示例#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);
            }
        }
示例#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;
            }
        }