生年月日から今日までのC#の年齢を計算する方法(正確には天まで)

11882 ワード

C#年齢の計算方法、自分で1つのとてもぼろぼろなことを書いて、計算はそんなに正確ではないべきで、バックアップ ///


        ///  
        /// 
        ///  
        ///  
        /// 
        public static string GetAgeYDM(DateTime birthday, DateTime now)
        {
            string ts = "";
            int day = System.Threading.Thread.CurrentThread.CurrentUICulture.Calendar.GetDaysInMonth(birthday.Year, birthday.Month);
            int mon = 0;
            var age = now.Year - birthday.Year;
            if (now.Month < birthday.Month)
            {
                age--;
                if (now.Day < birthday.Day)
                {
                    day = day - birthday.Day + now.Day;
                    mon = 12 - birthday.Month + now.Month - 1;
                }
                else
                {
                    day = now.Day - birthday.Day;
                    mon = 12 - birthday.Month + now.Month;
                }
            }
            if (now.Month == birthday.Month)
            {
                if (now.Day < birthday.Day)
                {
                    age--;
                    day = day - birthday.Day + now.Day;
                    mon = 12 - birthday.Month + now.Month - 1;
                }
                else
                {
                    day = now.Day - birthday.Day;
                }
            }
            if (now.Month > birthday.Month)
            {
                if (now.Day < birthday.Day)
                {
                    mon = now.Month - 1 - birthday.Month;
                    day = day - birthday.Day + now.Day;
                }
                else
                {
                    mon = now.Month  - birthday.Month;
                    day = now.Day - birthday.Day;
                }
            }

            if (age < 6 && age >=0)
            {
                if (age != 0)
                {
                    ts = ts + age + " ";
                }
                if (mon != 0)
                {
                    ts = ts + mon + " ";
                }
                if (day != 0)
                {
                    ts = ts + day + " ";
                }
                return ts;
            }
            else if (age < 0)
            {
                return " :"+DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
            }
            else
            {
                return age + " ";
            }
        }

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