Update reader.

DataUtils/Calendar.cs

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+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Runtime.InteropServices;
+using System.Linq;
+using System.Reflection;
+
+namespace DataUtils
+{
+	[ComVisible (true)]
+	[ClassInterface (ClassInterfaceType.AutoDual)]
+	public class _I_Calendar
+	{
+		private DateTime _utcDateTime;           // 存储 UTC 时间（所有算术的基础）
+		private Calendar _calendar;               // 当前日历系统
+		private TimeZoneInfo _timeZone;           // 当前时区
+		private bool _is24HourClock;              // true = 24小时制，false = 12小时制
+		private List<string> _languages;          // 语言优先级列表
+		private string _numeralSystem = "Latn";   // 数字系统（简化实现，仅存储）
+		private const long TicksPerNanosecond = 100;  // 1 tick = 100 ns
+
+		// 缓存的本地时间（根据时区从 _utcDateTime 转换得到）
+		private DateTime _localDateTime;
+
+		// 更新本地时间（当 UTC 时间或时区改变时调用）
+		private void UpdateLocalDateTime ()
+		{
+			_localDateTime = TimeZoneInfo.ConvertTimeFromUtc (_utcDateTime, _timeZone);
+		}
+
+		// 当本地时间被修改后，同步回 UTC 时间
+		private void UpdateUtcDateTime ()
+		{
+			_utcDateTime = TimeZoneInfo.ConvertTimeToUtc (_localDateTime, _timeZone);
+		}
+
+		// 辅助：日历字段的读取
+		private int GetCalendarField (Func<Calendar, DateTime, int> fieldGetter)
+		{
+			return fieldGetter (_calendar, _localDateTime);
+		}
+
+		// 辅助：日历字段的设置（返回新的本地时间）
+		private DateTime SetCalendarField (DateTime currentLocal, Func<Calendar, DateTime, int, DateTime> fieldSetter, int value)
+		{
+			return fieldSetter (_calendar, currentLocal, value);
+		}
+
+		// 根据日历标识符创建日历实例
+		private static Calendar CreateCalendar (string calendarId)
+		{
+			switch (calendarId)
+			{
+				case "GregorianCalendar":
+					return new GregorianCalendar ();
+				case "HebrewCalendar":
+					return new HebrewCalendar ();
+				case "HijriCalendar":
+					return new HijriCalendar ();
+				case "JapaneseCalendar":
+					return new JapaneseCalendar ();
+				case "KoreanCalendar":
+					return new KoreanCalendar ();
+				case "TaiwanCalendar":
+					return new TaiwanCalendar ();
+				case "ThaiBuddhistCalendar":
+					return new ThaiBuddhistCalendar ();
+				case "UmAlQuraCalendar":
+					return new UmAlQuraCalendar ();
+				// 可根据需要增加更多日历
+				default:
+					return new GregorianCalendar ();
+			}
+		}
+
+		private _I_Language GetFormatCulture ()
+		{
+			if (_languages == null || _languages.Count == 0)
+				return new _I_Language (CultureInfo.CurrentCulture.Name);
+			try
+			{
+				return new _I_Language (_languages [0]);
+			}
+			catch
+			{
+				return new _I_Language (CultureInfo.CurrentCulture.Name);
+			}
+		}
+
+		private List<object> JsArrayToList (object jsArray)
+		{
+			var result = new List<object> ();
+
+			if (jsArray == null)
+				return result;
+
+			// JS Array 有 length 属性和数字索引器
+			var type = jsArray.GetType ();
+
+			int length = (int)type.InvokeMember (
+				"length",
+				BindingFlags.GetProperty,
+				null,
+				jsArray,
+				null);
+
+			for (int i = 0; i < length; i++)
+			{
+				object value = type.InvokeMember (
+					i.ToString (),
+					BindingFlags.GetProperty,
+					null,
+					jsArray,
+					null);
+
+				result.Add (value);
+			}
+
+			return result;
+		}
+
+		public _I_Calendar ()
+			: this (new List<string> { CultureInfo.CurrentCulture.Name },
+				   "GregorianCalendar", "24HourClock", TimeZoneInfo.Local.Id)
+		{
+		}
+
+		public _I_Calendar (object languages)
+			: this (languages, "GregorianCalendar", "24HourClock", TimeZoneInfo.Local.Id)
+		{
+		}
+
+		public _I_Calendar (object languages, string calendar, string clock)
+			: this (languages, calendar, clock, TimeZoneInfo.Local.Id)
+		{
+		}
+
+		public _I_Calendar (object languages, string calendar, string clock, string timeZoneId)
+		{
+			_languages = languages == null ? new List<string> () : new List<string> (JsArrayToList (languages).Select (e => e as string));
+			if (_languages.Count == 0)
+				_languages.Add (CultureInfo.CurrentCulture.Name);
+
+			_calendar = CreateCalendar (calendar);
+			_is24HourClock = (clock == "24HourClock");
+			_timeZone = TimeZoneInfo.FindSystemTimeZoneById (timeZoneId);
+			_utcDateTime = DateTime.UtcNow;
+			UpdateLocalDateTime ();
+		}
+
+		public int Day
+		{
+			get
+			{
+				return _calendar.GetDayOfMonth (_localDateTime);
+			}
+			set
+			{
+				int currentDay = _calendar.GetDayOfMonth (_localDateTime);
+				if (value == currentDay) return;
+				// 通过加减天数来设置日期
+				DateTime newLocal = _calendar.AddDays (_localDateTime, value - currentDay);
+				_localDateTime = newLocal;
+				UpdateUtcDateTime ();
+			}
+		}
+
+		public int DayOfWeek
+		{
+			get
+			{
+				// 返回 0-6，0 表示星期日
+				return (int)_calendar.GetDayOfWeek (_localDateTime);
+			}
+		}
+
+		public int Era
+		{
+			get
+			{
+				return _calendar.GetEra (_localDateTime);
+			}
+			set
+			{
+				// 更改纪元较复杂，简化：仅当值不同时不做任何操作（可根据需求实现）
+				// 这里忽略设置，或者可以抛出 NotSupportedException
+				if (value != Era)
+					throw new NotSupportedException ("Setting Era directly is not supported in this implementation.");
+			}
+		}
+
+		public int FirstDayInThisMonth
+		{
+			get { return 1; }
+		}
+
+		public int FirstEra
+		{
+			get { return _calendar.GetEra (_calendar.MinSupportedDateTime); }
+		}
+
+		public int FirstHourInThisPeriod
+		{
+			get
+			{
+				if (_is24HourClock)
+					return 0;
+				else
+					return (Period == 0) ? 1 : 13;
+			}
+		}
+
+		public int FirstMinuteInThisHour
+		{
+			get { return 0; }
+		}
+
+		public int FirstMonthInThisYear
+		{
+			get { return 1; }
+		}
+
+		public int FirstPeriodInThisDay
+		{
+			get { return 0; } // 0 = AM
+		}
+
+		public int FirstSecondInThisMinute
+		{
+			get { return 0; }
+		}
+
+		public int FirstYearInThisEra
+		{
+			get
+			{
+				DateTime eraStart = _calendar.MinSupportedDateTime;
+				int targetEra = Era;
+				while (_calendar.GetEra (eraStart) != targetEra && eraStart < DateTime.MaxValue)
+				{
+					eraStart = _calendar.AddYears (eraStart, 1);
+				}
+				return _calendar.GetYear (eraStart);
+			}
+		}
+
+		public int Hour
+		{
+			get
+			{
+				int hour24 = _calendar.GetHour (_localDateTime);
