c# - C#中的同步定时器回调

Question

我想创建一个定期调用的函数（1 秒），该函数可能需要超过 1 秒。如果函数未完成，则不应创建新线程。如果它完成，它应该等到适当的时间。哪种计时器方法将是 C# 中的最佳解决方案？

Answer 1

使用 Microsoft 的响应式扩展 (NuGet "Rx-Main")，您可以执行以下操作：

Observable
    .Interval(TimeSpan.FromSeconds(1.0))
    .Subscribe(n =>
    {
        /* Do work here */
    });

它等待订阅调用之间的间隔。

Answer 2

Timer timer = new Timer();//Create new instance of "Timer" class.
timer.Interval = 1000;//Set the interval to 1000 milliseconds (1 second).
bool started = false;//Set the default value of "started" to false;
timer.Tick += (sender, e) =>//Set the procedure that occurs each second.
{
    if (!started)//If the value of "started" is false (if it isn't running in another thread).
    {
        started = true;//Set "started" to true to ensure that this code isn't run in another thread.
        //Other code to be run.
        started = false;//Set "started" to false so that the code can be run in the next thread.
    }
};
timer.Enabled = true;//Start the timer.