Question

我的程序有一个参数可以启动winform并在运行函数之前等待 x 秒数。目前我正在使用线程休眠 x 秒，然后该函数运行。如何在条带状态标签中添加计时器？

所以它说：x Seconds Remaining...

Answer 1

而不是阻止线程执行，只需在需要超时传递时调用您的方法。将新的Timer放入表单，并将其间隔设置为1000。然后订阅计时器的Tick事件并计算事件处理程序中的已用时间：

private int secondsToWait = 42;
private DateTime startTime;

private void button_Click(object sender, EventArgs e)
{
    timer.Start(); // start timer (you can do it on form load, if you need)
    startTime = DateTime.Now; // and remember start time
}

private void timer_Tick(object sender, EventArgs e)
{
    int elapsedSeconds = (int)(DateTime.Now - startTime).TotalSeconds;
    int remainingSeconds = secondsToWait - elapsedSeconds;

    if (remainingSeconds <= 0)
    {
        // run your function
        timer.Stop();
    }

    toolStripStatusLabel.Text = 
        String.Format("{0} seconds remaining...", remainingSeconds);
}

Answer 2

您可以使用Timer：

public class Form1 : Form {
    public Form1(){
        InitializeComponent();
        t = new Timer {Interval = 1000};
        t.Tick += Tick;
        //try counting down the time
        CountDown(100);
    }
    DateTime start;
    Timer t;  
    long s;
    public void CountDown(long seconds){
       start = DateTime.Now;
       s = seconds;
       t.Start();
    }
    private void Tick(object sender, EventArgs e){
       long remainingSeconds = s - (DateTime.Now - start).TotalSeconds;
       if(remainingSeconds <= 0) {
         t.Stop(); 
         toolStripStatusLabel1.Text = "Done!";
         return;
       }
       toolStripStatusLabel1.Text = string.Format("{0} seconds remaining...", remainingSeconds);
    }
}

条带状态标签中的倒计时定时器c＃

2 个答案: