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DateTime difference

/ Published in: C#
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Calculates the years, months and days between two DateTime objects

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  1. public static void TimeSpanToDate(DateTime larger, DateTime smaller, out int years, out int months, out int days)
  2. {
  3. 	// we want larger to be the larger (newest) date  
  4. 	// flip if we need to  
  5. 	if (larger < smaller)
  6. 	{
  7. 		DateTime d3 = smaller;
  8. 		smaller = larger;
  9. 		larger = d3;
  10. 	}
  11.  
  12. 	// compute difference in total months  
  13. 	months = 12 * (larger.Year - smaller.Year) + (larger.Month - smaller.Month);
  14.  
  15. 	// based upon the 'days',  
  16. 	// adjust months & compute actual days difference  
  17. 	if (larger.Day < smaller.Day)
  18. 	{
  19. 		months--;
  20. 		days = DateTime.DaysInMonth(smaller.Year, smaller.Month) - smaller.Day + larger.Day;
  21. 	}
  22. 	else
  23. 	{
  24. 		days = larger.Day - smaller.Day;
  25. 	}
  26. 	// compute years & actual months  
  27. 	years = months / 12;
  28. 	months -= years * 12;
  29. }

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