To Julian Date - CSharp System

CSharp examples for System:DateTime Convert

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Description

To Julian Date

Demo Code


using System.Text;
using System.Collections.Generic;
using System;/*ww  w . ja va 2  s  .  co  m*/

public class Main{
        public static Int32 ToJulian(DateTime value)
      {

         int y = value.Year;
         int m = value.Month;
         int day = value.Day;
         int ijulian;
         int IGREG = 15 + 31 * (10 + 12 * 1582); // Greg.Calendar 10/15/1582
         int adj;

         if (y < 0) y = y + 1;
         if (m > 2)
            m = m + 1;
         else
         {
            y = y - 1;
            m = m + 13;
         }

         ijulian = (int)(365.25 * y) + (int)(30.6001 * m) + day + 1720995;

         if (day + 31 * (m + 12 * y) >= IGREG)
         { // change for Gregorian calendar
            adj = y / 100;
            ijulian = ijulian + 2 - adj + adj / 4;
         }


         Int32 dayPart = ijulian;
         return dayPart;
      }
}

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