在 C# 中使用计时器进行定期检查事件？

Question

亲爱的兄弟们，我是新手，我正在使用 XML 作为数据库，我想使用 C# 中的 Timer 控件检索每 10 秒将数据提取到我的标签控件的方法。

For Instance 检索数据和定时器控件的方法是：

private void timer1_Tick(object sender, EventArgs e)
        {
          //here how can I run this method at every 10 seconds  
                    ReturnUknowns();
        }

Answer 1

如果您在创建计时器时遇到问题。要每 10 秒执行一次此功能，您需要在创建计时器时指定滴答周期。

Timer timer = new Timer(10000); // 10 seconds in miliseconds
timer.Tick += timer1_Tick;

以及您需要设置的地方

timer.Start()

private void timer1_Tick(object sender, EventArgs e)
{
           //here how can I run this method at every 10 seconds  
           ReturnUknowns();
}

然后每 10 秒将调用函数 timer1_Tick() 并在其中指定所有函数。 timer.Tick 可能有不同的名称，具体取决于您所从事的项目类型。

Answer 2

这是您可以测试从 2 秒间隔中删除注释的代码，理解起来很有意义...

 public class Timer1
    {
        private static System.Timers.Timer aTimer;

        public static void Main()
        {
            // Normally, the timer is declared at the class level, 
            // so that it stays in scope as long as it is needed. 
            // If the timer is declared in a long-running method,   
            // KeepAlive must be used to prevent the JIT compiler  
            // from allowing aggressive garbage collection to occur  
            // before the method ends. You can experiment with this 
            // by commenting out the class-level declaration and  
            // uncommenting the declaration below; then uncomment 
            // the GC.KeepAlive(aTimer) at the end of the method. 
            //System.Timers.Timer aTimer; 

            // Create a timer with a ten second interval.
            aTimer = new System.Timers.Timer(10000);

            // Hook up the Elapsed event for the timer.
            aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);

            // Set the Interval to 2 seconds (2000 milliseconds).
            //aTimer.Interval = 2000;
            aTimer.Enabled = true;

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

            // If the timer is declared in a long-running method, use 
            // KeepAlive to prevent garbage collection from occurring 
            // before the method ends. 
            //GC.KeepAlive(aTimer);
        }

        // Specify what you want to happen when the Elapsed event is  
        // raised. 
        private static void OnTimedEvent(object source, ElapsedEventArgs e)
        {
            Console.WriteLine("The Elapsed event was raised at {0}", e.SignalTime);
        }
    }

在 C# 中使用计时器进行定期检查事件？

using the timer in C# for periodic check events?

c#

timer