Пример #1
0
    internal static bool TryParseDateIso(string text, DateParseHandling dateParseHandling, DateTimeZoneHandling dateTimeZoneHandling, out object dt)
    {
      DateTimeParser dateTimeParser = new DateTimeParser();
      if (!dateTimeParser.Parse(text))
      {
        dt = null;
        return false;
      }

      DateTime d = new DateTime(dateTimeParser.Year, dateTimeParser.Month, dateTimeParser.Day, dateTimeParser.Hour, dateTimeParser.Minute, dateTimeParser.Second);
      d = d.AddTicks(dateTimeParser.Fraction);

#if !NET20
      if (dateParseHandling == DateParseHandling.DateTimeOffset)
      {
        TimeSpan offset;

        switch (dateTimeParser.Zone)
        {
          case ParserTimeZone.Utc:
            offset = new TimeSpan(0L);
            break;
          case ParserTimeZone.LocalWestOfUtc:
            offset = new TimeSpan(-dateTimeParser.ZoneHour, -dateTimeParser.ZoneMinute, 0);
            break;
          case ParserTimeZone.LocalEastOfUtc:
            offset = new TimeSpan(dateTimeParser.ZoneHour, dateTimeParser.ZoneMinute, 0);
            break;
          default:
            offset = TimeZoneInfo.Local.GetUtcOffset(d);
            break;
        }

        long ticks = d.Ticks - offset.Ticks;
        if (ticks < 0 || ticks > 3155378975999999999)
        {
          dt = null;
          return false;
        }

        dt = new DateTimeOffset(d, offset);
        return true;
      }
      else
#endif
      {
        long ticks;

        switch (dateTimeParser.Zone)
        {
          case ParserTimeZone.Utc:
            d = new DateTime(d.Ticks, DateTimeKind.Utc);
            break;

          case ParserTimeZone.LocalWestOfUtc:
            {
              TimeSpan offset = new TimeSpan(dateTimeParser.ZoneHour, dateTimeParser.ZoneMinute, 0);
              ticks = d.Ticks + offset.Ticks;
              if (ticks <= DateTime.MaxValue.Ticks)
              {
                d = new DateTime(ticks, DateTimeKind.Utc).ToLocalTime();
              }
              else
              {
                ticks += d.GetUtcOffset().Ticks;
                if (ticks > DateTime.MaxValue.Ticks)
                  ticks = DateTime.MaxValue.Ticks;

                d = new DateTime(ticks, DateTimeKind.Local);
              }
              break;
            }
          case ParserTimeZone.LocalEastOfUtc:
            {
              TimeSpan offset = new TimeSpan(dateTimeParser.ZoneHour, dateTimeParser.ZoneMinute, 0);
              ticks = d.Ticks - offset.Ticks;
              if (ticks >= DateTime.MinValue.Ticks)
              {
                d = new DateTime(ticks, DateTimeKind.Utc).ToLocalTime();
              }
              else
              {
                ticks += d.GetUtcOffset().Ticks;
                if (ticks < DateTime.MinValue.Ticks)
                  ticks = DateTime.MinValue.Ticks;

                d = new DateTime(ticks, DateTimeKind.Local);
              }
              break;
            }
        }

        dt = EnsureDateTime(d, dateTimeZoneHandling);
        return true;
      }
    }
Пример #2
0
        internal static bool TryParseDateIso(string text, DateParseHandling dateParseHandling, DateTimeZoneHandling dateTimeZoneHandling, out object dt)
        {
            DateTimeParser dateTimeParser = new DateTimeParser();

            if (!dateTimeParser.Parse(text))
            {
                dt = null;
                return(false);
            }

            DateTime d = new DateTime(dateTimeParser.Year, dateTimeParser.Month, dateTimeParser.Day, dateTimeParser.Hour, dateTimeParser.Minute, dateTimeParser.Second);

            d = d.AddTicks(dateTimeParser.Fraction);

#if !NET20
            if (dateParseHandling == DateParseHandling.DateTimeOffset)
            {
                TimeSpan offset;

                switch (dateTimeParser.Zone)
                {
                case ParserTimeZone.Utc:
                    offset = new TimeSpan(0L);
                    break;

                case ParserTimeZone.LocalWestOfUtc:
                    offset = new TimeSpan(-dateTimeParser.ZoneHour, -dateTimeParser.ZoneMinute, 0);
                    break;

                case ParserTimeZone.LocalEastOfUtc:
                    offset = new TimeSpan(dateTimeParser.ZoneHour, dateTimeParser.ZoneMinute, 0);
                    break;

                default:
                    offset = TimeZoneInfo.Local.GetUtcOffset(d);
                    break;
                }

                long ticks = d.Ticks - offset.Ticks;
                if (ticks < 0 || ticks > 3155378975999999999)
                {
                    dt = null;
                    return(false);
                }

                dt = new DateTimeOffset(d, offset);
                return(true);
            }
            else
#endif
            {
                long ticks;

                switch (dateTimeParser.Zone)
                {
                case ParserTimeZone.Utc:
                    d = new DateTime(d.Ticks, DateTimeKind.Utc);
                    break;

                case ParserTimeZone.LocalWestOfUtc:
                {
                    TimeSpan offset = new TimeSpan(dateTimeParser.ZoneHour, dateTimeParser.ZoneMinute, 0);
                    ticks = d.Ticks + offset.Ticks;
                    if (ticks <= DateTime.MaxValue.Ticks)
                    {
                        d = new DateTime(ticks, DateTimeKind.Utc).ToLocalTime();
                    }
                    else
                    {
                        ticks += d.GetUtcOffset().Ticks;
                        if (ticks > DateTime.MaxValue.Ticks)
                        {
                            ticks = DateTime.MaxValue.Ticks;
                        }

                        d = new DateTime(ticks, DateTimeKind.Local);
                    }
                    break;
                }

                case ParserTimeZone.LocalEastOfUtc:
                {
                    TimeSpan offset = new TimeSpan(dateTimeParser.ZoneHour, dateTimeParser.ZoneMinute, 0);
                    ticks = d.Ticks - offset.Ticks;
                    if (ticks >= DateTime.MinValue.Ticks)
                    {
                        d = new DateTime(ticks, DateTimeKind.Utc).ToLocalTime();
                    }
                    else
                    {
                        ticks += d.GetUtcOffset().Ticks;
                        if (ticks < DateTime.MinValue.Ticks)
                        {
                            ticks = DateTime.MinValue.Ticks;
                        }

                        d = new DateTime(ticks, DateTimeKind.Local);
                    }
                    break;
                }
                }

                dt = EnsureDateTime(d, dateTimeZoneHandling);
                return(true);
            }
        }