de2bd2f9
 “wangming”
项目初始化
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using System;
namespace NCC.TaskScheduler
{
/// <summary>
/// 处理不同平台时区的区别
/// </summary>
internal static class TimeZoneHelper
{
public static bool IsAmbiguousTime(TimeZoneInfo zone, DateTime ambiguousTime)
{
return zone.IsAmbiguousTime(ambiguousTime.AddTicks(1));
}
public static TimeSpan GetDaylightOffset(TimeZoneInfo zone, DateTime ambiguousDateTime)
{
var offsets = GetAmbiguousOffsets(zone, ambiguousDateTime);
var baseOffset = zone.BaseUtcOffset;
if (offsets[0] != baseOffset) return offsets[0];
return offsets[1];
}
public static DateTimeOffset GetDaylightTimeStart(TimeZoneInfo zone, DateTime invalidDateTime)
{
var dstTransitionDateTime = new DateTime(invalidDateTime.Year, invalidDateTime.Month, invalidDateTime.Day,
invalidDateTime.Hour, invalidDateTime.Minute, 0, 0, invalidDateTime.Kind);
while (zone.IsInvalidTime(dstTransitionDateTime))
{
dstTransitionDateTime = dstTransitionDateTime.AddMinutes(1);
}
var dstOffset = zone.GetUtcOffset(dstTransitionDateTime);
return new DateTimeOffset(dstTransitionDateTime, dstOffset);
}
public static DateTimeOffset GetStandardTimeStart(TimeZoneInfo zone, DateTime ambiguousTime, TimeSpan daylightOffset)
{
var dstTransitionEnd = GetDstTransitionEndDateTime(zone, ambiguousTime);
return new DateTimeOffset(dstTransitionEnd, daylightOffset).ToOffset(zone.BaseUtcOffset);
}
public static DateTimeOffset GetAmbiguousIntervalEnd(TimeZoneInfo zone, DateTime ambiguousTime)
{
var dstTransitionEnd = GetDstTransitionEndDateTime(zone, ambiguousTime);
return new DateTimeOffset(dstTransitionEnd, zone.BaseUtcOffset);
}
public static DateTimeOffset GetDaylightTimeEnd(TimeZoneInfo zone, DateTime ambiguousTime, TimeSpan daylightOffset)
{
var daylightTransitionEnd = GetDstTransitionEndDateTime(zone, ambiguousTime);
return new DateTimeOffset(daylightTransitionEnd.AddTicks(-1), daylightOffset);
}
private static TimeSpan[] GetAmbiguousOffsets(TimeZoneInfo zone, DateTime ambiguousTime)
{
return zone.GetAmbiguousTimeOffsets(ambiguousTime.AddTicks(1));
}
private static DateTime GetDstTransitionEndDateTime(TimeZoneInfo zone, DateTime ambiguousDateTime)
{
var dstTransitionDateTime = new DateTime(ambiguousDateTime.Year, ambiguousDateTime.Month, ambiguousDateTime.Day,
ambiguousDateTime.Hour, ambiguousDateTime.Minute, 0, 0, ambiguousDateTime.Kind);
while (zone.IsAmbiguousTime(dstTransitionDateTime))
{
dstTransitionDateTime = dstTransitionDateTime.AddMinutes(1);
}
return dstTransitionDateTime;
}
}
}
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