+				if (_is24HourClock)
+					return hour24;
+				int hour12 = hour24 % 12;
+				return (hour12 == 0) ? 12 : hour12;
+			}
+			set
+			{
+				if (_is24HourClock)
+				{
+					if (value < 0 || value > 23)
+						throw new ArgumentOutOfRangeException (nameof (value), "Hour must be between 0 and 23 for 24-hour clock.");
+					DateTime newLocal = _localDateTime.Date.AddHours (value).AddMinutes (Minute).AddSeconds (Second);
+					_localDateTime = newLocal;
+				}
+				else
+				{
+					if (value < 1 || value > 12)
+						throw new ArgumentOutOfRangeException (nameof (value), "Hour must be between 1 and 12 for 12-hour clock.");
+					int hour24 = value % 12;
+					if (Period == 1) hour24 += 12;
+					DateTime newLocal = _localDateTime.Date.AddHours (hour24).AddMinutes (Minute).AddSeconds (Second);
+					_localDateTime = newLocal;
+				}
+				UpdateUtcDateTime ();
+			}
+		}
+
+		public bool IsDaylightSavingTime
+		{
+			get { return _timeZone.IsDaylightSavingTime (_localDateTime); }
+		}
+
+		public _I_List Languages
+		{
+			get { return new _I_List (_languages.AsReadOnly ().Select (e => (object)e), true) ; }
+		}
+
+		public int LastDayInThisMonth
+		{
+			get { return _calendar.GetDaysInMonth (_calendar.GetYear (_localDateTime), _calendar.GetMonth (_localDateTime)); }
+		}
+
+		public int LastEra
+		{
+			get { return _calendar.GetEra (_calendar.MaxSupportedDateTime); }
+		}
+
+		public int LastHourInThisPeriod
+		{
+			get
+			{
+				if (_is24HourClock)
+					return 23;
+				else
+					return (Period == 0) ? 11 : 23;
+			}
+		}
+
+		public int LastMinuteInThisHour
+		{
+			get { return 59; }
+		}
+
+		public int LastMonthInThisYear
+		{
+			get { return _calendar.GetMonthsInYear (_calendar.GetYear (_localDateTime)); }
+		}
+
+		public int LastPeriodInThisDay
+		{
+			get { return 1; } // 1 = PM
+		}
+
+		public int LastSecondInThisMinute
+		{
+			get { return 59; }
+		}
+
+		public int LastYearInThisEra
+		{
+			get
+			{
+				DateTime eraEnd = _calendar.MaxSupportedDateTime;
+				int targetEra = Era;
+				while (_calendar.GetEra (eraEnd) != targetEra && eraEnd > DateTime.MinValue)
+				{
+					eraEnd = _calendar.AddYears (eraEnd, -1);
+				}
+				return _calendar.GetYear (eraEnd);
+			}
+		}
+
+		public int Minute
+		{
+			get { return _calendar.GetMinute (_localDateTime); }
+			set
+			{
+				if (value < 0 || value > 59)
+					throw new ArgumentOutOfRangeException (nameof (value), "Minute must be between 0 and 59.");
+				DateTime newLocal = _localDateTime.AddMinutes (value - _calendar.GetMinute (_localDateTime));
+				_localDateTime = newLocal;
+				UpdateUtcDateTime ();
+			}
+		}
+
+		public int Month
+		{
+			get { return _calendar.GetMonth (_localDateTime); }
+			set
+			{
+				if (value < 1 || value > _calendar.GetMonthsInYear (_calendar.GetYear (_localDateTime)))
+					throw new ArgumentOutOfRangeException (nameof (value), "Month is out of range for current year.");
+				DateTime newLocal = SetCalendarField (_localDateTime, (cal, dt, val) => cal.AddMonths (dt, val - cal.GetMonth (dt)), value);
+				_localDateTime = newLocal;
+				UpdateUtcDateTime ();
+			}
+		}
+
+		public int Nanosecond
+		{
+			get
+			{
+				long ticksInSecond = _localDateTime.Ticks % TimeSpan.TicksPerSecond;
+				return (int)(ticksInSecond * 100); // 1 tick = 100 ns
+			}
+			set
+			{
+				if (value < 0 || value > 999999999)
+					throw new ArgumentOutOfRangeException (nameof (value), "Nanosecond must be between 0 and 999,999,999.");
+				long ticks = (_localDateTime.Ticks / TimeSpan.TicksPerSecond) * TimeSpan.TicksPerSecond + (value / 100);
+				_localDateTime = new DateTime (ticks, _localDateTime.Kind);
+				UpdateUtcDateTime ();
+			}
+		}
+
+		public int NumberOfDaysInThisMonth
+		{
+			get { return LastDayInThisMonth; }
+		}
+
+		public int NumberOfEras
+		{
+			get { return _calendar.Eras.Length; }
+		}
+
+		public int NumberOfHoursInThisPeriod
+		{
+			get { return _is24HourClock ? 24 : 12; }
+		}
+
+		public int NumberOfMinutesInThisHour
+		{
+			get { return 60; }
+		}
+
+		public int NumberOfMonthsInThisYear
+		{
+			get { return _calendar.GetMonthsInYear (_calendar.GetYear (_localDateTime)); }
+		}
+
+		public int NumberOfPeriodsInThisDay
+		{
+			get { return 2; }
+		}
+
+		public int NumberOfSecondsInThisMinute
+		{
+			get { return 60; }
+		}
+
+		public int NumberOfYearsInThisEra
+		{
+			get { return LastYearInThisEra - FirstYearInThisEra + 1; }
+		}
+
+		public string NumeralSystem
+		{
+			get { return _numeralSystem; }
+			set { _numeralSystem = value; }   // 简化：未实现实际数字转换
+		}
+
+		public int Period
+		{
+			get
+			{
+				int hour24 = _calendar.GetHour (_localDateTime);
+				return (hour24 >= 12) ? 1 : 0;
+			}
+			set
+			{
+				if (value != 0 && value != 1)
+					throw new ArgumentOutOfRangeException (nameof (value), "Period must be 0 (AM) or 1 (PM).");
+				int currentPeriod = Period;
+				if (currentPeriod == value) return;
+				// 切换 AM/PM：加减 12 小时
+				DateTime newLocal = _localDateTime.AddHours (value == 0 ? -12 : 12);
+				_localDateTime = newLocal;
+				UpdateUtcDateTime ();
+			}
+		}
+
+		public string ResolvedLanguage
+		{
+			get
+			{
+				if (_languages != null && _languages.Count > 0)
+					return _languages [0];
+				return CultureInfo.CurrentCulture.Name;
+			}
+		}
+
+		public int Second
+		{
+			get { return _calendar.GetSecond (_localDateTime); }
+			set
+			{
+				if (value < 0 || value > 59)
+					throw new ArgumentOutOfRangeException (nameof (value), "Second must be between 0 and 59.");
+				DateTime newLocal = _localDateTime.AddSeconds (value - _calendar.GetSecond (_localDateTime));
+				_localDateTime = newLocal;
+				UpdateUtcDateTime ();
+			}
+		}
+
+		public int Year
+		{
+			get { return _calendar.GetYear (_localDateTime); }
+			set
+			{
+				if (value < _calendar.GetYear (_calendar.MinSupportedDateTime) || value > _calendar.GetYear (_calendar.MaxSupportedDateTime))
+					throw new ArgumentOutOfRangeException (nameof (value), "Year is out of range for this calendar.");
+				DateTime newLocal = SetCalendarField (_localDateTime, (cal, dt, val) => cal.AddYears (dt, val - cal.GetYear (dt)), value);
