예제 #1
0
        void OnClicked(object sender, System.EventArgs e)
        {
            DateTime birthday = bday.Date;
            int      legalAge = 21;

            switch (Location.SelectedItem)
            {
            case "USA":
                legalAge = 21;
                break;

            case "Mexico":
                legalAge = 18;
                break;

            case "Brazil":
                legalAge = 21;
                break;

            case "Australia":
                legalAge = 18;
                break;
            }
            DateTime.Compare(birthday, birthday.AddYears(legalAge));
            int    daysTill21 = (birthday.AddYears(legalAge) - DateTime.Now).Days;
            var    dateSpan   = DateTimeSpan.CompareDates(birthday.AddYears(legalAge), DateTime.Now);
            string message    = "";

            if (daysTill21 > 0)
            {
                message = $"In {Location.SelectedItem}, You will be able to drink in {dateSpan.Years} years {dateSpan.Months} months {dateSpan.Days} days.";
            }
            else if (daysTill21 == 0)
            {
                message = $"Congratulations! In {Location.SelectedItem}, You can drink today!";
            }
            else
            {
                message = $"In {Location.SelectedItem}, You have been able to drink for {dateSpan.Years} years {dateSpan.Months} months {dateSpan.Days} days.";
            }

            output.Text = $"{message}";
        }
예제 #2
0
        public static DateTimeSpan CompareDates(DateTime date1, DateTime date2)
        {
            if (date2 < date1)
            {
                var sub = date1;
                date1 = date2;
                date2 = sub;
            }

            DateTime current = date1;
            int      years   = 0;
            int      months  = 0;
            int      days    = 0;

            Phase        phase       = Phase.Years;
            DateTimeSpan span        = new DateTimeSpan();
            int          officialDay = current.Day;

            while (phase != Phase.Done)
            {
                switch (phase)
                {
                case Phase.Years:
                    if (current.AddYears(years + 1) > date2)
                    {
                        phase   = Phase.Months;
                        current = current.AddYears(years);
                    }
                    else
                    {
                        years++;
                    }
                    break;

                case Phase.Months:
                    if (current.AddMonths(months + 1) > date2)
                    {
                        phase   = Phase.Days;
                        current = current.AddMonths(months);
                        if (current.Day < officialDay && officialDay <= DateTime.DaysInMonth(current.Year, current.Month))
                        {
                            current = current.AddDays(officialDay - current.Day);
                        }
                    }
                    else
                    {
                        months++;
                    }
                    break;

                case Phase.Days:
                    if (current.AddDays(days + 1) > date2)
                    {
                        current = current.AddDays(days);
                        var timespan = date2 - current;
                        span  = new DateTimeSpan(years, months, days, timespan.Hours, timespan.Minutes, timespan.Seconds, timespan.Milliseconds);
                        phase = Phase.Done;
                    }
                    else
                    {
                        days++;
                    }
                    break;
                }
            }

            return(span);
        }