我有一个日期字符串,格式如下
Fri, 14 Dec 2012 6:52 am PST
我想将它转换为日期时间.我正在使用DateTime.TryParseExact它来实现它,但我无法读取时区.如果我将字符串(没有时区)更改为
Fri, 14 Dec 2012 6:52 am
并使用
DateTime.TryParseExact(DateString, "ddd, dd MMM yyyy h:mm tt", CultureInfo.InvariantCulture, DateTimeStyles.None,out dt)
有用.我该如何阅读时区.
编辑 - 我从雅虎天气API获取数据(例如http://weather.yahooapis.com/forecastrss?w=2420380).
谢谢.
我不相信有一个自定义日期和时间格式说明符处理时区(与当前UTC偏移相反).即使有,时区缩写也可能含糊不清,因此它们通常很差,作为沟通时区信息的一种方式.不幸的是,它们被广泛使用,当然......
我怀疑你最好创建一个从缩写到"最佳猜测时区"的地图,然后从输入字符串中删除最后一个空格之后的任何内容,并使用它来获取区域.
万一有人想知道,Noda Time也没有处理这个 - 但我希望在某些方面取得进展:)
是的,这是不可能的,但它不是问题的解决方案.所以我所做的是试图找到一个arunlalam的解决方案:)
这是(更新:更正的时区 - /+):
public static string[][] TimeZones = new string[][] {
new string[] {"ACDT", "+1030", "Australian Central Daylight"},
new string[] {"ACST", "+0930", "Australian Central Standard"},
new string[] {"ADT", "-0300", "(US) Atlantic Daylight"},
new string[] {"AEDT", "+1100", "Australian East Daylight"},
new string[] {"AEST", "+1000", "Australian East Standard"},
new string[] {"AHDT", "-0900", ""},
new string[] {"AHST", "-1000", ""},
new string[] {"AST", "-0400", "(US) Atlantic Standard"},
new string[] {"AT", "-0200", "Azores"},
new string[] {"AWDT", "+0900", "Australian West Daylight"},
new string[] {"AWST", "+0800", "Australian West Standard"},
new string[] {"BAT", "+0300", "Bhagdad"},
new string[] {"BDST", "+0200", "British Double Summer"},
new string[] {"BET", "-1100", "Bering Standard"},
new string[] {"BST", "-0300", "Brazil Standard"},
new string[] {"BT", "+0300", "Baghdad"},
new string[] {"BZT2", "-0300", "Brazil Zone 2"},
new string[] {"CADT", "+1030", "Central Australian Daylight"},
new string[] {"CAST", "+0930", "Central Australian Standard"},
new string[] {"CAT", "-1000", "Central Alaska"},
new string[] {"CCT", "+0800", "China Coast"},
new string[] {"CDT", "-0500", "(US) Central Daylight"},
new string[] {"CED", "+0200", "Central European Daylight"},
new string[] {"CET", "+0100", "Central European"},
new string[] {"CST", "-0600", "(US) Central Standard"},
new string[] {"EAST", "+1000", "Eastern Australian Standard"},
new string[] {"EDT", "-0400", "(US) Eastern Daylight"},
new string[] {"EED", "+0300", "Eastern European Daylight"},
new string[] {"EET", "+0200", "Eastern Europe"},
new string[] {"EEST", "+0300", "Eastern Europe Summer"},
new string[] {"EST", "-0500", "(US) Eastern Standard"},
new string[] {"FST", "+0200", "French Summer"},
new string[] {"FWT", "+0100", "French Winter"},
new string[] {"GMT", "-0000", "Greenwich Mean"},
new string[] {"GST", "+1000", "Guam Standard"},
new string[] {"HDT", "-0900", "Hawaii Daylight"},
new string[] {"HST", "-1000", "Hawaii Standard"},
new string[] {"IDLE", "+1200", "Internation Date Line East"},
new string[] {"IDLW", "-1200", "Internation Date Line West"},
new string[] {"IST", "+0530", "Indian Standard"},
new string[] {"IT", "+0330", "Iran"},
new string[] {"JST", "+0900", "Japan Standard"},
new string[] {"JT", "+0700", "Java"},
new string[] {"MDT", "-0600", "(US) Mountain Daylight"},
new string[] {"MED", "+0200", "Middle European Daylight"},
new string[] {"MET", "+0100", "Middle European"},
new string[] {"MEST", "+0200", "Middle European Summer"},
new string[] {"MEWT", "+0100", "Middle European Winter"},
new string[] {"MST", "-0700", "(US) Mountain Standard"},
new string[] {"MT", "+0800", "Moluccas"},
new string[] {"NDT", "-0230", "Newfoundland Daylight"},
new string[] {"NFT", "-0330", "Newfoundland"},
new string[] {"NT", "-1100", "Nome"},
new string[] {"NST", "+0630", "North Sumatra"},
new string[] {"NZ", "+1100", "New Zealand "},
new string[] {"NZST", "+1200", "New Zealand Standard"},
new string[] {"NZDT", "+1300", "New Zealand Daylight"},
new string[] {"NZT", "+1200", "New Zealand"},
new string[] {"PDT", "-0700", "(US) Pacific Daylight"},
new string[] {"PST", "-0800", "(US) Pacific Standard"},
new string[] {"ROK", "+0900", "Republic of Korea"},
new string[] {"SAD", "+1000", "South Australia Daylight"},
new string[] {"SAST", "+0900", "South Australia Standard"},
new string[] {"SAT", "+0900", "South Australia Standard"},
new string[] {"SDT", "+1000", "South Australia Daylight"},
new string[] {"SST", "+0200", "Swedish Summer"},
new string[] {"SWT", "+0100", "Swedish Winter"},
new string[] {"USZ3", "+0400", "USSR Zone 3"},
new string[] {"USZ4", "+0500", "USSR Zone 4"},
new string[] {"USZ5", "+0600", "USSR Zone 5"},
new string[] {"USZ6", "+0700", "USSR Zone 6"},
new string[] {"UT", "-0000", "Universal Coordinated"},
new string[] {"UTC", "-0000", "Universal Coordinated"},
new string[] {"UZ10", "+1100", "USSR Zone 10"},
new string[] {"WAT", "-0100", "West Africa"},
new string[] {"WET", "-0000", "West European"},
new string[] {"WST", "+0800", "West Australian Standard"},
new string[] {"YDT", "-0800", "Yukon Daylight"},
new string[] {"YST", "-0900", "Yukon Standard"},
new string[] {"ZP4", "+0400", "USSR Zone 3"},
new string[] {"ZP5", "+0500", "USSR Zone 4"},
new string[] {"ZP6", "+0600", "USSR Zone 5"}
};
以及返回可解析偏移量的函数:
public static string TimeZoneToOffset(string tz)
{
tz = tz.ToUpper().Trim();
for (int i = 0 ; i < TimeZones.Length ; i++)
{
if (((string)((string[])TimeZones.GetValue(i)).GetValue(0)) == tz)
{
return ((string)((string[])TimeZones.GetValue(i)).GetValue(1));
}
}
return System.TimeZone.CurrentTimeZone.GetUtcOffset(DateTime.Now).ToString()
.Replace(":", "").Substring(0, 5);
}
在这里找到:http: //bytes.com/topic/c-sharp/answers/214648-how-do-i-parse-date-w-time-zone
希望它有效:)祝你有愉快的一天