为什么这个C#定时器代码不起作用？

Question

对于我正在编写的应用程序,我需要能够一次禁用按钮1.5秒.显示图像,用户单击按钮,然后显示另一个图像.我需要确保用户不会再太快点击按钮.

因此,当显示图像时,我调用此函数:

    //when a new image is displayed, start the timer and disable the 'done' button
    //for 1.5 seconds, to force people to stop pressing next so quickly
    System.Timers.Timer mTimer;
    void TimerStart() {
        Done.IsEnabled = false;

        mTimer = new System.Timers.Timer();
        mTimer.Interval = 1500;
        mTimer.Start();
        mTimer.Elapsed += new System.Timers.ElapsedEventHandler(TimerEnd);
    }

TimerEnd代码如下所示:

    void TimerEnd(object sender, EventArgs eArgs) {
        if (sender == mTimer){
            Done.IsEnabled = true;
            mTimer.Stop();
        }
    }

"Done.IsEnabled"行被点击,但按钮未重新启用,计时器不会停止触发.我在这做错了什么？如果重要,这是一个WPF应用程序.

Answer 1

请改用DispatcherTimer

DispatcherTimer timer = new DispatcherTimer();
timer.Interval = TimeSpan.FromMilliseconds(someInterval);
timer.Tick += new EventHandler(someEventHandler);
timer.Start();

private void someEventHandler(Object sender, EventArgs args)
{
//some operations
//if you want this event handler executed for just once
// DispatcherTimer thisTimer = (DispatcherTimer)sender;
// thisTimer.Stop();
}