来自Olson时区的.NET TimeZoneInfo
如何将以下内容转换为System.TimeZone或System.TimeZoneInfo？
{
"timeZone": "America/Los_Angeles",
"currentOffsetMs": -25200000
}
这是我从第三方Web服务获取的数据。
我假设偏移量是与UTC的差值，并且我被告知“America / Los_Angeles”是奥尔森时区。 Java在解析Java时区时没有问题，但我需要将它解析为C＃TimeZoneInfo对象。
此Unicode.org页面具有“Olson时区到Win32时区”表。 从那里，我创建了一个漂亮的小C＃帮助函数，用于将Olson时区字符串映射到.NET TimeZoneInfo中：
/// <summary>
/// Converts an Olson time zone ID to a Windows time zone ID.
/// </summary>
/// <param name="olsonTimeZoneId">An Olson time zone ID. See http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/zone_tzid.html. </param>
/// <returns>
/// The TimeZoneInfo corresponding to the Olson time zone ID,
/// or null if you passed in an invalid Olson time zone ID.
/// </returns>
/// <remarks>
/// See http://unicode.org/repos/cldr-tmp/trunk/diff/supplemental/zone_tzid.html
/// </remarks>
public static TimeZoneInfo OlsonTimeZoneToTimeZoneInfo(string olsonTimeZoneId)
{
var olsonWindowsTimes = new Dictionary<string, string>()
{
{ "Africa/Bangui", "W. Central Africa Standard Time" },
{ "Africa/Cairo", "Egypt Standard Time" },
{ "Africa/Casablanca", "Morocco Standard Time" },
{ "Africa/Harare", "South Africa Standard Time" },
{ "Africa/Johannesburg", "South Africa Standard Time" },
{ "Africa/Lagos", "W. Central Africa Standard Time" },
{ "Africa/Monrovia", "Greenwich Standard Time" },
{ "Africa/Nairobi", "E. Africa Standard Time" },
{ "Africa/Windhoek", "Namibia Standard Time" },
{ "America/Anchorage", "Alaskan Standard Time" },
{ "America/Argentina/San_Juan", "Argentina Standard Time" },
{ "America/Asuncion", "Paraguay Standard Time" },
{ "America/Bahia", "Bahia Standard Time" },
{ "America/Bogota", "SA Pacific Standard Time" },
{ "America/Buenos_Aires", "Argentina Standard Time" },
{ "America/Caracas", "Venezuela Standard Time" },
{ "America/Cayenne", "SA Eastern Standard Time" },
{ "America/Chicago", "Central Standard Time" },
{ "America/Chihuahua", "Mountain Standard Time (Mexico)" },
{ "America/Cuiaba", "Central Brazilian Standard Time" },
{ "America/Denver", "Mountain Standard Time" },
{ "America/Fortaleza", "SA Eastern Standard Time" },
{ "America/Godthab", "Greenland Standard Time" },
{ "America/Guatemala", "Central America Standard Time" },
{ "America/Halifax", "Atlantic Standard Time" },
{ "America/Indianapolis", "US Eastern Standard Time" },
{ "America/Indiana/Indianapolis", "US Eastern Standard Time" },
{ "America/La_Paz", "SA Western Standard Time" },
{ "America/Los_Angeles", "Pacific Standard Time" },
{ "America/Mexico_City", "Mexico Standard Time" },
{ "America/Montevideo", "Montevideo Standard Time" },
{ "America/New_York", "Eastern Standard Time" },
{ "America/Noronha", "UTC-02" },
{ "America/Phoenix", "US Mountain Standard Time" },
{ "America/Regina", "Canada Central Standard Time" },
{ "America/Santa_Isabel", "Pacific Standard Time (Mexico)" },
{ "America/Santiago", "Pacific SA Standard Time" },
{ "America/Sao_Paulo", "E. South America Standard Time" },
{ "America/St_Johns", "Newfoundland Standard Time" },
{ "America/Tijuana", "Pacific Standard Time" },
{ "Antarctica/McMurdo", "New Zealand Standard Time" },
{ "Atlantic/South_Georgia", "UTC-02" },
{ "Asia/Almaty", "Central Asia Standard Time" },
{ "Asia/Amman", "Jordan Standard Time" },
{ "Asia/Baghdad", "Arabic Standard Time" },
{ "Asia/Baku", "Azerbaijan Standard Time" },
{ "Asia/Bangkok", "SE Asia Standard Time" },
{ "Asia/Beirut", "Middle East Standard Time" },
{ "Asia/Calcutta", "India Standard Time" },
{ "Asia/Colombo", "Sri Lanka Standard Time" },
{ "Asia/Damascus", "Syria Standard Time" },
{ "Asia/Dhaka", "Bangladesh Standard Time" },
{ "Asia/Dubai", "Arabian Standard Time" },
{ "Asia/Irkutsk", "North Asia East Standard Time" },
{ "Asia/Jerusalem", "Israel Standard Time" },
{ "Asia/Kabul", "Afghanistan Standard Time" },
{ "Asia/Kamchatka", "Kamchatka Standard Time" },
{ "Asia/Karachi", "Pakistan Standard Time" },
{ "Asia/Katmandu", "Nepal Standard Time" },
{ "Asia/Kolkata", "India Standard Time" },
{ "Asia/Krasnoyarsk", "North Asia Standard Time" },