+				_localDateTime = newLocal;
+				UpdateUtcDateTime ();
+			}
+		}
+
+		public void AddDays (int days)
+		{
+			_localDateTime = _calendar.AddDays (_localDateTime, days);
+			UpdateUtcDateTime ();
+		}
+
+		public void AddEras (int eras)
+		{
+			// 简化：每个纪元按 1000 年估算（实际应基于日历的纪元范围）
+			// 大多数情况下不应频繁使用此方法
+			_localDateTime = _calendar.AddYears (_localDateTime, eras * 1000);
+			UpdateUtcDateTime ();
+		}
+
+		public void AddHours (int hours)
+		{
+			_localDateTime = _localDateTime.AddHours (hours);
+			UpdateUtcDateTime ();
+		}
+
+		public void AddMinutes (int minutes)
+		{
+			_localDateTime = _localDateTime.AddMinutes (minutes);
+			UpdateUtcDateTime ();
+		}
+
+		public void AddMonths (int months)
+		{
+			_localDateTime = _calendar.AddMonths (_localDateTime, months);
+			UpdateUtcDateTime ();
+		}
+
+		public void AddNanoseconds (int nanoseconds)
+		{
+			long ticksToAdd = nanoseconds / 100;
+			_localDateTime = _localDateTime.AddTicks (ticksToAdd);
+			UpdateUtcDateTime ();
+		}
+
+		public void AddPeriods (int periods)
+		{
+			_localDateTime = _localDateTime.AddHours (periods * 12);
+			UpdateUtcDateTime ();
+		}
+
+		public void AddSeconds (int seconds)
+		{
+			_localDateTime = _localDateTime.AddSeconds (seconds);
+			UpdateUtcDateTime ();
+		}
+
+		public void AddWeeks (int weeks)
+		{
+			AddDays (weeks * 7);
+		}
+
+		public void AddYears (int years)
+		{
+			_localDateTime = _calendar.AddYears (_localDateTime, years);
+			UpdateUtcDateTime ();
+		}
+
+		public void ChangeCalendarSystem (string calendarId)
+		{
+			Calendar newCalendar = CreateCalendar (calendarId);
+			// 注意：日历改变不会改变绝对时间，但会影响组件（年、月、日等）
+			// 只需替换日历实例，_localDateTime 保持不变（但解释方式变了）
+			_calendar = newCalendar;
+		}
+
+		public void ChangeClock (string clock)
+		{
+			_is24HourClock = (clock == "24HourClock");
+		}
+
+		public void ChangeTimeZone (string timeZoneId)
+		{
+			_timeZone = TimeZoneInfo.FindSystemTimeZoneById (timeZoneId);
+			UpdateLocalDateTime ();   // 重新计算本地时间（UTC 不变）
+		}
+
+		public _I_Calendar Clone ()
+		{
+			var clone = new _I_Calendar (_languages, GetCalendarSystem (), GetClock (), GetTimeZone ());
+			clone.SetDateTime (GetDateTime ());
+			return clone;
+		}
+
+		public int Compare (_I_Calendar other)
+		{
+			if (other == null) return 1;
+			return DateTime.Compare (this.GetDateTime (), other.GetDateTime ());
+		}
+
+		public static DateTime JsDateToDateTime (object jsDate)
+		{
+			if (jsDate == null)
+				throw new ArgumentNullException (nameof (jsDate));
+			Type type = jsDate.GetType ();
+			double milliseconds = (double)type.InvokeMember (
+				"getTime",
+				BindingFlags.InvokeMethod,
+				null,
+				jsDate,
+				null);
+			DateTimeOffset epoch = new DateTimeOffset (1970, 1, 1, 0, 0, 0, TimeSpan.Zero);
+			DateTimeOffset dateTimeOffset = epoch.AddMilliseconds (milliseconds);
+			return dateTimeOffset.UtcDateTime;
+		}
+		public int CompareDateTime (object other)
+		{
+			return DateTime.Compare (this.GetDateTime (), JsDateToDateTime (other));
+		}
+
+		public void CopyTo (_I_Calendar other)
+		{
+			if (other == null) throw new ArgumentNullException (nameof (other));
+			other._utcDateTime = this._utcDateTime;
+			other._localDateTime = this._localDateTime;
+			other._calendar = this._calendar;
+			other._timeZone = this._timeZone;
+			other._is24HourClock = this._is24HourClock;
+			other._languages = new List<string> (this._languages);
+			other._numeralSystem = this._numeralSystem;
+		}
+
+		public string DayAsPaddedString (int minDigits)
+		{
+			return Day.ToString ().PadLeft (minDigits, '0');
+		}
+
+		public string DayAsString ()
+		{
+			return Day.ToString ();
+		}
+
+		public string DayOfWeekAsSoloString ()
+		{
+			return DayOfWeekAsString ();
+		}
+
+		public string DayOfWeekAsSoloString (int idealLength)
+		{
+			// 简化：忽略 idealLength
+			return DayOfWeekAsString ();
+		}
+
+		public string DayOfWeekAsString ()
+		{
+			return _localDateTime.ToString ("dddd", GetFormatCulture ());
+		}
+
+		public string DayOfWeekAsString (int idealLength)
+		{
+			return DayOfWeekAsString ();
+		}
+
+		public string EraAsString ()
+		{
+			// 简化：返回纪元索引的字符串
+			return Era.ToString ();
+		}
+
+		public string EraAsString (int idealLength)
+		{
+			return EraAsString ();
+		}
+
+		public string GetCalendarSystem ()
+		{
+			if (_calendar is GregorianCalendar) return "GregorianCalendar";
+			if (_calendar is HebrewCalendar) return "HebrewCalendar";
+			if (_calendar is HijriCalendar) return "HijriCalendar";
+			if (_calendar is JapaneseCalendar) return "JapaneseCalendar";
+			if (_calendar is KoreanCalendar) return "KoreanCalendar";
+			if (_calendar is TaiwanCalendar) return "TaiwanCalendar";
+			if (_calendar is ThaiBuddhistCalendar) return "ThaiBuddhistCalendar";
+			if (_calendar is UmAlQuraCalendar) return "UmAlQuraCalendar";
+			return "GregorianCalendar";
+		}
+
+		public string GetClock ()
+		{
+			return _is24HourClock ? "24HourClock" : "12HourClock";
+		}
+
+		public DateTime GetDateTime ()
+		{
+			// 返回 UTC 时间
+			return _utcDateTime;
+		}
+
+		public string GetTimeZone ()
+		{
+			return _timeZone.Id;
+		}
+
+		public string HourAsPaddedString (int minDigits)
+		{
+			return Hour.ToString ().PadLeft (minDigits, '0');
+		}
+
+		public string HourAsString ()
+		{
+			return Hour.ToString ();
+		}
+
+		public string MinuteAsPaddedString (int minDigits)
+		{
+			return Minute.ToString ().PadLeft (minDigits, '0');
+		}
+
+		public string MinuteAsString ()
+		{
+			return Minute.ToString ();
+		}
+
+		public string MonthAsNumericString ()
+		{
+			return Month.ToString ();
+		}
+
+		public string MonthAsPaddedNumericString (int minDigits)
+		{
+			return Month.ToString ().PadLeft (minDigits, '0');
+		}
+
+		public string MonthAsSoloString ()
+		{
+			return _localDateTime.ToString ("MMMM", GetFormatCulture ());
+		}
+
+		public string MonthAsSoloString (int idealLength)
+		{
+			return MonthAsSoloString ();
+		}
+
+		public string MonthAsString ()
+		{
+			return _localDateTime.ToString ("MMM", GetFormatCulture ());
