TimeSpan.FromSeconds給出指定參數的錯誤超出了有效值的範圍。參數名稱：Interval

Question

我在我的WPF應用程序中使用TimeSpan。

var trigger = new TimeTrigger(); 
trigger.Repetition.Interval = TimeSpan.FromSeconds(3.0); 

這是給我一個錯誤：

Specified argument was out of the range of valid values.Parameter name: Interval

我讀過這樣的：https://msdn.microsoft.com/en-us/library/system.timespan.fromseconds(v=vs.110).aspx

我做錯了嗎？

Answer 1

你應該用一個定時器像如下所示： What is the best way to implement a "timer"?

你可以叫你在OnTimerElapsed級事件的方法。

Answer 2

另一種方法是：

// set interval of 3 seconds/3000 msec 
System.Timers.Timer timer = new System.Timers.Timer(3000); 

bool stopTimer = false; 

private void Window_Loaded(object sender, RoutedEventArgs e) 
{ 
    // the timer will restart automatically 
    timer.AutoReset = true; 

    // register the event 
    timer.Elapsed += Timer_Elapsed; 

    // start the timer 
    timer.Start(); 

} 

private void Timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e) 
{ 
    // execute method here 

    // check whether timer can be stopped 
    System.Timers.Timer t = sender as System.Timers.Timer; 
    if (stopTimer) 
    { 
     t.AutoReset = false; 
    } 
}