我有一个JSON文件，它有time_zone参数。它有London, Casablanca, Arizona, Pacific Time (US & Canada)等值。基于time_zone，我想得到该时区的DateTime结果。
例如，
Current time = 8/3/2015 4:00:00 PM
If time_zone = Central Time (US & Canada) then result should be 8/3/2015 3:00:00 PM,
If time_zone = Pacific Time (US & Canada) then result should be 8/3/2015 1:00:00 PM,
If time_zone = London then result should be 8/3/2015 9:00:00 PM and so on.
我想显示当前时间以及给定时区的时间。
我试着按照下面的方法为受尊重的时区争取时间，但这是一个错误。
代码：Works
DateTime timeUtc = DateTime.Now;
TimeZoneInfo cstZone = TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time");
var b = TimeZoneInfo.ConvertTime(timeUtc, cstZone);
错误：The time zone ID 'Central Time (US & Canada)' was not found on the local computer.
TimeZoneInfo cstZone = TimeZoneInfo.FindSystemTimeZoneById("Central Time (US & Canada)");
var b = TimeZoneInfo.ConvertTime(timeUtc , cstZone);
也尝试过，但出现了相同的错误，
var c = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(timeUtc, "Central Time (US & Canada)");
我的问题是，time_zone的值是Central Time (US & Canada), Pacific Time (US & Canada), etc.格式的，我必须处理它以及像London, Casablanca这样的不同时区。如何处理这种情况。
如果使用docker，请使用此
FROM mcr.microsoft.com/dotnet/core/aspnet:3.1-alpine
RUN apk add --no-cache tzdata
参考：https://www.stevejgordon.co.uk/timezonenotfoundexception-in-alpine-based-docker-images
否则就需要iana_timezone
calling fn:
var timezone = "Asia/Kolkata";
var dtUtc = GetUtcByTimezone(timezone, utc);
public static DateTimeOffset GetUtcByTimezone(string timezone, DateTime? dateTime = null)
{
dateTime ??= DateTime.UtcNow;
var timeZoneInfo = TZConvert.GetTimeZoneInfo(timezone);
var dtUtc = TimeZoneInfo.ConvertTimeToUtc(dateTime.Value, timeZoneInfo);
return dtUtc;
}
假设文件中的时区标识符来自Rails，那么您基本上是在问这个问题的反面。
与该问题的答案类似，我们将使用Rails映射以及CLDR映射来获得C#中的Rails-to-Windows映射常量。
public static class TZConvert
{
public static string RailsToWindows(string railsTimeZoneId)
{
return RailsWindowsMapping.ContainsKey(railsTimeZoneId)
? RailsWindowsMapping[railsTimeZoneId]
: null;
}
private static readonly IReadOnlyDictionary<string, string> RailsWindowsMapping =
new Dictionary<string, string>
{
{"Abu Dhabi", "Arabian Standard Time"},
{"Adelaide", "Cen. Australia Standard Time"},
{"Alaska", "Alaskan Standard Time"},
{"Almaty", "Central Asia Standard Time"},
{"American Samoa", "UTC-11"},
{"Amsterdam", "W. Europe Standard Time"},
{"Arizona", "US Mountain Standard Time"},
{"Astana", "Bangladesh Standard Time"},
{"Athens", "GTB Standard Time"},
{"Atlantic Time (Canada)", "Atlantic Standard Time"},
{"Auckland", "New Zealand Standard Time"},
{"Azores", "Azores Standard Time"},
{"Baghdad", "Arabic Standard Time"},
{"Baku", "Azerbaijan Standard Time"},
{"Bangkok", "SE Asia Standard Time"},
{"Beijing", "China Standard Time"},
{"Belgrade", "Central Europe Standard Time"},
{"Berlin", "W. Europe Standard Time"},
{"Bern", "W. Europe Standard Time"},
{"Bogota", "SA Pacific Standard Time"},
{"Brasilia", "E. South America Standard Time"},
{"Bratislava", "Central Europe Standard Time"},
{"Brisbane", "E. Australia Standard Time"},
{"Brussels", "Romance Standard Time"},
{"Bucharest", "GTB Standard Time"},
{"Budapest", "Central Europe Standard Time"},
{"Buenos Aires", "Argentina Standard Time"},
{"Cairo", "Egypt Standard Time"},
{"Canberra", "AUS Eastern Standard Time"},