+		}
+
+		public string MonthAsString (int idealLength)
+		{
+			return MonthAsString ();
+		}
+
+		public string NanosecondAsPaddedString (int minDigits)
+		{
+			return Nanosecond.ToString ().PadLeft (minDigits, '0');
+		}
+
+		public string NanosecondAsString ()
+		{
+			return Nanosecond.ToString ();
+		}
+
+		public string PeriodAsString ()
+		{
+			return PeriodAsString (0);
+		}
+
+		public string PeriodAsString (int idealLength)
+		{
+			return _localDateTime.ToString ("tt", GetFormatCulture ());
+		}
+
+		public string SecondAsPaddedString (int minDigits)
+		{
+			return Second.ToString ().PadLeft (minDigits, '0');
+		}
+
+		public string SecondAsString ()
+		{
+			return Second.ToString ();
+		}
+
+		public void SetDateTime (DateTime value)
+		{
+			_utcDateTime = value.ToUniversalTime ();
+			UpdateLocalDateTime ();
+		}
+
+		public void SetToMax ()
+		{
+			SetDateTime (DateTime.MaxValue);
+		}
+
+		public void SetToMin ()
+		{
+			SetDateTime (DateTime.MinValue);
+		}
+
+		public void SetToNow ()
+		{
+			SetDateTime (DateTime.UtcNow);
+		}
+
+		public string TimeZoneAsString ()
+		{
+			return TimeZoneAsString (0);
+		}
+
+		public string TimeZoneAsString (int idealLength)
+		{
+			// 简化：返回标准显示名称
+			return _timeZone.DisplayName;
+		}
+
+		public string YearAsPaddedString (int minDigits)
+		{
+			return Year.ToString ().PadLeft (minDigits, '0');
+		}
+
+		public string YearAsString ()
+		{
+			return Year.ToString ();
+		}
+
+		public string YearAsTruncatedString (int remainingDigits)
+		{
+			string yearStr = Year.ToString ();
+			if (yearStr.Length <= remainingDigits)
+				return yearStr;
+			return yearStr.Substring (yearStr.Length - remainingDigits);
+		}
+	}
+}

DataUtils/DataUtils.csproj

@@ -45,6 +45,8 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="Calendar.cs" />
+    <Compile Include="DateTimeFormat.cs" />
     <Compile Include="Download.cs" />
     <Compile Include="Enumerable.cs" />
     <Compile Include="HResult.cs" />

DataUtils/DateTimeFormat.cs

@@ -0,0 +1,494 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Reflection;
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace DataUtils
+{
+	public enum YearFormat
+	{
+		None = 0,
+		Default = 1,
+		Abbreviated = 2,
+		Full = 3,
+	}
+
+	public enum MonthFormat
+	{
+		None = 0,
+		Default = 1,
+		Abbreviated = 2,
+		Full = 3,
+		Numeric = 4,
+	}
+
+	public enum DayFormat
+	{
+		None = 0,
+		Default = 1,
+	}
+
+	public enum DayOfWeekFormat
+	{
+		None = 0,
+		Default = 1,
+		Abbreviated = 2,
+		Full = 3,
+	}
+
+	public enum HourFormat
+	{
+		None = 0,
+		Default = 1,
+	}
+
+	public enum MinuteFormat
+	{
+		None = 0,
+		Default = 1,
+	}
+
+	public enum SecondFormat
+	{
+		None = 0,
+		Default = 1,
+	}
+
+	[ComVisible (true)]
+	[ClassInterface (ClassInterfaceType.AutoDual)]
+	public class _I_DateTimeFormatter
+	{
+		// ---------- 私有字段 ----------
+		private string _formatTemplate;           // 原始模板字符串
+		private string _formatPattern;            // 实际用于 .NET 格式化的模式
+		private List<string> _languages;          // 语言优先级列表
+		private string _geographicRegion;         // 地理区域
+		private string _calendar = "GregorianCalendar";
+		private string _clock = "24HourClock";
+		private string _numeralSystem = "Latn";
+		private CultureInfo _culture;              // 解析后的 CultureInfo
+		private string _resolvedLanguage;          // 实际使用的语言
+		private string _resolvedGeographicRegion;  // 实际使用的区域
+
+		// 存储构造时传入的枚举值（用于 IncludeXXX 属性）
+		private YearFormat _yearFormat = YearFormat.None;
+		private MonthFormat _monthFormat = MonthFormat.None;
+		private DayFormat _dayFormat = DayFormat.None;
+		private DayOfWeekFormat _dayOfWeekFormat = DayOfWeekFormat.None;
+		private HourFormat _hourFormat = HourFormat.None;
+		private MinuteFormat _minuteFormat = MinuteFormat.None;
+		private SecondFormat _secondFormat = SecondFormat.None;
+
+		// ---------- 辅助方法 ----------
+		private static string MapTemplateToPattern (string template, CultureInfo culture, string clock)
+		{
+			if (string.IsNullOrEmpty (template))
+				return string.Empty;
+
+			switch (template.ToLowerInvariant ())
+			{
+				case "longdate":
+					return culture.DateTimeFormat.LongDatePattern;
+				case "shortdate":
+					return culture.DateTimeFormat.ShortDatePattern;
+				case "longtime":
+					return culture.DateTimeFormat.LongTimePattern;
+				case "shorttime":
+					return culture.DateTimeFormat.ShortTimePattern;
+				case "dayofweek":
+					return culture.DateTimeFormat.ShortestDayNames? [0] ?? "dddd"; // 近似
+				case "dayofweek.full":
+					return "dddd";
+				case "dayofweek.abbreviated":
+					return "ddd";
+				case "day":
+					return "dd";
+				case "month":
+					return "MMMM";
+				case "month.full":
+					return "MMMM";
+				case "month.abbreviated":
+					return "MMM";
+				case "month.numeric":
+					return "MM";
+				case "year":
+					return "yyyy";
+				case "year.full":
+					return "yyyy";
+				case "year.abbreviated":
+					return "yy";
+				case "hour":
+					return clock == "24HourClock" ? "HH" : "hh";
+				case "minute":
+					return "mm";
+				case "second":
+					return "ss";
+				case "timezone":
+					return "zzz";
+				default:
+					// 如果不是预定义模板，则当作自定义模式直接返回
+					return template;
+			}
+		}
+
+		// 根据枚举组合构建格式模式
+		private static string BuildPatternFromEnums (YearFormat year, MonthFormat month, DayFormat day, DayOfWeekFormat dayOfWeek,
+													 HourFormat hour, MinuteFormat minute, SecondFormat second,
+													 string clock, CultureInfo culture)
+		{
+			var parts = new List<string> ();
+			// 日期部分
+			if (dayOfWeek != DayOfWeekFormat.None)
+			{
+				if (dayOfWeek == DayOfWeekFormat.Abbreviated)
+					parts.Add ("ddd");
+				else // Full or Default
+					parts.Add ("dddd");
+			}
+			if (year != YearFormat.None)
+			{
+				if (year == YearFormat.Abbreviated)
+					parts.Add ("yy");
+				else
+					parts.Add ("yyyy");
+			}
+			if (month != MonthFormat.None)
+			{
+				switch (month)
+				{
+					case MonthFormat.Numeric:
+						parts.Add ("MM");
+						break;
+					case MonthFormat.Abbreviated:
