Async with a Timer

Question

我正在更新我的代碼以使用Async，問題在於Timer.Elapsed需要void返回類型，但這基本上不允許等待，因此代碼不會等待在完成所有事情之前，過早完成。

代碼：

public static void Main(string[] args) 
{ 
    Timer timer; 

    timer = new System.Timers.Timer(); 
    timer.Interval = 3000; 
    timer.Elapsed += OnTimerAsync; 
    timer.Enabled = true; 
    timer.Start(); 

    Console.WriteLine("Press the Enter key to exit the program... "); 
    Console.ReadLine(); 
    Console.WriteLine("Terminating the application..."); 
} 

public async static void OnTimerAsync(object sender, ElapsedEventArgs args) 
{ 
    await ExecuteWorkflowAsync(); 
} 

private async static Task<bool> ExecuteWorkflowAsync() 
{ 
    List<Schedule> schedulesToRun; 

    try 
    { 
     await JobLoader.LoadAsync(schedulesToRun); 
    } 
    catch (Exception ex) 
    { 
     // Log ex 
    } 

    return true; 
} 

是否有使用與異步Timer對象的方法嗎？

Answer 1

試試這個：

public async static void OnTimerAsync(object sender, ElapsedEventArgs args) 
{ 
    timer.Enabled = false; 
    await ExecuteWorkflowAsync(); 
    timer.Enabled = true; 
}