Have datetime.now return to the nearest second

Question

I have a \"requirement\" to give a timestamp to the nearest second... but NOT more accurate than that. Rounding or truncating the time is fine.

I have come up with t

Answer 1

Here is a rounding method that rounds up or down to the nearest second instead of just trimming:

public static DateTime Round(this DateTime date, long ticks = TimeSpan.TicksPerSecond) {
    if (ticks>1)
    {
        var frac = date.Ticks % ticks;
        if (frac != 0)
        {
            // Rounding is needed..
            if (frac*2 >= ticks)
            {
                // round up
                return new DateTime(date.Ticks + ticks - frac);
            }
            else
            {
                // round down
                return new DateTime(date.Ticks - frac);
            }
        }
    }
    return date;
}

It can be used like this:

DateTime now = DateTime.Now;
DateTime nowTrimmedToSeconds = now.Round(TimeSpan.TicksPerSecond);
DateTime nowTrimmedToMinutes = now.Round(TimeSpan.TicksPerMinute);