+						parts.Add ("MMM");
+						break;
+					case MonthFormat.Full:
+						parts.Add ("MMMM");
+						break;
+					default:
+						parts.Add ("MM");
+						break;
+				}
+			}
+			if (day != DayFormat.None)
+			{
+				parts.Add ("dd");
+			}
+			string datePart = string.Join (" ", parts);
+			// 时间部分
+			var timeParts = new List<string> ();
+			if (hour != HourFormat.None)
+			{
+				if (clock == "24HourClock")
+					timeParts.Add ("HH");
+				else
+					timeParts.Add ("hh");
+			}
+			if (minute != MinuteFormat.None)
+			{
+				timeParts.Add ("mm");
+			}
+			if (second != SecondFormat.None)
+			{
+				timeParts.Add ("ss");
+			}
+			string timePart = timeParts.Count > 0 ? string.Join (":", timeParts) : "";
+			if (!string.IsNullOrEmpty (datePart) && !string.IsNullOrEmpty (timePart))
+				return datePart + " " + timePart;
+			if (!string.IsNullOrEmpty (datePart))
+				return datePart;
+			return timePart;
+		}
+
+		// 将 JS Date 对象转换为 DateTime
+		private DateTime ConvertJsDateToDateTime (object jsDate)
+		{
+			if (jsDate == null)
+				throw new ArgumentNullException (nameof (jsDate));
+
+			Type type = jsDate.GetType ();
+			// 调用 getTime() 获取毫秒数 (double)
+			double milliseconds = (double)type.InvokeMember (
+				"getTime",
+				BindingFlags.InvokeMethod,
+				null,
+				jsDate,
+				null);
+
+			// 手动计算 Unix 纪元转换（兼容低版本 .NET）
+			DateTime epoch = new DateTime (1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
+			DateTime utcDateTime = epoch.AddMilliseconds (milliseconds);
+			// 返回本地时间（可根据需求调整）
+			return utcDateTime.ToLocalTime ();
+		}
+
+		// 初始化文化信息
+		private void InitializeCulture ()
+		{
+			string lang = (_languages != null && _languages.Count > 0) ? _languages [0] : CultureInfo.CurrentCulture.Name;
+			try
+			{
+				_culture = new CultureInfo (lang);
+				_resolvedLanguage = _culture.Name;
+			}
+			catch
+			{
+				_culture = CultureInfo.CurrentCulture;
+				_resolvedLanguage = _culture.Name;
+			}
+			_resolvedGeographicRegion = _geographicRegion ?? _culture.Name;
+			// 根据区域和语言更新格式模式（如果使用模板）
+			if (!string.IsNullOrEmpty (_formatTemplate))
+			{
+				_formatPattern = MapTemplateToPattern (_formatTemplate, _culture, _clock);
+			}
+			else if (_yearFormat != YearFormat.None || _monthFormat != MonthFormat.None ||
+					 _dayFormat != DayFormat.None || _dayOfWeekFormat != DayOfWeekFormat.None ||
+					 _hourFormat != HourFormat.None || _minuteFormat != MinuteFormat.None ||
+					 _secondFormat != SecondFormat.None)
+			{
+				_formatPattern = BuildPatternFromEnums (_yearFormat, _monthFormat, _dayFormat, _dayOfWeekFormat,
+													   _hourFormat, _minuteFormat, _secondFormat, _clock, _culture);
+			}
+		}
+
+		// ---------- 构造函数 ----------
+		public _I_DateTimeFormatter (string formatTemplate)
+			: this (formatTemplate, null, null, null, null)
+		{
+		}
+
+		public _I_DateTimeFormatter (string formatTemplate, IEnumerable<string> languages)
+			: this (formatTemplate, languages, null, null, null)
+		{
+		}
+
+		public _I_DateTimeFormatter (string formatTemplate, IEnumerable<string> languages, string geographicRegion, string calendar, string clock)
+		{
+			_formatTemplate = formatTemplate;
+			_languages = languages == null ? new List<string> () : new List<string> (languages);
+			_geographicRegion = geographicRegion;
+			if (!string.IsNullOrEmpty (calendar))
+				_calendar = calendar;
+			if (!string.IsNullOrEmpty (clock))
+				_clock = clock;
+			InitializeCulture ();
+		}
+
+		public _I_DateTimeFormatter (YearFormat year, MonthFormat month, DayFormat day, DayOfWeekFormat dayOfWeek)
+			: this (year, month, day, dayOfWeek, HourFormat.None, MinuteFormat.None, SecondFormat.None, null, null, null, null)
+		{
+		}
+
+		public _I_DateTimeFormatter (HourFormat hour, MinuteFormat minute, SecondFormat second)
+			: this (YearFormat.None, MonthFormat.None, DayFormat.None, DayOfWeekFormat.None, hour, minute, second, null, null, null, null)
+		{
+		}
+
+		public _I_DateTimeFormatter (YearFormat year, MonthFormat month, DayFormat day, DayOfWeekFormat dayOfWeek,
+									HourFormat hour, MinuteFormat minute, SecondFormat second,
+									IEnumerable<string> languages)
+			: this (year, month, day, dayOfWeek, hour, minute, second, languages, null, null, null)
+		{
+		}
+
+		public _I_DateTimeFormatter (YearFormat year, MonthFormat month, DayFormat day, DayOfWeekFormat dayOfWeek,
+									HourFormat hour, MinuteFormat minute, SecondFormat second,
+									IEnumerable<string> languages, string geographicRegion, string calendar, string clock)
+		{
+			_yearFormat = year;
+			_monthFormat = month;
+			_dayFormat = day;
+			_dayOfWeekFormat = dayOfWeek;
+			_hourFormat = hour;
+			_minuteFormat = minute;
+			_secondFormat = second;
+			_languages = languages == null ? new List<string> () : new List<string> (languages);
+			_geographicRegion = geographicRegion;
+			if (!string.IsNullOrEmpty (calendar))
+				_calendar = calendar;
+			if (!string.IsNullOrEmpty (clock))
+				_clock = clock;
+			InitializeCulture ();
+		}
+
+		// ---------- 属性 ----------
+		public string Calendar
+		{
+			get { return _calendar; }
+			set
+			{
+				_calendar = value;
+				// 日历更改可能需要重新初始化模式，这里简化处理
+			}
+		}
+
+		public string Clock
+		{
+			get { return _clock; }
+			set
+			{
+				_clock = value;
+				InitializeCulture (); // 重新生成模式（因为小时格式可能变化）
+			}
+		}
+
+		public string GeographicRegion
+		{
+			get { return _geographicRegion; }
+			set
+			{
+				_geographicRegion = value;
+				InitializeCulture ();
+			}
+		}
+
+		public int IncludeDay
+		{
+			get { return (int)_dayFormat; }
+		}
+
+		public int IncludeDayOfWeek
+		{
+			get { return (int)_dayOfWeekFormat; }
+		}
+
+		public int IncludeHour
+		{
+			get { return (int)_hourFormat; }
+		}
+
+		public int IncludeMinute
+		{
+			get { return (int)_minuteFormat; }
+		}
+
+		public int IncludeMonth
+		{
+			get { return (int)_monthFormat; }
+		}
+
+		public int IncludeSecond
+		{
+			get { return (int)_secondFormat; }
+		}
+
+		public int IncludeYear
+		{
+			get { return (int)_yearFormat; }
+		}
+
+		public _I_List Languages
+		{
