JS Async Callback

AsyncCallback

意义:

异步操作完成时调用的方法

语法1:

构造异步回调对象

AsyncCallback 异步回调对象名asyncCallback = new AsyncCallback(异步操作完成时调用的方法MyAsyncCallback);

 

语法2:

定义委托,并进行异步调用,异步调用完成后自动触发

委托类型Action fn委托名 = Run委托定义;
委托名fn.BeginInvoke(异步回调对象名asyncCallback );

 

示例:

复制代码
using System;

namespace Examples.AdvancedProgramming.AsynchronousOperations
{
    public class UseDelegateForAsyncCallback
    {
        delegate string MethodDelegate(int iCallTime);
        public static void Main()
        {
            MethodDelegate dlgt = (m)=> 
            {
                return "你输入的数字是"+m;
            };
            AsyncCallback asyncCallback = new AsyncCallback(MyAsyncCallback);           
            Action fn = Run;
            fn.BeginInvoke(asyncCallback,null);

        }

        private static void MyAsyncCallback(IAsyncResult ar)
        {
            Console.WriteLine("异步调用");
            Console.ReadLine();
        }


        public static void Run()
        {

        }
    }
}
///  控制台输出结果:
///     你输入的数字是:5
///     异步调用

来自:https://www.cnblogs.com/licin/p/8274405.html
posted @ 2018-12-02 18:44  维尼,小熊  阅读(472)  评论(0编辑  收藏  举报