{"Cape Verde Is.", "Cape Verde Standard Time"},
{"Caracas", "Venezuela Standard Time"},
{"Casablanca", "Morocco Standard Time"},
{"Central America", "Central America Standard Time"},
{"Central Time (US & Canada)", "Central Standard Time"},
{"Chennai", "India Standard Time"},
{"Chihuahua", "Mountain Standard Time (Mexico)"},
{"Chongqing", "China Standard Time"},
{"Copenhagen", "Romance Standard Time"},
{"Darwin", "AUS Central Standard Time"},
{"Dhaka", "Bangladesh Standard Time"},
{"Dublin", "GMT Standard Time"},
{"Eastern Time (US & Canada)", "Eastern Standard Time"},
{"Edinburgh", "GMT Standard Time"},
{"Ekaterinburg", "Ekaterinburg Standard Time"},
{"Fiji", "Fiji Standard Time"},
{"Georgetown", "SA Western Standard Time"},
{"Greenland", "Greenland Standard Time"},
{"Guadalajara", "Central Standard Time (Mexico)"},
{"Guam", "West Pacific Standard Time"},
{"Hanoi", "SE Asia Standard Time"},
{"Harare", "South Africa Standard Time"},
{"Hawaii", "Hawaiian Standard Time"},
{"Helsinki", "FLE Standard Time"},
{"Hobart", "Tasmania Standard Time"},
{"Hong Kong", "China Standard Time"},
{"Indiana (East)", "US Eastern Standard Time"},
{"International Date Line West", "UTC-11"},
{"Irkutsk", "North Asia East Standard Time"},
{"Islamabad", "Pakistan Standard Time"},
{"Istanbul", "Turkey Standard Time"},
{"Jakarta", "SE Asia Standard Time"},
{"Jerusalem", "Israel Standard Time"},
{"Kabul", "Afghanistan Standard Time"},
{"Kaliningrad", "Kaliningrad Standard Time"},
{"Kamchatka", "Russia Time Zone 11"},
{"Karachi", "Pakistan Standard Time"},
{"Kathmandu", "Nepal Standard Time"},
{"Kolkata", "India Standard Time"},
{"Krasnoyarsk", "North Asia Standard Time"},
{"Kuala Lumpur", "Singapore Standard Time"},
{"Kuwait", "Arab Standard Time"},
{"Kyiv", "FLE Standard Time"},
{"La Paz", "SA Western Standard Time"},
{"Lima", "SA Pacific Standard Time"},
{"Lisbon", "GMT Standard Time"},
{"Ljubljana", "Central Europe Standard Time"},
{"London", "GMT Standard Time"},
{"Madrid", "Romance Standard Time"},
{"Magadan", "Magadan Standard Time"},
{"Marshall Is.", "UTC+12"},
{"Mazatlan", "Mountain Standard Time (Mexico)"},
{"Melbourne", "AUS Eastern Standard Time"},
{"Mexico City", "Central Standard Time (Mexico)"},
{"Mid-Atlantic", "UTC-02"},
{"Midway Island", "UTC-11"},
{"Minsk", "Belarus Standard Time"},
{"Monrovia", "Greenwich Standard Time"},
{"Monterrey", "Central Standard Time (Mexico)"},
{"Montevideo", "Montevideo Standard Time"},
{"Moscow", "Russian Standard Time"},
{"Mountain Time (US & Canada)", "Mountain Standard Time"},
{"Mumbai", "India Standard Time"},
{"Muscat", "Arabian Standard Time"},
{"Nairobi", "E. Africa Standard Time"},
{"New Caledonia", "Central Pacific Standard Time"},
{"New Delhi", "India Standard Time"},
{"Newfoundland", "Newfoundland Standard Time"},
{"Novosibirsk", "N. Central Asia Standard Time"},
{"Nuku'alofa", "Tonga Standard Time"},
{"Osaka", "Tokyo Standard Time"},
{"Pacific Time (US & Canada)", "Pacific Standard Time"},
{"Paris", "Romance Standard Time"},
{"Perth", "W. Australia Standard Time"},
{"Port Moresby", "West Pacific Standard Time"},
{"Prague", "Central Europe Standard Time"},
{"Pretoria", "South Africa Standard Time"},
{"Quito", "SA Pacific Standard Time"},