+			get { return new _I_List (_languages.AsReadOnly ().Select (e => (object)e), true); }
+		}
+
+		public static _I_DateTimeFormatter LongDate
+		{
+			get
+			{
+				return new _I_DateTimeFormatter ("longdate");
+			}
+		}
+
+		public static _I_DateTimeFormatter LongTime
+		{
+			get
+			{
+				return new _I_DateTimeFormatter ("longtime");
+			}
+		}
+
+		public string NumeralSystem
+		{
+			get { return _numeralSystem; }
+			set { _numeralSystem = value; }
+		}
+
+		public _I_List Patterns
+		{
+			get
+			{
+				return new _I_List (new List<string> { _formatPattern }.AsReadOnly ().Select (e => (object)e), true);
+			}
+		}
+
+		public string ResolvedGeographicRegion
+		{
+			get { return _resolvedGeographicRegion; }
+		}
+
+		public string ResolvedLanguage
+		{
+			get { return _resolvedLanguage; }
+		}
+
+		public static _I_DateTimeFormatter ShortDate
+		{
+			get
+			{
+				return new _I_DateTimeFormatter ("shortdate");
+			}
+		}
+
+		public static _I_DateTimeFormatter ShortTime
+		{
+			get
+			{
+				return new _I_DateTimeFormatter ("shorttime");
+			}
+		}
+
+		public string Template
+		{
+			get
+			{
+				if (!string.IsNullOrEmpty (_formatTemplate))
+					return _formatTemplate;
+				// 从枚举组合生成模板描述（简化）
+				return _formatPattern;
+			}
+		}
+
+		// ---------- 方法 ----------
+		public string FormatC (DateTime dateTime)
+		{
+			return dateTime.ToString (_formatPattern, _culture);
+		}
+
+		public string FormatC (DateTime dateTime, string timeZoneId)
+		{
+			if (!string.IsNullOrEmpty (timeZoneId))
+			{
+				try
+				{
+					TimeZoneInfo tzi = TimeZoneInfo.FindSystemTimeZoneById (timeZoneId);
+					DateTime targetTime = TimeZoneInfo.ConvertTime (dateTime, tzi);
+					return targetTime.ToString (_formatPattern, _culture);
+				}
+				catch
+				{
+					// 时区无效，回退到原始时间
+					return dateTime.ToString (_formatPattern, _culture);
+				}
+			}
+			return dateTime.ToString (_formatPattern, _culture);
+		}
+
+		// 为方便 JS 调用，提供接受 object 的重载（自动识别 JS Date）
+		public string Format (object jsDate)
+		{
+			DateTime dt = ConvertJsDateToDateTime (jsDate);
+			return FormatC (dt);
+		}
+
+		public string FormatWithTimeZone (object jsDate, string timeZoneId)
+		{
+			DateTime dt = ConvertJsDateToDateTime (jsDate);
+			return FormatC (dt, timeZoneId);
+		}
+	}
+}

DataUtils/Enumerable.cs

@@ -10,7 +10,7 @@ namespace DataUtils
 {
 	[ComVisible (true)]
 	[InterfaceType (ComInterfaceType.InterfaceIsDual)]
-	public interface _I_Enumerable
+	public interface _I_Enumerable: IDisposable
 	{
 		int Length { get; set; }
 		object this [int index] { get; set; }
@@ -33,6 +33,9 @@ namespace DataUtils
 		int IndexOfKey (int key);             // 按内部 key 查找
 		void Move (int index, int newIndex);  // 移动元素
 		void PushAll (object [] items);        // 一次性 push 多个
+		object Get (int index);
+		object Set (int index, object value);
+		object At (int index);
 	}
 	public class _I_List: _I_Enumerable, IList
 	{
@@ -43,6 +46,9 @@ namespace DataUtils
 			IsReadOnly = readOnly;
 			IsSynchronized = sync;
 		}
+		public _I_List (bool readOnly = false, bool fixedSize = false, bool sync = true) :
+			this (null, readOnly, fixedSize, sync)
+		{ }
 		protected List<object> _list;
 		protected object _lock = new object ();
 		public object this [int index] { get { return _list [index]; } set { _list [index] = value; } }
@@ -155,5 +161,13 @@ namespace DataUtils
 			return first;
 		}
 		public void Unshift (object value) => _list.Insert (0, value);
+		public void Dispose ()
+		{
+			_list?.Clear ();
+			_list = null;
+		}
+		public object Get (int index) => this [index];
+		public object Set (int index, object value) => this [index] = value;
+		public object At (int index) => this [index];
 	}
 }

DataUtils/Locale.cs

@@ -1,29 +1,116 @@
 using System;
+using System.Collections.Generic;
 using System.Globalization;
+using System.Linq;
 using System.Runtime.InteropServices;
 using System.Text;
+using System.Text.RegularExpressions;
 
 namespace DataUtils
 {
 	internal static class NativeMethods
 	{
+		public const int LOCALE_SSHORTESTSCRIPT = 0x0000004F; // 获取四字母脚本代码
+		public const uint KLF_ACTIVATE = 0x00000001; // 激活键盘布局
 		// GetLocaleInfoW for LCID-based queries
 		[DllImport ("kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
 		public static extern int GetLocaleInfoW (int Locale, int LCType, [Out] StringBuilder lpLCData, int cchData);
-
 		// GetLocaleInfoEx for locale name based queries
 		[DllImport ("kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
 		public static extern int GetLocaleInfoEx (string lpLocaleName, int LCType, [Out] StringBuilder lpLCData, int cchData);
-
 		// LocaleNameToLCID - available on Vista+; fallback is to use CultureInfo
 		[DllImport ("kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
 		public static extern int LocaleNameToLCID (string lpName, uint dwFlags);
-
 		// LCIDToLocaleName (Vista+)
 		[DllImport ("kernel32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
 		public static extern int LCIDToLocaleName (int Locale, [Out] StringBuilder lpName, int cchName, uint dwFlags);
+		[DllImport ("user32.dll")]
+		public static extern IntPtr GetKeyboardLayout (uint dwLayout);
+		[DllImport ("user32.dll", CharSet = CharSet.Auto)]
+		public static extern IntPtr LoadKeyboardLayout (string pwszKLID, uint Flags);
 	}
+	[ComVisible (true)]
+	[ClassInterface (ClassInterfaceType.AutoDual)]
+	public class _I_Language: System.Globalization.CultureInfo
+	{
+		public _I_Language (string localeName) : base (localeName) { }
+		public string AbbreviatedName => this.ThreeLetterISOLanguageName;
+		public string LanguageTag => this.IetfLanguageTag ?? this.Name;
+		public int LayoutDirection
+		{
+			get
+			{
+				if (base.TextInfo.IsRightToLeft) return 1;
+				string tag = this.LanguageTag;
+				bool isVerticalCandidate = false;
+				if (tag != null)
+				{
+					var scriptMatch = Regex.Match (tag, @"-([A-Za-z]{4})(?:-|$)");
+					if (scriptMatch.Success)
+					{
+						string script = scriptMatch.Groups [1].Value;
+						if (script == "Hani" || script == "Hira" || script == "Kana" || script == "Jpan" || script == "Kore" || script == "Hans" || script == "Hant")
