将juilan日期（不是双精度，而是日期）转换为公历

Question

I have a julian date : 1104-08-16, How do I convert it into gregorian date in c#?

I found following links... link link . But all of them use julian date value as float/decimal.

In my case julian is not float, it is actual date.

Any help would be appreciated.

Answer 1

If you don't know or care about time zones, you could try the following. I used this approach because I couldn't find a parse method that allowed you to specify which calendar to interpret the input.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Globalization;

namespace julian2gregorian
{
    class Program
    {
        private static JulianCalendar jcal;
        static void Main(string[] args)
        {
            jcal = new JulianCalendar();
            string jDateString = "1104-08-16";
            char[] delimiterChars = { '-' };
            string[] dateParts = jDateString.Split(delimiterChars);
            int jyear, jmonth, jday;
            bool success = int.TryParse(dateParts[0], out jyear);
            success = int.TryParse(dateParts[1], out jmonth);
            success = int.TryParse(dateParts[2], out jday);
            DateTime myDate = new DateTime(jyear, jmonth, jday, 0, 0, 0, 0, jcal);
            Console.WriteLine("Date converted to Gregorian: {0}", myDate);
            Console.ReadLine();
        }
    }
}