{"Rangoon", "Myanmar Standard Time"},
{"Riga", "FLE Standard Time"},
{"Riyadh", "Arab Standard Time"},
{"Rome", "W. Europe Standard Time"},
{"Samara", "Russia Time Zone 3"},
{"Samoa", "Samoa Standard Time"},
{"Santiago", "Pacific SA Standard Time"},
{"Sapporo", "Tokyo Standard Time"},
{"Sarajevo", "Central European Standard Time"},
{"Saskatchewan", "Canada Central Standard Time"},
{"Seoul", "Korea Standard Time"},
{"Singapore", "Singapore Standard Time"},
{"Skopje", "Central European Standard Time"},
{"Sofia", "FLE Standard Time"},
{"Solomon Is.", "Central Pacific Standard Time"},
{"Srednekolymsk", "Russia Time Zone 10"},
{"Sri Jayawardenepura", "Sri Lanka Standard Time"},
{"St. Petersburg", "Russian Standard Time"},
{"Stockholm", "W. Europe Standard Time"},
{"Sydney", "AUS Eastern Standard Time"},
{"Taipei", "Taipei Standard Time"},
{"Tallinn", "FLE Standard Time"},
{"Tashkent", "West Asia Standard Time"},
{"Tbilisi", "Georgian Standard Time"},
{"Tehran", "Iran Standard Time"},
{"Tijuana", "Pacific Standard Time"},
{"Tokelau Is.", "Tonga Standard Time"},
{"Tokyo", "Tokyo Standard Time"},
{"Ulaanbaatar", "Ulaanbaatar Standard Time"},
{"Urumqi", "Central Asia Standard Time"},
{"UTC", "UTC"},
{"Vienna", "W. Europe Standard Time"},
{"Vilnius", "FLE Standard Time"},
{"Vladivostok", "Vladivostok Standard Time"},
{"Volgograd", "Russian Standard Time"},
{"Warsaw", "Central European Standard Time"},
{"Wellington", "New Zealand Standard Time"},
{"West Central Africa", "W. Central Africa Standard Time"},
{"Yakutsk", "Yakutsk Standard Time"},
{"Yerevan", "Caucasus Standard Time"},
{"Zagreb", "Central European Standard Time"}
};
}
您现在可以将其与TimeZoneInfo一起使用，如下所示：
string windowsZoneId = TZConvert.RailsToWindows("Central Time (US & Canada)");
TimeZoneInfo central = TimeZoneInfo.FindSystemTimeZoneById(windowsZoneId);
注意以下几点：
Rails映射似乎相对固定，但CLDR映射偶尔会更新。您可能需要不时地重新访问，以确保任何新的时区都得到了适当的映射。
Rails时区
"Chatham Is."当前无法映射到任何Windows时区。(Windows中没有为查塔姆群岛定义时区。(如果你想更准确并支持所有区域，你可以从Rails转到IANA/TZDB时区，而不是Windows时区。然后，您可以将Noda Time与它的本地TZDB支持一起使用。这也将消除使用CLDR映射的需要。
我没有解决这个问题，但我使用https://stackoverflow.com/a/6144229/7670060.希望这会有所帮助。
步骤1:
在计算机中查找时区列表。
var timeZones = TimeZoneInfo.GetSystemTimeZones();
步骤2:
public string OlsonTimeZoneToTimeZoneInfo(string timeInfo)
{
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" }
};
string timeInfoKey = string.Empty;
if (olsonWindowsTimes.ContainsValue(timeInfo))
timeInfoKey = olsonWindowsTimes.FirstOrDefault(x => x.Value == timeInfo).Key;
return timeInfoKey;
}
第3步：
var finalResult=ConvertTimeZone(Datetime.UtcNow,"Central Standard Time");
public DateTime ConvertTimeZone(DateTime dateTime, string timeInfo)
{
var result = OlsonTimeZoneToTimeZoneInfo(timeInfo);
if (result != null)
{
var finalTimeZone = TimeZoneInfo.FindSystemTimeZoneById(result);
dateTime = (dateTime != null ? TimeZoneInfo.ConvertTimeFromUtc(dateTime != null ? dateTime : DateTime.UtcNow, finalTimeZone) : DateTime.UtcNow);
}
return dateTime;
}
public static bool isValidTimeZoneId(string timeZoneId)
{
if (string.IsNullOrEmpty(timeZoneId) || string.IsNullOrWhiteSpace(timeZoneId))
return false;
ReadOnlyCollection<TimeZoneInfo> tz;
tz = TimeZoneInfo.GetSystemTimeZones();
return tz.Any(x => x.Id == timeZoneId);
}
我首先通过制作一个快速验证器来解决这个问题。