{ "Asia/Kuala_Lumpur", "Singapore Standard Time" },
{ "Asia/Kuwait", "Arab Standard Time" },
{ "Asia/Magadan", "Magadan Standard Time" },
{ "Asia/Muscat", "Arabian Standard Time" },
{ "Asia/Novosibirsk", "N. Central Asia Standard Time" },
{ "Asia/Oral", "West Asia Standard Time" },
{ "Asia/Rangoon", "Myanmar Standard Time" },
{ "Asia/Riyadh", "Arab Standard Time" },
{ "Asia/Seoul", "Korea Standard Time" },
{ "Asia/Shanghai", "China Standard Time" },
{ "Asia/Singapore", "Singapore Standard Time" },
{ "Asia/Taipei", "Taipei Standard Time" },
{ "Asia/Tashkent", "West Asia Standard Time" },
{ "Asia/Tbilisi", "Georgian Standard Time" },
{ "Asia/Tehran", "Iran Standard Time" },
{ "Asia/Tokyo", "Tokyo Standard Time" },
{ "Asia/Ulaanbaatar", "Ulaanbaatar Standard Time" },
{ "Asia/Vladivostok", "Vladivostok Standard Time" },
{ "Asia/Yakutsk", "Yakutsk Standard Time" },
{ "Asia/Yekaterinburg", "Ekaterinburg Standard Time" },
{ "Asia/Yerevan", "Armenian Standard Time" },
{ "Atlantic/Azores", "Azores Standard Time" },
{ "Atlantic/Cape_Verde", "Cape Verde Standard Time" },
{ "Atlantic/Reykjavik", "Greenwich Standard Time" },
{ "Australia/Adelaide", "Cen. Australia Standard Time" },
{ "Australia/Brisbane", "E. Australia Standard Time" },
{ "Australia/Darwin", "AUS Central Standard Time" },
{ "Australia/Hobart", "Tasmania Standard Time" },
{ "Australia/Perth", "W. Australia Standard Time" },
{ "Australia/Sydney", "AUS Eastern Standard Time" },
{ "Etc/GMT", "UTC" },
{ "Etc/GMT+11", "UTC-11" },
{ "Etc/GMT+12", "Dateline Standard Time" },
{ "Etc/GMT+2", "UTC-02" },
{ "Etc/GMT-12", "UTC+12" },
{ "Europe/Amsterdam", "W. Europe Standard Time" },
{ "Europe/Athens", "GTB Standard Time" },
{ "Europe/Belgrade", "Central Europe Standard Time" },
{ "Europe/Berlin", "W. Europe Standard Time" },
{ "Europe/Brussels", "Romance Standard Time" },
{ "Europe/Budapest", "Central Europe Standard Time" },
{ "Europe/Dublin", "GMT Standard Time" },
{ "Europe/Helsinki", "FLE Standard Time" },
{ "Europe/Istanbul", "GTB Standard Time" },
{ "Europe/Kiev", "FLE Standard Time" },
{ "Europe/London", "GMT Standard Time" },
{ "Europe/Minsk", "E. Europe Standard Time" },
{ "Europe/Moscow", "Russian Standard Time" },
{ "Europe/Paris", "Romance Standard Time" },
{ "Europe/Sarajevo", "Central European Standard Time" },
{ "Europe/Warsaw", "Central European Standard Time" },
{ "Indian/Mauritius", "Mauritius Standard Time" },
{ "Pacific/Apia", "Samoa Standard Time" },
{ "Pacific/Auckland", "New Zealand Standard Time" },
{ "Pacific/Fiji", "Fiji Standard Time" },
{ "Pacific/Guadalcanal", "Central Pacific Standard Time" },
{ "Pacific/Guam", "West Pacific Standard Time" },
{ "Pacific/Honolulu", "Hawaiian Standard Time" },
{ "Pacific/Pago_Pago", "UTC-11" },
{ "Pacific/Port_Moresby", "West Pacific Standard Time" },
{ "Pacific/Tongatapu", "Tonga Standard Time" }
};
var windowsTimeZoneId = default(string);
var windowsTimeZone = default(TimeZoneInfo);
if (olsonWindowsTimes.TryGetValue(olsonTimeZoneId, out windowsTimeZoneId))
{
try { windowsTimeZone = TimeZoneInfo.FindSystemTimeZoneById(windowsTimeZoneId); }
catch (TimeZoneNotFoundException) { }
catch (InvalidTimeZoneException) { }
}
return windowsTimeZone;
}
这里是使用NodaTime的反向映射（tzdb - > windows）函数：
using NodaTime;
using NodaTime.TimeZones;
...
public TimeZoneInfo GetTimeZoneInfoForTzdbId(string tzdbId)
{
var mappings = TzdbDateTimeZoneSource.Default.WindowsMapping.MapZones;
var map = mappings.FirstOrDefault(x =>
x.TzdbIds.Any(z => z.Equals(tzdbId, StringComparison.OrdinalIgnoreCase)));
return map == null ? null : TimeZoneInfo.FindSystemTimeZoneById(map.WindowsId);
}
请注意，有可能存在多个映射（在这种情况下，这只是使用找到的第一个映射），或者根本没有映射（其中返回null）。
在最常用的时区，这应该工作得很好。 但更好的解决方案是根本跳过使用TimeZoneInfo ，并在整个应用程序中直接使用NodaTime直接使用TZDB区域。
另请参阅：如何在Windows和IANA时区之间进行翻译？
你可能想看看Jon Skeet的Noda-Time，完全放弃TimeZoneInfo。 Noda-Time使用Olson时区，因此您的映射将是小菜一碟。 还有其他原因可能会导致您需要使用它：
无论如何，DateTime有什么问题？
所以我的问题是使用Noda-Time的结果
链接地址: http://www.djcxy.com/p/40903.html上一篇: .NET TimeZoneInfo from Olson time zone
下一篇: How do I get Ruby to parse time as if it were in a different time zone?