public IsAmbiguousTime ( System.DateTime dateTime ) : bool | ||
dateTime | System.DateTime | |
리턴 | bool |
static internal TimeSpan GetUtcOffsetFromUtc (DateTime time, TimeZoneInfo zone, out Boolean isDaylightSavings, out Boolean isAmbiguousLocalDst) { isDaylightSavings = false; isAmbiguousLocalDst = false; TimeSpan baseOffset = zone.BaseUtcOffset; if (zone.IsAmbiguousTime (time)) { isAmbiguousLocalDst = true; return baseOffset; } return zone.GetUtcOffset (time, out isDaylightSavings); }
public static TimeSpan GetUtcOffset(DateTime dateTime, TimeZoneInfo timeZoneInfo) { // Unlike the default behavior of TimeZoneInfo.GetUtcOffset, it is prefered to choose // the DAYLIGHT time when the input is ambiguous, because the daylight instance is the // FIRST instance, and time moves in a forward direction. TimeSpan offset = timeZoneInfo.IsAmbiguousTime(dateTime) ? timeZoneInfo.GetAmbiguousTimeOffsets(dateTime).Max() : timeZoneInfo.GetUtcOffset(dateTime); return offset; }
//This function identify how many periods has a given date private int IdentifyPeriodsByDate(DateTime localDate, TimeZoneInfo timeZone) { DateTime initDate = localDate.Date; DateTime initDateNextDay = initDate.AddDays(1); //Inicialmente la variable de retorno tendrá el valor 24 ya que son los periodos normales que tienen casi todos los días //(excepto los de cambio de hora) int ret = 24; bool endFor = false; for (DateTime date = initDate; date < initDateNextDay && !endFor; date = date.AddMinutes(5)) // La fecha se incrementa de 5 en 5 min debido a que en ciertas // zonas geograficas el cambio de hora puede producirse en horas // distintas a horas en punto. (Ejemplo: Producirse el cambio a las // 15:30 en una cierta zona, a las 17:45 en otra, etc.) { //Para evitar que al tratar de convertir en Utc salte una excepción acerca de si su tipo es local y falta atributo sourceTimezone date = DateTime.SpecifyKind(date, DateTimeKind.Unspecified); //Si date es identificado como ambigüo significa que en esa fecha y hora hay cambio de hora (cuando que quita 1 hora) por lo que ese día //tendrá 25 periodos (1 más por la hora repedida del cambio de hora) if (timeZone.IsAmbiguousTime(date)) { endFor = true; ret = 25; } else { try { //Se realiza esta conversión a UTC buscando si salta la excepción. //Esto es porque el día que hay cambio de hora (cuando se añade 1 hora) la hora a la que se le añade "no existe" //por lo que al intentar convertirla a UTC saltará la excepción y sabremos asi que ese día solo tiene 23 periodos //(1 menos por la hora que "no existe") TimeZoneInfo.ConvertTimeToUtc(date, timeZone); } catch (Exception) { endFor = true; ret = 23; } } } return ret; }
private void ProcessMeters(double totalPower,Plant plant, IList<Meter> meterList, IList<SigmaMeasure> sigmaMeasureList, DateTime date, TimeZoneInfo timeZone, int periodsOfDate, string executionResume) { foreach (SigmaMeasure sigmameasure in sigmaMeasureList) { Logger.Info(string.Format("Sigma measures ProdutionDate '{0}' and numPeriod {1}", sigmameasure.ProductionDate, sigmameasure.NumPeriod)); } bool[] periodsWithData = new bool[24]; foreach (var meter in meterList) { Logger.Info(string.Format("Analyzing sigma measures of meter ID '{0}' and local date {1}", meter.IdMeter, date.ToShortDateString())); //Get list of sigma measures of a meter with id 'idMeter' where sigma measure production date (day, month and year) are equal to 'date' var var queryDay = from SigmaMeasure in sigmaMeasureList where SigmaMeasure.ProductionDate.Day == date.Day && SigmaMeasure.ProductionDate.Month == date.Month && SigmaMeasure.ProductionDate.Year == date.Year && SigmaMeasure.Id_Meter.Equals(meter.IdMeter) orderby SigmaMeasure.NumPeriod ascending select SigmaMeasure; if (queryDay.Count() == 0) { Logger.Warn(string.Format("{0} results", queryDay.Count())); executionResume = string.Format("{0}\n\t{1} results", executionResume, queryDay.Count()); } else { if (queryDay.Count()==25) periodsWithData = new bool[25]; Logger.Info(string.Format("{0} results", queryDay.Count())); Logger.Debug(string.Format("1.Entro")); foreach (SigmaMeasure sm in queryDay) { periodsWithData[sm.NumPeriod] = true; } Logger.Debug(string.Format("2.Entro")); DateTime localDate = date.Date; localDate = DateTime.SpecifyKind(localDate, DateTimeKind.Unspecified); Logger.Debug(string.Format("Entro en initial date '{0}' for converting to UTC with timezone '{1}'", localDate, timeZone)); DateTime initialUtcDate = new DateTime(); //If localDate is ambiguous date (in daylight saving time when it is converted to UTC could return 2 datetimes, //.Net method 'ConvertTimeToUtc' return second option. This code lines fix it) if (timeZone.IsAmbiguousTime(localDate)) { Logger.Warn(string.Format("Ambiguous local time found: {0}.", localDate)); executionResume = string.Format("{0}\n\tAmbiguous local time found: {1}.", executionResume, localDate); initialUtcDate = TimeZoneInfo.ConvertTimeToUtc(localDate, timeZone); initialUtcDate.AddHours(-1); Logger.Warn("Ambiguous local time fixed in UTC"); executionResume = string.Format("{0}\n\tAmbiguous local time fixed in UTC", executionResume); } else { Logger.Debug(string.Format("Entro en initial date '{0}' for converting to UTC with timezone '{1}'", localDate,timeZone)); initialUtcDate = TimeZoneInfo.ConvertTimeToUtc(localDate, timeZone); Logger.Debug(string.Format("Local date '{0}' has been converted to UTC: '{1}'",localDate,initialUtcDate)); } int lastNumPeriod = ProcessSigmaMeasure(totalPower, meter, queryDay, initialUtcDate, localDate, executionResume,plant); for (int i = lastNumPeriod + 1; i < periodsOfDate; i++) { Logger.Warn(string.Format("Missing Period Number {0} in meter with ID '{1}' and local date {2}", i, meter.IdMeter, localDate.ToShortDateString())); executionResume = string.Format("{0}\n\tMissing Period Number {1} in meter with ID '{2}' and local date {3}", executionResume, i, meter.IdMeter, localDate.ToShortDateString()); } } } String missingPeriods = ""; for (int i = 0; i < periodsWithData.Count(); i++) { if (periodsWithData[i] == false) { if (missingPeriods.Equals("")) { missingPeriods = string.Format("{0}", i); } else { missingPeriods = string.Format("{0},{1}", missingPeriods, i); } } } if (!missingPeriods.Equals("")) { if (!idPlantWritedInReport) { _wiseReport.AppendFormat("{0};", plant.Id); idPlantWritedInReport = true; } _wiseReport.AppendFormat("{0};", date.ToString(CultureInfo.GetCultureInfo("es-ES"))); _wiseReport.AppendFormat("{0};", missingPeriods); } }
/// <summary> /// Rounds the time to the start of the hour in the specified time zone. /// </summary> /// <param name="time">The time in UTC.</param> /// <param name="timeZone">The time zone. (Can be <see langword="null"/>.)</param> /// <param name="localTime">Out: The time in the specified time zone.</param> /// <returns> /// The start of the day in the specified time zone. The returned value is given in UTC. /// </returns> /// <remarks> /// <para> /// The method returns <paramref name="time"/> unchanged if <paramref name="timeZone"/> is /// <see cref="TimeZoneInfo.Utc"/> or <see langword="null"/>. /// </para> /// <para> /// <strong>Important:</strong> The returned <paramref name="localTime"/> is valid (i.e. has /// an equivalent in UTC), but it may be ambiguous (i.e. has more than one equivalent in /// UTC)! /// </para> /// </remarks> private static DateTime RoundToHour(DateTime time, TimeZoneInfo timeZone, out DateTime localTime) { Debug.Assert(time.Kind == DateTimeKind.Utc, "Time is expected to be UTC."); if (timeZone == null || timeZone.Equals(TimeZoneInfo.Utc)) { localTime = time; return time; } // Convert time to specified time zone. localTime = TimeZoneInfo.ConvertTime(time, timeZone); // Add half an hour for rounding. localTime = localTime.AddMinutes(30); #if SILVERLIGHT // Silverlight supports only conversion Local <-> UTC: localTime = new DateTime(localTime.Year, localTime.Month, localTime.Day, localTime.Hour, 0, 0, DateTimeKind.Local); while (timeZone.IsInvalidTime(localTime)) localTime = localTime.AddHours(1); // When switching back from Daylight Saving Time to normal time, the time in the // local time zone is ambiguous and can be mapped to different time values in UTC. if (timeZone.IsAmbiguousTime(localTime)) { // Map the local time to the time in UTC which is closest to the original value. TimeSpan[] offsets = timeZone.GetAmbiguousTimeOffsets(localTime); TimeSpan minDistance = TimeSpan.MaxValue; DateTime closestTime = new DateTime(); foreach (var offset in offsets) { DateTime timeUtc = localTime - offset; TimeSpan distance = (timeUtc - time).Duration(); if (distance < minDistance) { minDistance = distance; closestTime = timeUtc; } } time = DateTime.SpecifyKind(closestTime, DateTimeKind.Utc); } else { time = TimeZoneInfo.ConvertTime(localTime, TimeZoneInfo.Utc); } #else localTime = new DateTime(localTime.Year, localTime.Month, localTime.Day, localTime.Hour, 0, 0); while (timeZone.IsInvalidTime(localTime)) localTime = localTime.AddHours(1); // When switching back from Daylight Saving Time to normal time, the time in the // local time zone is ambiguous and can be mapped to different time values in UTC. if (timeZone.IsAmbiguousTime(localTime)) { // Map the local time to the time in UTC which is closest to the original value. TimeSpan[] offsets = timeZone.GetAmbiguousTimeOffsets(localTime); TimeSpan minDistance = TimeSpan.MaxValue; DateTime closestTime = new DateTime(); foreach (var offset in offsets) { DateTime timeUtc = localTime - offset; TimeSpan distance = (timeUtc - time).Duration(); if (distance < minDistance) { minDistance = distance; closestTime = timeUtc; } } time = DateTime.SpecifyKind(closestTime, DateTimeKind.Utc); } else { time = TimeZoneInfo.ConvertTime(localTime, timeZone, TimeZoneInfo.Utc); } #endif return time; }