public struct DateTimeSpan > { > public DateTimeSpan(int years, int months, int days, int hours, int minutes, int seconds) > { > Years = years; Months = months; Days = days; > Hours = hours; Minutes = minutes; Seconds = seconds; > } > > public int Years; > public int Months; > public int Days; > public int Hours; > public int Minutes; > public int Seconds; > > public override string ToString() > { > return string.Format("Years:{0} Months:{1} Days:{2} Hours:{3} Minutes:{4} Seconds:{5}", > Years, Months, Days, Hours, Minutes, Seconds); > } > }I tried this:
static DateTimeSpan GetDateDiff(DateTime startDate, DateTime endDate) > { > int year = endDate.Year; > int month = endDate.Month; > > TimeSpan startSpan = new TimeSpan(startDate.Day, startDate.Hour, startDate.Minute, startDate.Second); > TimeSpan endSpan = new TimeSpan(endDate.Day, endDate.Hour, endDate.Minute, endDate.Second); > > if (endSpan - startSpan < new TimeSpan(0)) > { > month -= 1; > if (month == 0) > { > month = 12; > year -= 1; > } > } > TimeSpan ts = endDate.Subtract(new DateTime(year, month, startDate.Day, startDate.Hour, startDate.Minute, startDate.Second)); > return new DateTimeSpan(year - startDate.Year, month - startDate.Month, ts.Days, ts.Hours, ts.Minutes, ts.Seconds); > }Test:
DateTime earlierDate = new DateTime(2006, 1, 12,23, 15, 12); >DateTime laterDate = new DateTime(2010, 1, 4, 9, 55, 40); > > for (int i = 0; i < 1000; i++) > { > DateTimeSpan dts = GetDateDiff(earlierDate, laterDate); > Console.WriteLine("From:{0} To:{1}", earlierDate, laterDate); > Console.WriteLine(dts); > > if (earlierDate.AddYears(dts.Years).AddMonths(dts.Months).AddDays(dts.Days) > .AddHours(dts.Hours).AddMinutes(dts.Minutes).AddSeconds(dts.Seconds) != laterDate) > throw new Exception("Crap code"); > > laterDate = laterDate.Subtract(new TimeSpan(1, 20, 10)); > }Maybe could be simplified more but at least GetDateDiff() is a bit shorter...