Question

我需要一种方法，每隔15秒使用C＃定期检查一些请求的状态。我将使用Xamarin.Forms，如果我不必编写任何特定于平台的代码，那就太好了。

我需要每15秒检查一次状态两分钟。如果请求被拒绝或被接受，我需要检查停止并运行一些其他代码。这样做的最佳方法是什么？

Answer 1

基本上，创建计时器可以做到这一点。这是一个关于如何每15秒检查一次请求2分钟的示例。

int twoMinutesCounter = 1; // the value that will reach 120 seconds; 2 minutes = 120 seconds
int fifteenSeconds = 15; // obvious
int secondsElapsed = 1;
// create a timer that ticks every 1 second
DispatcherTimer theTimer = new Timer();
theTimer.Interval = new Timespand(0,0,0,1); // days, hours, minutes, seconds
// the elapse event. here put your request checking
theTimer.Elapsed += (_, __) => 
{
   // if its 2 minutes then stop the timer
   if (twoMinutesCounter >= 120) 
   {
      // stop the timer to stop checking
      theTimer.Stop();
   }
   // check if its 15 seconds
   if (secondsElapsed >= fifteenSeconds) 
   {
     // here, request to check the status
     // do the checking

     // reset the seconds elapse to check again for 15 seconds
     secondsElapsed = 1;
   }
   secondsElapsed++; // increase seconds elapse
   twoMinutesCounter++; // increase the two minutes counter every seconds
}
// start the timer
theTimer.Start();

定期检查请求状态C＃

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