Stop watch delay using timer c#

问题

I want to add a stopWatch to my form but the one i made is lagging behind the time of other timer in pc. Can you give any solution for that? (My timer interval is 100). this is my code:

int min, sec, ms = 0;
    private void timer1_Tick(object sender, EventArgs e)
    {
        Time.Text = min + ":" + sec + ":" + ms.ToString();
        ms++;
        if (ms > 9)
        {
            ms = 0;
            sec++;
        }

        if (sec > 59)
        {
            sec = 0;
            min++;
        }

    }

    private void timer_Click(object sender, EventArgs e)
    {
        timer1.Start();
    }

It working but with easy delay. I have tried to change so many things but none of them is working..

回答1:

Timer's tick is not as precise as you think. So It would be better if you calculate the difference between start time and the time tick invoked.

DateTime startTime = DateTime.Now;  
private void timer1_Tick(object sender, EventArgs e)
{
    Time.Text = DateTime.Now.Subtract(startTime).ToString(@"mm\:ss\.ff");
}

private void timer_Click(object sender, EventArgs e)
{
    startTime = DateTime.Now;   
    timer1.Start();
}

回答2:

Your timer interval is 100ms, so create a TimeSpan object, as a class variable, for that

TimeSpan _100ms = new TimeSpan(0,0,0,0,100);

Add this to your TimeSpan object that you're using to track time

TimeSpan ts = new TimeSpan();
ts = ts.Add(_100ms);

To display it to your UI:

private void timer1_Tick(object sender, EventArgs e)
{
    ts = ts.Add(_100ms);
    Time.Text = ts.ToString(@"hh\:mm\:ss\.fff");
}

Fiddle Demo

来源：https://stackoverflow.com/questions/31777476/stop-watch-delay-using-timer-c-sharp