将UTC DateTime转换为另一个时区

5 回答

• 0

  看看DateTimeOffset结构：

  // user-specified time zone
  TimeZoneInfo southPole =
      TimeZoneInfo.FindSystemTimeZoneById("Antarctica/South Pole Standard Time");
  
  // an UTC DateTime
  DateTime utcTime = new DateTime(2007, 07, 12, 06, 32, 00, DateTimeKind.Utc);
  
  // DateTime with offset
  DateTimeOffset dateAndOffset =
      new DateTimeOffset(utcTime, southPole.GetUtcOffset(utcTime));
  
  Console.WriteLine(dateAndOffset);
  

  对于夏令时，请参阅TimeZoneInfo.IsDaylightSavingTime方法 .

  bool isDst = southpole.IsDaylightSavingTime(DateTime.UtcNow);
  

  回复于 2024-04-25T07:20:54+08:00
• 20

  最好的方法是使用TimeZoneInfo.ConvertTimeFromUtc .

  // you said you had these already
  DateTime utc = new DateTime(2014, 6, 4, 12, 34, 0);
  TimeZoneInfo tzi = TimeZoneInfo.FindSystemTimeZoneById("Pacific Standard Time");
  
  // it's a simple one-liner
  DateTime pacific = TimeZoneInfo.ConvertTimeFromUtc(utc, tzi);
  

  唯一的问题是传入的 DateTime 值可能没有 DateTimeKind.Local 类型 . 它必须是 Utc 或 Unspecified .

  回复于 2024-04-25T07:20:54+08:00
• 29

  如果要将DateTimeOffset转换为另一个DateTimeOffset，可以在TimeZoneInfo中使用专用函数：

  DateTimeOffset newTime = TimeZoneInfo.ConvertTime(
      DateTimeOffset.UtcNow, 
      TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time")
  );
  

  回复于 2024-04-25T07:20:54+08:00
• 18

  Antartica答案仅适用于匹配UTC的时区 . 我对这个 DateTimeOffset 函数造成了很大的创伤，经过几个小时的反复试验，我设法生成了一个适用于所有时区的实用转换扩展函数 .

  static public class DateTimeFunctions
  {
      static public DateTimeOffset ConvertUtcTimeToTimeZone(this DateTime dateTime, string toTimeZoneDesc)
      {
          if (dateTime.Kind != DateTimeKind.Utc) throw new Exception("dateTime needs to have Kind property set to Utc");
          var toUtcOffset = TimeZoneInfo.FindSystemTimeZoneById(toTimeZoneDesc).GetUtcOffset(dateTime);
          var convertedTime = DateTime.SpecifyKind(dateTime.Add(toUtcOffset), DateTimeKind.Unspecified);
          return new DateTimeOffset(convertedTime, toUtcOffset);
      }
  }
  

  例：

  var currentTimeInPacificTime = DateTime.UtcNow.ConvertUtcTimeToTimeZone("Pacific Standard Time");
  

  回复于 2024-04-25T07:20:54+08:00
• 12

  //  TO get Currrent Time in current Time Zone of your System
  
          var dt = DateTime.Now;
  
          Console.WriteLine(dt);
  
          // Display Time Zone of your System
  
          Console.WriteLine(TimeZoneInfo.Local);
  
          // Convert Current Date Time to UTC Date Time
  
          var utc = TimeZoneInfo.ConvertTimeToUtc(dt, TimeZoneInfo.Local);
  
          Console.WriteLine(utc);
  
          // Convert UTC Time to Current Time Zone
  
          DateTime pacific = TimeZoneInfo.ConvertTimeFromUtc(utc, TimeZoneInfo.Local);
  
          Console.WriteLine(pacific);
  
          Console.ReadLine();
  

  回复于 2024-04-25T07:20:54+08:00