+							isVerticalCandidate = true;
+					}
+					if (!isVerticalCandidate)
+					{
+						var regionMatch = Regex.Match (tag, @"-([A-Za-z]{2})$");
+						if (regionMatch.Success)
+						{
+							string region = regionMatch.Groups [1].Value.ToUpperInvariant ();
+							if (region == "JP" || region == "CN" || region == "TW" || region == "HK" || region == "MO" || region == "KR")
+								isVerticalCandidate = true;
+						}
+					}
+				}
+				if (isVerticalCandidate)
+				{
+					return 2;
+				}
+				return 0;
+			}
+		}
+		public string Script
+		{
+			get
+			{
+				StringBuilder sb = new StringBuilder (10);
+				if (NativeMethods.GetLocaleInfoEx (this.Name, NativeMethods.LOCALE_SSHORTESTSCRIPT, sb, sb.Capacity) > 0)
+					return sb.ToString ();
 
+				// 如果失败，尝试从语言标记中解析脚本子标记（如 "zh-Hans-CN" 中的 "Hans"）
+				var match = Regex.Match (this.Name, @"-([A-Za-z]{4})(?:-|$)");
+				if (match.Success)
+					return match.Groups [1].Value;
+
+				return "Unknown";
+			}
+		}
+		public _I_List GetExtensionSubtags (string singleton)
+		{
+			if (string.IsNullOrEmpty (singleton) || singleton.Length != 1)
+				throw new ArgumentException ("Singleton must be a single character", nameof (singleton));
+			var subtags = new List<string> ();
+			string tag = this.LanguageTag;
+			string pattern = $@"-{Regex.Escape (singleton)}-([a-zA-Z0-9](?:-[a-zA-Z0-9]+)*)";
+			var match = Regex.Match (tag, pattern);
+			if (match.Success)
+			{
+				string extPart = match.Groups [1].Value;
+				subtags.AddRange (extPart.Split ('-'));
+			}
+			return new _I_List (subtags.Select (i => (object)i));
+		}
+		public bool TrySetInputMethodLanguageTag (string languageTag)
+		{
+			int lcid = NativeMethods.LocaleNameToLCID (languageTag, 0);
+			if (lcid == 0)
+				return false;
+			string klid = $"{lcid:X8}";
+			IntPtr hkl = NativeMethods.LoadKeyboardLayout (klid, NativeMethods.KLF_ACTIVATE);
+			return hkl != IntPtr.Zero;
+		}
+	}
 	[ComVisible (true)]
 	[ClassInterface (ClassInterfaceType.AutoDual)]
 	public class _I_Locale
@@ -47,7 +134,6 @@ namespace DataUtils
 				}
 			}
 		}
-
 		// Current LCID (int)
 		public int CurrentLCID
 		{
@@ -63,7 +149,6 @@ namespace DataUtils
 				}
 			}
 		}
-
 		// Convert LCID -> locale name (e.g. 1033 -> "en-US")
 		public string ToLocaleName (int lcid)
 		{
@@ -87,7 +172,6 @@ namespace DataUtils
 			}
 			return string.Empty;
 		}
-
 		// Convert locale name -> LCID
 		public int ToLCID (string localeName)
 		{
@@ -111,7 +195,6 @@ namespace DataUtils
 			// fallback: invariant culture
 			return CultureInfo.InvariantCulture.LCID;
 		}
-
 		// Return a locale info string for given LCID and LCTYPE. LCTYPE is the Win32 LOCALE_* constant.
 		// Returns a string (or empty string on failure).
 		public object LocaleInfo (int lcid, int lctype)
@@ -177,7 +260,6 @@ namespace DataUtils
 				return string.Empty;
 			}
 		}
-
 		// LocaleInfoEx: query by locale name string and LCTYPE
 		// Returns string if available; otherwise returns the integer result code (as int) if string empty (mimic C++ behavior).
 		public object LocaleInfoEx (string localeName, int lctype)
@@ -239,7 +321,6 @@ namespace DataUtils
 				return 0;
 			}
 		}
-
 		// Helpers similar to the C++: restricted (language) and elaborated (region) codes
 		public string GetLocaleRestrictedCode (string localeName)
 		{
@@ -257,7 +338,6 @@ namespace DataUtils
 				return string.Empty;
 			}
 		}
-
 		public string GetLocaleElaboratedCode (string localeName)
 		{
 			if (string.IsNullOrEmpty (localeName)) localeName = CurrentLocale;
@@ -284,7 +364,6 @@ namespace DataUtils
 			}
 			return string.Empty;
 		}
-
 		// LCID -> combined code like "en-US" (with configurable separator)
 		public string LcidToLocaleCode (int lcid)
 		{
@@ -304,7 +383,6 @@ namespace DataUtils
 			}
 			return string.Empty;
 		}
-
 		// Get the user default locale name
 		public string GetUserDefaultLocaleName ()
 		{
@@ -317,7 +395,6 @@ namespace DataUtils
 			catch { }
 			return LcidToLocaleCode (CultureInfo.CurrentCulture.LCID);
 		}
-
 		// Get system default locale name (machine)
 		public string GetSystemDefaultLocaleName ()
 		{
@@ -330,7 +407,6 @@ namespace DataUtils
 			catch { }
 			return LcidToLocaleCode (CultureInfo.InstalledUICulture.LCID);
 		}
-
 		// Get computer locale code similar to C++ approach
 		public string GetComputerLocaleCode ()
 		{
@@ -350,7 +426,38 @@ namespace DataUtils
 			// fallback to invariant
 			return CultureInfo.InvariantCulture.Name ?? string.Empty;
 		}
-
+		public _I_List RecommendLocaleNames
+		{
+			get
+			{
+				var arr = new string [] {
+					System.Threading.Thread.CurrentThread.CurrentCulture.Name,
+					GetUserDefaultLocaleName (),
+					GetSystemDefaultLocaleName (),
+					LcidToLocaleCode (CurrentLCID),
+					GetLocaleRestrictedCode (System.Threading.Thread.CurrentThread.CurrentCulture.Name),
+					GetLocaleRestrictedCode (GetUserDefaultLocaleName ()),
+					GetLocaleRestrictedCode (GetSystemDefaultLocaleName ()),
+					"en-US",
+					"en"
+				};
+				var list = new _I_List ();
+				foreach (var loc in arr)
+				{
+					var lloc = loc.Trim ().ToLowerInvariant ();
+					var isfind = false;
+					foreach (var item in list)
+					{
+						var str = item as string;
+						if (string.IsNullOrWhiteSpace (str)) isfind = true;
+						isfind = str.Trim ().ToLowerInvariant () == lloc;
+						if (isfind) break;
+					}
+					if (!isfind) list.Add (loc); 
+				}
+				return list;
+			}
+		}
 		// Compare two locale names; returns true if equal by name or LCID
 		public bool LocaleNameCompare (string left, string right)
 		{
@@ -366,8 +473,62 @@ namespace DataUtils
 				return false;
 			}
 		}
-
 		// Constants
 		private const int LOCALE_NAME_MAX_LENGTH = 85; // defined by Windows
+		public _I_Language CreateLanguage (string localeName) => new _I_Language (localeName);
+		public static string CurrentInputMethodLanguageTag
+		{
+			get
+			{
+				IntPtr hkl = NativeMethods.GetKeyboardLayout (0);
+				int lcid = hkl.ToInt32 () & 0xFFFF;
+
