DateTime now = DateTime.Now;
int second = 0;
// round to nearest 5 second mark
if (now.Second % 5 > 2.5)
{
// round up
second = now.Second + (5 - (now.Second % 5));
}
else
{
// round down
second = now.Second - (now.Second % 5);
}
DateTime rounded = new DateTime(now.Year, now.Month, now.Day, now.Hour, now.Minute, second);
DateTime now = DateTime.Now;
DateTime rounded = new DateTime(((now.Ticks + 25000000) / 50000000) * 50000000);
public static TimeSpan Round(this TimeSpan time, TimeSpan roundingInterval, MidpointRounding roundingType) {
return new TimeSpan(
Convert.ToInt64(Math.Round(
time.Ticks / (decimal)roundingInterval.Ticks,
roundingType
)) * roundingInterval.Ticks
);
}
public static TimeSpan Round(this TimeSpan time, TimeSpan roundingInterval) {
return Round(time, roundingInterval, MidpointRounding.ToEven);
}
public static DateTime Round(this DateTime datetime, TimeSpan roundingInterval) {
return new DateTime((datetime - DateTime.MinValue).Round(roundingInterval).Ticks);
}
new DateTime(2010, 11, 4, 10, 28, 27).Round(TimeSpan.FromMinutes(1)); // rounds to 2010.11.04 10:28:00
new DateTime(2010, 11, 4, 13, 28, 27).Round(TimeSpan.FromDays(1)); // rounds to 2010.11.05 00:00
new TimeSpan(0, 2, 26).Round(TimeSpan.FromSeconds(5)); // rounds to 00:02:25
new TimeSpan(3, 34, 0).Round(TimeSpan.FromMinutes(37); // rounds to 03:42:00...for all your round-to-37-minute needs
static int Round(int n, int r)
{
if ((n % r) <= r / 2)
{
return n - (n % r);
}
return n + (r - (n % r));
}
DateTime rounded = roundTo5Secs (DateTime.Now);
secBase = now.Second / 5;
secExtra = now.Second % 5;
if (secExtra > 2) {
return new DateTime(now.Year, now.Month, now.Day, now.Hour, now.Minute,
secBase + 5);
}
return new DateTime(now.Year, now.Month, now.Day, now.Hour, now.Minute,
secBase);
// truncate to multiple of 5
int second = 5 * (int) (now.Second / 5);
DateTime dt = new DateTime(..., second);
// round-up if necessary
if (now.Second % 5 > 2.5)
{
dt = dt.AddSeconds(5);
}