C#实现多线程编程的简单案例

class Program
    {
        static void Main(string[] args)
        {
            Thread t1 = new Thread(new ThreadStart(TestMethod));//创建无参数数线程
            Thread t2 = new Thread(new ParameterizedThreadStart(TestMethod));//创建带参数的线程

            //设置为后台进程
            t1.IsBackground = true;
            t2.IsBackground = true;
            t1.Start();
            t2.Start("hello");
            Console.ReadKey();
        }

        public static void TestMethod()
        {
            Console.WriteLine("不带参数的线程函数");
        }

        //参数要定义为object 类型
        public static void TestMethod(object data)
        {
            string datastr = data as string;
            Console.WriteLine("带参数的线程函数，参数为：{0}", datastr);
        }
    }

class Program
    {
        static void Main(string[] args)
        {
            //将工作项加入到线程池队列中，这里可以传递一个线程参数
            ThreadPool.QueueUserWorkItem(TestMethod, "Hello");
            Console.ReadKey();
        }

        //线程函数
        public static void TestMethod(object data)
        {
            string datastr = data as string;
            Console.WriteLine(datastr);
        }
    }

class Program
    {
        static void Main(string[] args)
        {
            Task<Int32> t = new Task<Int32>(n => Sum((Int32)n), 1000);
            t.Start();
            t.Wait();
            Console.WriteLine(t.Result);
            Console.ReadKey();
        }

        private static Int32 Sum(Int32 n)
        {
            Int32 sum = 0;
            for (; n > 0; --n)
                checked{ sum += n;} //结果太大，抛出异常
            return sum;
        }
    }

class Program
    {
        static void Main(string[] args)
        {
            Task<Int32> t = new Task<Int32>(n => Sum((Int32)n), 1000);
            t.Start();
            //t.Wait();
            Task cwt = t.ContinueWith(task => Console.WriteLine("The result is {0}", t.Result));
            Console.ReadKey();
        }

        private static Int32 Sum(Int32 n)
        {
            Int32 sum = 0;
            for (; n > 0; --n)
                checked { sum += n; } //结果溢出，抛出异常
            return sum;
        }
    }

namespace Test
{
    public delegate string MyDelegate(object data);
    class Program
    {
        static void Main(string[] args)
        {
            MyDelegate mydelegate = new MyDelegate(TestMethod);
            IAsyncResult result = mydelegate.BeginInvoke("Thread Param", TestCallback, "Callback Param");

            //异步执行完成
            string resultstr = mydelegate.EndInvoke(result);
        }

        //线程函数
        public static string TestMethod(object data)
        {
            string datastr = data as string;
            Console.WriteLine(datastr);
            return datastr;
        }

        //异步回调函数
        public static void TestCallback(IAsyncResult data)
        {
            Console.WriteLine(data.AsyncState);
        }
    }
}