C# 与Console.ReadLine（）相关的RabbitMQ BasicConsume和事件驱动问题

下面的程序基本上是C#Rabbit MQ教程中的Receiver/Worker程序：（添加了一个计数器）

有两三件事让我感到困惑：

1） 如果我注释掉“Console.ReadLine（）”，它将使用队列中的消息并显示：

在最初的几次测试中，我不知道发生了什么

2） 这一行永远不会出现在输出中：Console.WriteLine（“按[enter]退出”）；。大概是因为它在“Console.ReadLine（）；”之前，但是为什么呢？ReadLine事件和BasicConsumer之间的相互作用是什么

3） MQ教程页面说使用CNTL-C停止“侦听器”进程，但我发现只需按enter键也同样有效

我以前为MQSeries编写过线程侦听器，我可能更喜欢线程，但我只是想了解提供的基本教程

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
using RabbitMQ.Client;
using RabbitMQ.Client.Events;

namespace RabbitMQReceiver
{
    class Receive
    {
        public static void Main(string[] args)
        {
            var factory = new ConnectionFactory() { HostName = "localhost" };
            var myQueuename = "MyQueueName1";
            Console.WriteLine("My Start");


            using (var connection = factory.CreateConnection())
            using (var channel = connection.CreateModel())
            {
                channel.QueueDeclare(queue: myQueuename,
                                     durable: false,
                                     exclusive: false,
                                     autoDelete: false,
                                     arguments: null);

                var consumer = new EventingBasicConsumer(channel);
                int countMessagesProcessed = 0;

                // this chunk of code is passed as parm/variable to BasicConsume Method below to process each item pulled of the Queue 
                consumer.Received += (model, ea) =>
                {
                    var body = ea.Body;
                    var message = Encoding.UTF8.GetString(body);
                    countMessagesProcessed++;
                    Console.WriteLine(" [x] Received {0}", message);
                }

                channel.BasicConsume(queue: myQueuename,
                                     noAck: true,
                                     consumer: consumer);

                Console.WriteLine(" Press [enter] to exit.");  // this line never shows up in output 
                Console.ReadLine();    // if this line is commented out the message are consumed, but no Console.WriteLines appear at all. 
                Console.WriteLine("My End - CountMessagesProcessed=" + countMessagesProcessed);

            }
        }
    }
}

Console.ReadLine（）

在等待输入时暂停程序的执行，这允许RabbitMQ使用的线程在此期间运行。注释掉后，程序执行一直运行到结束并退出，包括RabbitMQ线程

---

是的，您可以键入任何内容，它将停止程序的执行；一旦按下键，程序将继续执行并运行到最后。

使用Thread.Sleep（Timeout.Infinite）而不是Console.ReadLine（），这样主程序（或主线程）就不会立即退出。在Linux上运行netcore rabbitmq对我来说也很有效

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
using RabbitMQ.Client;
using RabbitMQ.Client.Events;

namespace RabbitMQReceiver
{
    class Receive
    {
        public static void Main(string[] args)
        {
            var factory = new ConnectionFactory() { HostName = "localhost" };
            var myQueuename = "MyQueueName1";
            Console.WriteLine("My Start");


            using (var connection = factory.CreateConnection())
            using (var channel = connection.CreateModel())
            {
                channel.QueueDeclare(queue: myQueuename,
                                     durable: false,
                                     exclusive: false,
                                     autoDelete: false,
                                     arguments: null);

                var consumer = new EventingBasicConsumer(channel);
                int countMessagesProcessed = 0;

                // this chunk of code is passed as parm/variable to BasicConsume Method below to process each item pulled of the Queue 
                consumer.Received += (model, ea) =>
                {
                    var body = ea.Body;
                    var message = Encoding.UTF8.GetString(body);
                    countMessagesProcessed++;
                    Console.WriteLine(" [x] Received {0}", message);
                }

                channel.BasicConsume(queue: myQueuename,
                                     noAck: true,
                                     consumer: consumer);

                Console.WriteLine(" Press [enter] to exit.");  // this line never shows up in output 
                Console.ReadLine();    // if this line is commented out the message are consumed, but no Console.WriteLines appear at all. 
                Console.WriteLine("My End - CountMessagesProcessed=" + countMessagesProcessed);

            }
        }
    }
}