public TimeZoneOffsetComponent(TimeZoneOffsetType timeZoneType, TimeZoneInfo timeZone)
: base(ComponentType.TimeZone, timeZoneType.GetDescription())
{
StartDate = new DateTime(1970, 1, 1, 0, 0, 0);
TimeZoneInfo = timeZone;
TimeZoneType = timeZoneType;
OffsetWinter = TimeZoneInfo.GetUtcOffset(new DateTime(DateTime.Today.Year, 1, 1));
OffsetSummer = TimeZoneInfo.GetUtcOffset(new DateTime(DateTime.Today.Year, 6, 1));
OffsetFrom = TimeZoneType == TimeZoneOffsetType.Standard ? OffsetSummer : OffsetWinter;
OffsetTo = TimeZoneType == TimeZoneOffsetType.Standard ? OffsetWinter : OffsetSummer;
if (!timeZone.SupportsDaylightSavingTime)
{
return;
}
List <RecurranceValue> items = new List <RecurranceValue>();
foreach (var rule in timeZone.GetAdjustmentRules())
{
if (DateTime.Today.Year < rule.DateStart.Year || DateTime.Today.Year > rule.DateEnd.Year)
{
continue;
}
TimeZoneInfo.TransitionTime transition = timeZoneType == TimeZoneOffsetType.Daylight
? rule.DaylightTransitionStart
: rule.DaylightTransitionEnd;
items.Add(new RecurranceValue(RecurrencePrefix.Month, transition.Month));
if (transition.IsFixedDateRule)
{
items.Add(new RecurranceValue(RecurrencePrefix.MonthDay, transition.Day));
}
else
{
int weekNumber = (WeekOfMonth)transition.Week == WeekOfMonth.Last ? -1 : transition.Week;
RecurrenceDayOfWeek recurrenceDay = (RecurrenceDayOfWeek)(int)transition.DayOfWeek;
items.Add(new RecurranceValue(RecurrencePrefix.Day, weekNumber, recurrenceDay.GetDescription()));
}
RecurrenceRule = new RecurrenceRuleElement(RecurrenceFrequency.Yearly, items);
StartDate = new DateTime(rule.DateStart.Year <= 1970 ? 1970 : rule.DateStart.Year, rule.DateStart.Month,
rule.DateStart.Day, transition.TimeOfDay.Hour, transition.TimeOfDay.Minute, transition.TimeOfDay.Second);
}
}
public RecurrenceWeekday(int?number, DayOfWeek day)
{
Number = number;
Day = (RecurrenceDayOfWeek)day;
}