NET4.6下的UTC時間轉換

int UTCSecond = (int)((DateTimeOffset)DateTime.SpecifyKind(DateTime.Now, DateTimeKind.Local)).ToUnixTimeSeconds(); DateTime time = DateTimeOffset.FromUnixTimeSeconds(UTCSecond).DateTime; Console.WriteLine("當前utc:{0},秒數:{1},換算時間:{2}", DateTimeOffset.Now, UTCSecond, time.ToString("F")); UTCSecond = Q.Helper.TimeHelper.ToUTCSecond(DateTime.Now); time = DateTimeOffset.FromUnixTimeSeconds(UTCSecond).DateTime; Console.WriteLine("當前utc:{0},秒數:{1},換算時間:{2}", DateTimeOffset.Now, UTCSecond, time.ToString("F")); Console.Read();

 

 

 

QCOMMON請使用NUGET包管理器搜索安裝 QCommon

基本原理以下

 

/// <summary> /// UTC時間 /// </summary> static readonly DateTime UTC = TimeZoneInfo.ConvertTimeToUtc(new DateTime(1970, 1, 1), TimeZoneInfo.Utc); /// <summary> /// 時間轉UTC秒 /// </summary> /// <param name="dateTime">時間（當前時區）</param> /// <returns>UTC秒</returns> public static int ToUTCSecond(this DateTime dateTime) { return (int)dateTime.ToUniversalTime().Subtract(UTC).TotalSeconds; }   /// <summary> /// UTC秒轉當地時間 /// </summary> /// <param name="second">秒數</param> /// <returns>當時時間</returns> public static DateTime ToDateTime(this int second) { return UTC.AddSeconds(second).ToLocalTime(); }