Is there a more elegant way of removing seconds from a TimeSpan?

Question

Assuming I have a TimeSpan that is equal to 07:10:30, I can use the following code to strip the seconds from it:

myTimeSpan = new TimeSpan(myTimeSpan.Hours, myTimeSpan.Minutes, 0)

Is this appropriate, or is there a more elegant way to achieve this?

Do you also want to strip the [`Days`](https://learn.microsoft.com/en-us/dotnet/api/system.timespan.days) component from the `TimeSpan` value? Because that's what your current code does. — Theodor Zoulias, Nov 08 '21 at 11:12

JonasH · Accepted Answer · 2021-11-08T12:08:24.850

2

I would propose

TimeSpan.FromMinutes((long) myTimeSpan.TotalMinutes)

This removes any time component smaller than one minute, while keeping anything larger, like days, hours etc. Use Math.Round if you want rounding to nearest minute instead of truncating.

edited Nov 08 '21 at 12:08

answered Nov 08 '21 at 10:58

JonasH

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Is this safe from arithmetic overflow (double => int)? – Theodor Zoulias Nov 08 '21 at 11:07
@TheodorZoulias Well [it covers you for 4086 years](https://www.wolframalpha.com/input/?i=%282%5E31%29+%2F+%28minutes+in+1+year%29) so I think you'll be safe – Charlieface Nov 08 '21 at 11:28
@Charlieface so striping minutes from the grand opening of [Khufu's pyramid](https://en.wikipedia.org/wiki/Great_Pyramid_of_Giza) till now is not recommended. – Theodor Zoulias Nov 08 '21 at 11:41
1

@Charlieface A solution should support the extrema of `TimeSpan`'s domain. – jdphenix Nov 08 '21 at 11:46

score 1 · Answer 2 · answered Nov 08 '21 at 11:37

Make an extension method that rounds towards zero to the nearest TimeSpan.TicksPerMinute.

public static class TimeSpanExtensions
{
    public static TimeSpan WithoutSeconds(this TimeSpan ts)
    {
        const long ps = TimeSpan.TicksPerMinute;
        long roundedTicks = ts.Ticks / ps * ps;
        return new TimeSpan(roundedTicks);
    }
}

Ref: https://learn.microsoft.com/en-us/dotnet/api/system.timespan.ticks?view=net-5.0#System_TimeSpan_Ticks

Is there a more elegant way of removing seconds from a TimeSpan?

2 Answers2