public static DateInfo OffsetBy(this DateInfo dt, int offsetVal, DateTimeOffsetStyles styles)
 {
     return(styles switch
     {
         DateTimeOffsetStyles.Day => DateInfoCalc.OffsetByDays(dt, offsetVal),
         DateTimeOffsetStyles.Week => DateInfoCalc.OffsetByWeeks(dt, offsetVal),
         DateTimeOffsetStyles.Month => DateInfoCalc.OffsetByMonths(dt, offsetVal, DateTimeOffsetOptions.Relatively),
         DateTimeOffsetStyles.Quarters => DateInfoCalc.OffsetByQuarters(dt, offsetVal, DateTimeOffsetOptions.Relatively),
         DateTimeOffsetStyles.Year => DateInfoCalc.OffsetByYears(dt, offsetVal, DateTimeOffsetOptions.Relatively),
         _ => DateInfoCalc.OffsetByDays(dt, offsetVal)
     });
        /// <summary>
        /// Previous Year
        /// </summary>
        /// <param name="d"></param>
        /// <returns></returns>
        public static DateInfo PreviousYear(this DateInfo d)
        {
            var year        = d.Year - 1;
            var daysOfMonth = DateTime.DaysInMonth(year, d.Month);

            if (daysOfMonth == d.Day)
            {
                return(new DateInfo(year, d.Month, d.Day));
            }

            var m = d.Day - daysOfMonth;
            var p = new DateInfo(year, d.Month, daysOfMonth);

            return(p + m.Days());
        }
示例#3
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        /// <summary>
        /// Create <see cref="DateInfo"/> by special year, month and offset info.<br />
        /// 根据指定的年月和偏移信息创建 <see cref="DateInfo"/>
        /// </summary>
        /// <param name="year"></param>
        /// <param name="month"></param>
        /// <param name="weekAtMonth"></param>
        /// <param name="dayOfWeek"></param>
        /// <returns></returns>
        public static DateInfo OffsetByWeek(int year, int month, int weekAtMonth, int dayOfWeek)
        {
            if (weekAtMonth == 0 || weekAtMonth > 5)
            {
                throw new ArgumentException("weekAtMonth is invalid.", nameof(weekAtMonth));
            }

            var targetDay = DateTimeCalcHelper.GetTargetDays(year, month, weekAtMonth, dayOfWeek);

            if (targetDay > DateInfo.DaysInMonth(year, month))
            {
                return(DateInfo.InfinitePast);
            }

            return(DateInfoFactory.Create(year, month, targetDay));
        }
        /// <summary>
        /// Add business days<br />
        /// 添加指定个数量的工作日
        /// </summary>
        /// <param name="d"></param>
        /// <param name="days"></param>
        /// <returns></returns>
        public static DateInfo AddBusinessDays(this DateInfo d, int days)
        {
            var sign         = Math.Sign(days);
            var unsignedDays = Math.Abs(days);

            for (var i = 0; i < unsignedDays; i++)
            {
                do
                {
                    d = d.AddDays(sign);
                } while (d.DayOfWeek == DayOfWeek.Saturday ||
                         d.DayOfWeek == DayOfWeek.Sunday);
            }

            return(d);
        }
示例#5
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        /// <summary>
        /// Add quarters. <br />
        /// 添加一个季度。
        /// </summary>
        /// <param name="dt"></param>
        /// <param name="months"></param>
        /// <param name="options"></param>
        /// <returns></returns>
        /// <exception cref="ArgumentNullException"></exception>
        public static DateInfo OffsetByMonths(DateInfo dt, int months, DateTimeOffsetOptions options = DateTimeOffsetOptions.Absolute)
        {
            if (options == DateTimeOffsetOptions.Absolute)
            {
                return(dt + months.Months());
            }

            var(year, month) = DateTimeCalcHelper.Calc(dt.Year, dt.Month, months);

            var firstDayOfMonth = dt.SetDate(year, month, 1);

            var lastDayOfMonth = firstDayOfMonth.LastDayOfMonth().Day;

            var day = dt.Day > lastDayOfMonth ? lastDayOfMonth : dt.Day;

