Question

What’s the best way to trim a DateTime object to a specific precision? For instance, if I have a DateTime with a value of ‘2008-09-29 09:41:43’, but I only want it’s precision to be to the minute, is there any better way to do it than this?

private static DateTime TrimDateToMinute(DateTime date) {     return new DateTime(         date.Year,          date.Month,          date.Day,          date.Hour,          date.Minute,          0); } 

What I would really want is to make it variable so that I could set its precision to the second, minute, hour, or day.

Answer 1

static class Program {     //using extension method:     static DateTime Trim(this DateTime date, long roundTicks)     {         return new DateTime(date.Ticks - date.Ticks % roundTicks, date.Kind);     }      //sample usage:     static void Main(string[] args)     {         Console.WriteLine(DateTime.Now);         Console.WriteLine(DateTime.Now.Trim(TimeSpan.TicksPerDay));         Console.WriteLine(DateTime.Now.Trim(TimeSpan.TicksPerHour));         Console.WriteLine(DateTime.Now.Trim(TimeSpan.TicksPerMillisecond));         Console.WriteLine(DateTime.Now.Trim(TimeSpan.TicksPerMinute));         Console.WriteLine(DateTime.Now.Trim(TimeSpan.TicksPerSecond));         Console.ReadLine();     }  }