需求，程序每20秒自动请求接口抓取数据

解决方式：

在程序根目录下的Global.asax.cs下编写



using System.Threading;

using System.Timers;

/// <summary>
        /// 启动应用程序
        /// </summary>
        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            //// 启动的时候清除全部缓存
            ////定时器
            userIBLL.SaveLog("应用程序启动", "Application_Start");
            System.Timers.Timer aTimer = new System.Timers.Timer();
            aTimer.Elapsed += new ElapsedEventHandler(getMessages);
            //aTimer.AutoReset = true;
            aTimer.Interval = 20000;
            aTimer.Enabled = true;
            aTimer.Start();
            userIBLL.SaveLog("应用程序启动", "2");
        }


　



protected void Application_End(object sender, EventArgs e)
        {
            userIBLL.SaveLog("自动回收", "重新执行");
            //下面的代码是关键，可解决IIS应用程序池自动回收的问题  
            Thread.Sleep(1000);
            HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(需要重新启动程序的地址);
            HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();
            Stream receiveStream = myHttpWebResponse.GetResponseStream();//得到回写的字节流  
        }
        protected void Application_Error(object sender, EventArgs e)
        {
            //重新启动应用程序

            var lastError = Server.GetLastError();

        }
        private void getMessages(object source, ElapsedEventArgs e)
        {
            try
            {

                写入需要执行的程序
            }
            catch (Exception ex)
            {
                //打log日志
            }
        }