c#多線程thread實例詳解

1. Thread線程啟動

由於ThreadStart是一個委托，所以可以簡化寫法

        static void Main(string[] args)
        {
            Console.WriteLine("----------主程序開始，線程ID是{0}-----------------", Thread.CurrentThread.ManagedThreadId);

            for(int i = 0;i< 5;i++)
            {
                ThreadStart method = () => TestThread("無參數");
                Thread thread = new Thread(method);
                thread.Start();
            }

            Console.WriteLine("----------主程序結束，線程ID是{0}-----------------", Thread.CurrentThread.ManagedThreadId);

            Console.Read();
        }

        static void TestThread(string name)
        {
            Console.WriteLine("TestThread Start name:{0} 當前線程id:{1} 當前時間:{2}", name, Thread.CurrentThread.ManagedThreadId, DateTime.Now.ToString());

            long sum = 0;

            for (int i = 0; i < 10000000; i++)
            {
                sum += i;
            }
            Console.WriteLine("TestThread End name:{0} 當前線程id:{1} 當前時間:{2}", name, Thread.CurrentThread.ManagedThreadId, DateTime.Now.ToString());
        }

2. Thread線程傳遞參數

上面的例子沒專遞沒有參數的，現在開始傳遞參數

public delegate void ParameterizedThreadStart(object obj);

這個是Thread可以傳遞參數的方法委托，使用這個委托，可以傳遞參數。

        static void Main(string[] args)
        {
            Console.WriteLine("----------主程序開始，線程ID是{0}-----------------", Thread.CurrentThread.ManagedThreadId);

            for(int i = 0;i< 5;i++)
            {
                ParameterizedThreadStart method = o => TestThread(o.ToString());
                Thread thread = new Thread(method);
                thread.Start("param" + i);
            }

            Console.WriteLine("----------主程序結束，線程ID是{0}-----------------", Thread.CurrentThread.ManagedThreadId);

            Console.Read();
        }

        static void TestThread(string name)
        {
            Console.WriteLine("TestThread Start name:{0} 當前線程id:{1} 當前時間:{2}", name, Thread.CurrentThread.ManagedThreadId, DateTime.Now.ToString());

            long sum = 0;

            for (int i = 0; i < 10000000; i++)
            {
                sum += i;
            }
            Console.WriteLine("TestThread End name:{0} 當前線程id:{1} 當前時間:{2}", name, Thread.CurrentThread.ManagedThreadId, DateTime.Now.ToString());
        }

3. Thread線程等待

有時候，主線程需要等待子線程執行完后在執行，Thread的線程等待我們使用join()來實現

        static void Main(string[] args)
        {
            Console.WriteLine("----------主程序開始，線程ID是{0}-----------------", Thread.CurrentThread.ManagedThreadId);

            List<Thread> list = new List<Thread>();
            for(int i = 0;i< 5;i++)
            {
                ParameterizedThreadStart method = o => TestThread(o.ToString());
                Thread thread = new Thread(method);
                thread.Start("param" + i);
                list.Add(thread);
            }
            foreach (var t in list)
            {
                t.Join();
            }
            Console.WriteLine("----------主程序結束，線程ID是{0}-----------------", Thread.CurrentThread.ManagedThreadId);

            Console.Read();
        }

        static void TestThread(string name)
        {
            Console.WriteLine("TestThread Start name:{0} 當前線程id:{1} 當前時間:{2}", name, Thread.CurrentThread.ManagedThreadId, DateTime.Now.ToString());

            long sum = 0;

            for (int i = 0; i < 10000000; i++)
            {
                sum += i;
            }
            Console.WriteLine("TestThread End name:{0} 當前線程id:{1} 當前時間:{2}", name, Thread.CurrentThread.ManagedThreadId, DateTime.Now.ToString());
        }

4. Thread線程獲取返回值

Thread沒發獲取返回值，請注意

5. Thread線程回調

Thread沒有回調，我們自定義一個回調

        private void ThreadCallBack(ThreadStart method, Action callback)
        {
            ThreadStart threadStart = () =>
            {
                method.Invoke();
                callback.Invoke();
            };
            Thread thread = new Thread(threadStart);
            thread.Start();
        }