) { messages.Enqueue(state.ToString()); Thread.Sleep(delay);//三秒写入并发队列一次。三个客户端，总共一秒写入一次消息到并发队列 } }, string.Format("client {0}", i), TaskCreationOptions.LongRunning);//任务时长时间运行的 }//三个线程填充消息队列 //单个发送者循环 Task.Factory.StartNew((state) => { var client = ctx.CreateDealerSocket(); //创建客户端经销商套接字 client.Connect("tcp://127.0.0.1:5556"); client.ReceiveReady += Client_ReceiveReady;//绑定套接字准备就绪事件处理函数 poller.AddSocket(client);//客户端套接字添加到轮询器 while (true) { string clientMessage = null; if (messages.TryDequeue(out clientMessage)) //尝试移除并返回并发队列开头处的对象。 { var messageToServer = new NetMQMessage();//创建要发送给服务器的消息 messageToServer.AppendEmptyframe();//空帧 messageToServer.Append(clientMessage);//取出的并发队列字符串 client.SendMessage(messageToServer);//发送给服务器, 一般三帧。地址+空帧+字符串。如果从并发队列取出的消息为空，则为地址帧+空帧 } } }, TaskCreationOptions.LongRunning); //开启轮询器 Task task = Task.Factory.StartNew(poller.Start);//处理客户端接收数据 //服务器主循环 while (true) { var clientMessage = server.ReceiveMessage();//接收客户端发来的并发队列消息 Console.WriteLine("========================"); Console.WriteLine(" INCOMING CLIENT MESSAGE "); Console.WriteLine("========================"); for (int i = 0; i < clientMessage.frameCount; i++)// {//三行三帧。地址+空帧+字符串 Console.WriteLine("frame[{0}] = {1}", i, clientMessage[i].ConvertToString()); } if (clientMessage.frameCount == 3) {//first frame,empty frame, last frame var clientAddress = clientMessage[0];//客户端发来消息的地址 var clientOriginalMessage = clientMessage[2].ConvertToString();//last frame string response = string.Format("{0} back from server {1}", clientOriginalMessage, DateTime.Now.ToLongTimeString());//REPLY client i back from server 19:38:03 var messageToClient = new NetMQMessage(); messageToClient.Append(clientAddress); messageToClient.AppendEmptyframe(); messageToClient.Append(response); server.SendMessage(messageToClient);//反馈给客户端的消息 } } } } } //客户端接收事件：接收服务器发来的消息（三帧），并显示 void Client_ReceiveReady(object sender, NetMQSocketEventArgs e) { bool hasmore = false; e.Socket.Receive(out hasmore);//接收一帧。 if (hasmore)//多于一帧，第一帧为空，第二帧为数据 { string result = e.Socket.ReceiveString(out hasmore);//再次接收字符串 Console.WriteLine("REPLY " + result); //REPLY client 0 back from server 19:38:03 } } [STAThread] public static void Main(string[] args) { Program p = new Program(); p.Run(); } }

参考：

https://netmq.readthedocs.io/en/latest/ NetMQ官方文档

https://github.com/zeromq/netmq 官方源码

https://zguide.zeromq.org/

https://www.cnblogs.com/peterYong/p/11157298.html

https://www.cnblogs.com/rainbowzc/p/3357594.html

https://ssup2.github.io/theory_analysis/ZeroMQ/

https://blog.csdn.net/u011285477/article/details/100688003?spm=1001.2014.3001.5502

https://blog.csdn.net/tjcwt2011/article/details/81542944

电子书下载：

「ZeroMQ」https://www.aliyundrive.com/s/RGPoWUWrjn6 点击链接保存，或者复制本段内容，打开「阿里云盘」APP ，无需下载极速在线查看，视频原画倍速播放。

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