DispatcherTimer应用间隔并立即执行

Dev*_*per 11 .net c# timer

基本上当我们应用一些间隔即5秒时我们必须等待它.

是否可以立即应用间隔和执行定时器,不等待5秒?(我的意思是间隔时间).

任何线索?

谢谢!!

public partial class MainWindow : Window
    {
        DispatcherTimer timer = new DispatcherTimer();

        public MainWindow()
        {
            InitializeComponent();

            timer.Tick += new EventHandler(timer_Tick);
            this.Loaded += new RoutedEventHandler(MainWindow_Loaded);
        }

        void timer_Tick(object sender, EventArgs e)
        {
            MessageBox.Show("!!!");
        }

        void MainWindow_Loaded(object sender, RoutedEventArgs e)
        {
            timer.Interval = new TimeSpan(0, 0, 5);
            timer.Start();
        }
    }
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Jin*_*Jin 19

肯定有更优雅的解决方案,但一种hacky方式是在最初设置间隔后调用timer_Tick方法.这比设置每个滴答的间隔要好.


Aus*_*nen 8

最初将间隔设置为零,然后在后续调用中将其提高.

void timer_Tick(object sender, EventArgs e)
{
    ((Timer)sender).Interval = new TimeSpan(0, 0, 5);
    MessageBox.Show("!!!");
}
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Geo*_*lis 5

可以试试这个:

timer.Tick += Timer_Tick;
timer.Interval = 0;
timer.Start();

//...

public void Timer_Tick(object sender, EventArgs e)
{
  if (timer.Interval == 0) {
    timer.Stop();
    timer.Interval = SOME_INTERVAL;
    timer.Start();
    return;
  }

  //your timer action code here
}
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另一种方法是使用两个事件处理程序(以避免在每个滴答声中检查“if”):

timer.Tick += Timer_TickInit;
timer.Interval = 0;
timer.Start();

//...

public void Timer_TickInit(object sender, EventArgs e)
{
    timer.Stop();
    timer.Interval = SOME_INTERVAL;
    timer.Tick += Timer_Tick();
    timer.Start();
}

public void Timer_Tick(object sender, EventArgs e)
{
  //your timer action code here
}
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然而,更清洁的方法是已经建议的:

timer.Tick += Timer_Tick;
timer.Interval = SOME_INTERVAL;
SomeAction();
timer.Start();

//...

public void Timer_Tick(object sender, EventArgs e)
{
  SomeAction();
}

public void SomeAction(){
  //...
}
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