异步委托

一、异步委托第一种使用方式

 

异步调用委托，其实就是使用了一个线程池去执行了委托执行的方法。

 static void Main(string[] args)
        {
            Console.WriteLine("当前主线程：" + Thread.CurrentThread.ManagedThreadId);

            Func<int, int, string> delFunc = new Func<int, int, string>((a, b) => {
                Console.WriteLine("Asynchronous Delegate:"+Thread.CurrentThread.ManagedThreadId);
                return ((a + b).ToString());

            });

           

            IAsyncResult asyncRes= delFunc.BeginInvoke(2,3,null,null);
            

            //string str = delFunc(1, 2);
            //Console.WriteLine(str);

            Console.ReadKey();
        }

二、异步委托第二种使用方式

 static void Main(string[] args)
        {
            Console.WriteLine("当前主线程：" + Thread.CurrentThread.ManagedThreadId);

            Func<int, int, string> delFunc = new Func<int, int, string>((a, b) => {
                Console.WriteLine("Asynchronous Delegate:"+Thread.CurrentThread.ManagedThreadId);
                Thread.Sleep(3000);
                return ((a + b).ToString());

            });

           

            IAsyncResult asyncRes= delFunc.BeginInvoke(2,3,null,null);//异步调用委托

            //EndInvoke会阻塞当前的线程，直到异步委托指向完成之后，才能继续往下执行。
            string str =delFunc.EndInvoke(asyncRes);
            Console.WriteLine(str);


            //string str = delFunc(1, 2);同步调用委托
            //Console.WriteLine(str);

            Console.ReadKey();
        }