            return(dt.SetDate(year, month, day));
        }
 public static bool IsSameYear(this DateInfo d, DateInfo date) => d.Year == date.Year;
 public static bool IsSameMonth(this DateInfo d, DateInfo date) => d.Month == date.Month && d.Year == date.Year;
 public static bool IsSameDay(this DateInfo d, DateInfo date) => d.DateTimeRef == date.DateTimeRef;
 public static DateInfo AddWeeks(this DateInfo d, int weeks) => d.AddDays(weeks * 7);
 /// <summary>
 /// Get last day of this week
 /// </summary>
 /// <param name="d"></param>
 /// <param name="cultureInfo"></param>
 /// <returns></returns>
 public static DateInfo GetFirstDayInfoOfWeek(this DateInfo d, CultureInfo cultureInfo) => d.DateTimeRef.GetFirstDayInfoOfWeek(cultureInfo);
 public static DateInfo SetDay(this DateInfo d, int day)
 {
     d.Day = day;
     return(d);
 }
 public static DateInfo SetYear(this DateInfo d, int year)
 {
     d.Year = year;
     return(d);
 }
 public static bool IsBefore(this DateInfo d, DateInfo toCompareWith) => d < toCompareWith;
        /// <summary>
        /// Is current date between <paramref name="min"/> and <paramref name="max"/> without boundary.<br />
        /// 判断当前日期是否在 min 和 max 之间,开区间。
        /// </summary>
        /// <param name="d"></param>
        /// <param name="min"></param>
        /// <param name="max"></param>
        /// <returns></returns>
        public static bool IsDateBetweenWithoutBoundary(this DateInfo d, DateInfo min, DateInfo max)
        {
            var dtRef  = d.DateTimeRef;
            var minRef = min.DateTimeRef;
            var maxRef = max.DateTimeRef;

            return(dtRef.IsDateBetweenWithoutBoundary(minRef, maxRef));
        }
 /// <summary>
 /// Get last day of this week
 /// </summary>
 /// <param name="d"></param>
 /// <returns></returns>
 public static DateInfo GetLastDayInfoOfWeek(this DateInfo d) => d.GetLastDayInfoOfWeek(null);
 /// <summary>
 /// Gets first day of year
 /// </summary>
 /// <param name="d"></param>
 /// <param name="dayOfWeek"></param>
 /// <returns></returns>
 public static DateInfo GetFirstDayInfoOfYear(this DateInfo d, DayOfWeek dayOfWeek) => d.DateTimeRef.GetFirstDayInfoOfYear(dayOfWeek);
 /// <summary>
 /// Gets first day of year
 /// </summary>
 /// <param name="d"></param>
 /// <returns></returns>
 public static DateInfo GetFirstDayInfoOfYear(this DateInfo d) => new DateInfo(d.Year, 1, 1);
 /// <summary>
 /// Gets first day info of quarter
 /// </summary>
 /// <param name="d"></param>
 /// <returns></returns>
 public static DateInfo GetFirstDayInfoOfQuarter(this DateInfo d) => d.DateTimeRef.GetFirstDayInfoOfQuarter();
 /// <summary>
 /// Get first day of this month.
 /// </summary>
 /// <param name="dt"></param>
 /// <returns></returns>
 public static DateInfo GetFirstDayInfoOfMonth(this DateInfo dt) => new DateInfo(dt.Year, dt.Month, 1);
 public static DateInfo SetDate(this DateInfo d, int year, int month)
 {
     d.Year  = year;
     d.Month = month;
     return(d);
 }
 public static DateInfo AddQuarters(this DateInfo d, int quarters) => d.AddMonths(quarters * 3);
        /// <summary>
        /// To ago.<br />
        /// 转换为 Ago
        /// </summary>
        /// <param name="d"></param>
        /// <returns></returns>
#pragma warning disable 618
        public static string ToAgo(this DateInfo d) => (DateTime.Now - d).ToAgo();
 public static DateInfo SetMonth(this DateInfo d, int month)
 {
     d.Month = month;
     return(d);
 }
 public static bool TryParseExact(string s, string[] formats, IFormatProvider provider, DateTimeStyles styles, out DateInfo result)
 {
     return(DateInfoParse.TryParseExactMultiple(s, formats, DateTimeFormatInfo.GetInstance(provider), styles, out result));
 }
 public static bool IsAfter(this DateInfo d, DateInfo toCompareWith) => d > toCompareWith;
 /// <summary>
 /// Get last day info of year
 /// </summary>
 /// <param name="d"></param>
 /// <returns></returns>
 public static DateInfo GetLastDayInfoOfYear(this DateInfo d) => d.DateTimeRef.GetLastDayInfoOfYear();
 public static bool TryParse(string s, out DateInfo result)
 {
     return(DateInfoParse.TryParse(s, DateTimeFormatInfo.CurrentInfo, DateTimeStyles.None, out result));
 }
 public static bool IsInTheFuture(this DateInfo d) => d > DateTime.Now;
 public static bool TryParseExactMultiple(string s, string[] formats, DateTimeFormatInfo formatInfo, DateTimeStyles styles, out DateInfo result)
 {
     return(TryCreateDateInfo(DateTime.TryParseExact(s, formats, formatInfo, styles, out var time), time, out result));
 }
 public static bool IsInThePast(this DateInfo d) => d < DateTime.Now;