定时更新数据

global.asax 里面写
private static Timer timerChangeExpired = new Timer();
protected void Application_Start(object sender, EventArgs e)
{
    // 12 小时触发一次
    timerChangeExpired.Elapsed += new ElapsedEventHandler(timerChangeExpired_Elapsed);
    timerChangeExpired.Interval = 12 * 60 * 60 * 1000 ;
 

    timerChangeExpired.Enabled = true;

    GC.KeepAlive(timerChangeExpired);
}
void timerChangeExpired_Elapsed(object sender, ElapsedEventArgs e)
{
    //自动过期
    try
    {
//定时更新的代码
    }catch(Exception ee)
    {
           
    }
}