C#多线程的用法3-线程间的协作Join

在创建多线程应用程序时，如何确保线程间的协作往往比让线程工作更重要。

线程间的协作最简单的方式是采用Join来进行，如下：

/// <summary>
        /// 多线程协作-Join方式
        /// 解决线程间同步工作问题
        /// </summary>
        private static void MultiThreadSynergicWithJoin()
        {
            int[] array = new int[3];
            Thread producer = null, customer = null;
            producer = new Thread(() =>
            {
                Console.WriteLine(String.Format("{0} start work", Thread.CurrentThread.Name));
                Random random = new Random();
                try
                {
                    array[0] = random.Next(10);
                    array[1] = random.Next(10);
                    array[2] = random.Next(10);
                    Console.WriteLine(String.Format("{0} work over", Thread.CurrentThread.Name));
                    Thread.Sleep(1000);
                }
                catch (ThreadAbortException ex)
                {
                    Console.WriteLine(String.Format("Sub Thread {0} Abort", Thread.CurrentThread.Name));
                }
            })
            {
                Name = "producer"
            };
            customer = new Thread(() =>
            {
                Console.WriteLine(String.Format("{0} start work", Thread.CurrentThread.Name));
               
                try
                {
                    producer.Join();
                    Console.WriteLine(array[0]);
                    Console.WriteLine(array[1]);
                    Console.WriteLine(array[2]);
                    Console.WriteLine(String.Format("{0} work over", Thread.CurrentThread.Name));
                }
                catch (ThreadInterruptedException ex)
                {
                    Console.WriteLine(String.Format("Sub Thread {0} Interrupted", Thread.CurrentThread.Name));
                }
            })
            {
                Name = "customer"
            };

            Console.WriteLine("Main Thread");
            customer.Start();
            producer.Start();

            Console.WriteLine("Main Thread Wait Sub Thread");
            
        }

说明：

1、在调用producer.Join()时，customer线程将暂停执行而进入等待producer线程执行的过程。在producer线程执行完毕后，customer线程才返回继续执行后续代码。

2、producer与customer谁先启动无所谓，但应保证在调用producer.Join时满足：producer线程必须启动过，即调用过Start方法，如果在调用Join时，被调用线程已经结束或终止，Join方法将立即返回执行后续代码

3、对于多线程间的协作Join方式较为适合线程数量不多，对资源需求有明确先后顺序的情况（个人总结，如有错误，欢迎拍砖）。