Question

我需要在鼠标移动到其他面板后让面板在特定时间内可见我一直在解决这个问题。我试过使用Timer但是我没有成功。

这是我的代码：

 this.MouseHover += new EventHandler(myMouseHover);

   [...]
   //event handler
   private void myMouseHover(object sender, EventArgs e)
        {

                this.prevPanel.Visible = true;
                this.nextPanel.Visible = true;

                /* here I want put timer */

                this.prevPanel.Visible = false;
                this.nextPanel.Visible = false;

        }

Answer 1

您可以使用Timer并定义Interval属性

财产：

private System.Windows.Forms.Timer aTimer;

初始化：

    aTimer = new System.Windows.Forms.Timer();

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

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

代表：

private static void OnTimedEvent(object source, ElapsedEventArgs e)
{
      this.prevPanel.Visible = false;
      this.nextPanel.Visible = false;
}

Answer 2

根据您使用的计时器类型，您需要放置隐藏面板的代码以响应tick事件。

例如，使用System.Windows.Forms.Timer：

System.Windows.Forms.Timer myTimer = new System.Windows.Forms.Timer();

// form constructor
public myForm() 
{
    myTimer.Interval = 1000;    // or whatever you need it to be
    myTimer.Tick += new EventHandler(TimerEventProcessor);   
}

private void myMouseHover(object sender, EventArgs e) 
{
     this.prevPanel.Visible = true;
     this.nextPanel.Visible = true;
     myTimer.Start();
 }

private void TimerEventProcessor(Object myObject, EventArgs myEventArgs) {
     myTimer.Stop();
     this.prevPanel.Visible = false;
     this.nextPanel.Visible = false;
}

您可以使用其他计时器，但WinForms计时器具有在UI线程中触发的优势，因此您无需担心它。需要注意的一点是，如果鼠标悬停事件在计时器到期之前再次触发，您需要考虑会发生什么。

最后，如果您使用的是WPF而不是WinForms，您可以使用动画在XAML中完成所有操作。

Answer 3

System.Timers.Timer timer1 = new System.Timers.Timer ();

timer1.Interval  = periodAfterToStopInMiliseconds;

timer1.Elapsed += timer1_Elapsed;

private void ActLikeIWant(double periodAfterToStopInMiliseconds)
{
    timer1.Start();
}

void timer1_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
     var timer = (System.Timers.Timer) sender;

     timer.Stop();

     this.prevPanel.Visible = false;
     this.nextPanel.Visible = false;
}

private void myMouseHover(object sender, EventArgs e)
{
    this.prevPanel.Visible = true;
    this.nextPanel.Visible = true;

    ActLikeIWant(periodAfterToStopInMiliseconds: 200);
}

鼠标移动到其他面板后，C＃make面板在特定时间内可见

3 个答案: