NetMQ使用——请求响应模式 Request-Reply

官网：https://netmq.readthedocs.io/en/latest/receiving-sending/

 推荐：https://www.cnblogs.com/Jack-Blog/p/6774902.html

先发送的服务器端

using (NetMQSocket clientSocket = new RequestSocket())
{
Random rd = new Random();
int num = rd.Next(0, 100);
clientSocket.Connect("tcp://127.0.0.1:5555");
while (true)
{
Console.WriteLine(num + ",Please enter your message:");
string message = Console.ReadLine();
clientSocket.SendFrame(num + ":" + message);

string answer = clientSocket.ReceiveFrameString();

Console.WriteLine("Answer from server:{0}", answer);

if (message == "exit")
{
break;
}
}
}

接收方，并返回接收结果

using (NetMQSocket serverSocket = new ResponseSocket())
{
serverSocket.Bind("tcp://127.0.0.1:5555");
while (true)
{
string message1 = serverSocket.ReceiveFrameString();

Console.WriteLine("Receive message :
{0}
", message1);

string[] msg = message1.Split(':');
string message = msg[1];


#region 根据接收到的消息，返回不同的信息
if (message == "Hello")
{
serverSocket.SendFrame("World");
}
else if (message == "ni hao ")
{
serverSocket.SendFrame("你好！");
}
else if (message == "hi")
{
serverSocket.SendFrame("HI");
}
else
{
serverSocket.SendFrame(message);
}
#endregion

if (message == "exit")
{
break;
}
}
}

上述的绑定方法是一一对应的，不能同时开启多个客户端，若想绑定多个客户端，则要改变绑定的方式

   using (NetMQSocket clientSocket = new RequestSocket("@tcp://127.0.0.1:5555"))

  using (NetMQSocket serverSocket = new ResponseSocket(">tcp://127.0.0.1:5555"))