+				StringBuilder sb = new StringBuilder (85);
+				int result = NativeMethods.LCIDToLocaleName (lcid, sb, sb.Capacity, 0);
+				if (result > 0)
+					return sb.ToString ();
+
+				return null;
+			}
+		}
+		public static bool IsWellFormed (string languageTag)
+		{
+			if (string.IsNullOrEmpty (languageTag))
+				return false;
+
+			try
+			{
+				var _ = new CultureInfo (languageTag);
+				return true;
+			}
+			catch
+			{
+				return false;
+			}
+		}
+		public static _I_List GetMuiCompatibleLanguageListFromLanguageTags (IEnumerable<string> languageTags)
+		{
+			var result = new List<string> ();
+			foreach (string tag in languageTags)
+			{
+				if (string.IsNullOrEmpty (tag))
+					continue;
+				result.Add (tag);
+				try
+				{
+					var ci = new CultureInfo (tag);
+					string parent = ci.Parent.Name;
+					if (!string.IsNullOrEmpty (parent) && parent != tag && !result.Contains (parent))
+						result.Add (parent);
+				}
+				catch { }
+				string neutral = Regex.Replace (tag, @"-.*$", "");
+				if (neutral != tag && !result.Contains (neutral))
+					result.Add (neutral);
+			}
+			if (!result.Contains ("neutral"))
+				result.Add ("neutral");
+			return new _I_List (result.Select (t => (object)t));
+		}
 	}
 }

DataUtils/Utils.cs

@@ -1,9 +1,11 @@
 using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Reflection;
 using System.Runtime.InteropServices;
+using System.Runtime.Serialization;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
@@ -382,5 +384,236 @@ namespace DataUtils
 	}
 	[ComVisible (true)]
 	[ClassInterface (ClassInterfaceType.AutoDual)]
-	public class _I_Exception: IExcep
+	public class _I_Exception: Exception, IDisposable
+	{
+		private Exception bex = null;
+		public _I_Exception (Exception ex) { bex = ex; }
+		public _I_Exception (string message) { bex = new Exception (message); }
+		public _I_Exception (string msg, Exception innerEx) { bex = new Exception (msg, innerEx); }
+		public override IDictionary Data => bex.Data;
+		public override Exception GetBaseException () => bex.GetBaseException ();
+		public override void GetObjectData (SerializationInfo info, StreamingContext context) => bex.GetObjectData (info, context);
+		public override string HelpLink
+		{
+			get { return bex.HelpLink; }
+			set { bex.HelpLink = value; }
+		}
+		public override string Message => bex.Message;
+		public override string Source
+		{
+			get { return bex.Source; }
+			set { bex.Source = value; }
+		}
+		public override string StackTrace => bex.StackTrace;
+		public override string ToString () => bex.ToString ();
+		public override int GetHashCode () => bex.GetHashCode ();
+		public override bool Equals (object obj) => bex.Equals (obj);
+		public void Dispose () { bex = null; }
+	}
+	[ComVisible (true)]
+	[ClassInterface (ClassInterfaceType.AutoDual)]
+	public class _I_KeyValuePair: IDisposable
+	{
+		object key = null;
+		object value = null;
+		public _I_KeyValuePair (object k, object v)
+		{
+			key = k;
+			value = v;
+		}
+		public object Key { get { return key; } set { key = value; } }
+		public object Value { get { return value; } set { this.value = value; } }
+		public void Dispose ()
+		{
+			key = null;
+			value = null;
+		}
+		~_I_KeyValuePair ()
+		{
+			key = null;
+			value = null;
+		}
+	}
+	[ComVisible (true)]
+	[ClassInterface (ClassInterfaceType.AutoDual)]
+	public class _I_WwwFormUrlDecoder
+	{
+		private readonly Dictionary<string, string> _params = new Dictionary<string, string> ();
+		public _I_WwwFormUrlDecoder (string query)
+		{
+			if (string.IsNullOrEmpty (query)) return;
+			if (query.StartsWith ("?")) query = query.Substring (1);
+			foreach (var pair in query.Split ('&'))
+			{
+				var kv = pair.Split ('=');
+				if (kv.Length == 2)
+					_params [Uri.UnescapeDataString (kv [0])] = Uri.UnescapeDataString (kv [1]);
+			}
+		}
+		public string GetFirstValueByName (string name)
+		{
+			string value = null;
+			return _params.TryGetValue (name, out value) ? value : null;
+		}
+		public int Size => _params.Count;
+		public _I_KeyValuePair GetAt (uint index)
+		{
+			var pair = _params.ElementAt ((int)index);
+			return new _I_KeyValuePair (pair.Key, pair.Value);
+		}
+	}
+	[ComVisible (true)]
+	[ClassInterface (ClassInterfaceType.AutoDual)]
+	public class _I_Uri: Uri
+	{
+		public _I_Uri (string uri): base (uri) { }
+		public _I_Uri (string baseUri, string relativeUri) : base (new Uri (baseUri), relativeUri) { }
+		public string AbsoluteCanonicalUri => this.GetLeftPart (UriPartial.Authority) + this.PathAndQuery + this.Fragment;
+		public string DisplayIri => Uri.UnescapeDataString (this.OriginalString);
+		public string DisplayUri => Uri.UnescapeDataString (this.OriginalString);
+		public string Domain => ExtractDomain (this.Host);
+		public string Extension => System.IO.Path.GetExtension (this.AbsolutePath)?.TrimStart ('.') ?? "";
+		public string Password => ExtractPassword (this.UserInfo);
+		public string Path => this.AbsolutePath;
+		public object QueryParsed => new _I_WwwFormUrlDecoder (this.Query);
+		public string RawUri => this.OriginalString;
+		public string SchemeName => this.Scheme;
+		public bool Suspicious => !Uri.IsWellFormedUriString (this.OriginalString, UriKind.Absolute);
+		public string UserName => ExtractUserName (this.UserInfo);
+		public _I_Uri CombineUri (string relativeUri)
+		{
+			return new _I_Uri (this.AbsoluteUri, relativeUri);
+		}
+		public static string EscapeComponent (string component)
+		{
+			return Uri.EscapeDataString (component);
+		}
+		public static string UnescapeComponent (string component)
+		{
+			return Uri.UnescapeDataString (component);
+		}
+		private static string ExtractDomain (string host)
+		{
+			var parts = host.Split ('.');
+			if (parts.Length >= 2)
+				return string.Join (".", parts.Skip (1));
+			return host;
+		}
+		private static string ExtractUserName (string userInfo)
+		{
+			if (string.IsNullOrEmpty (userInfo)) return "";
+			var parts = userInfo.Split (':');
+			return parts [0];
+		}
+		private static string ExtractPassword (string userInfo)
+		{
+			if (string.IsNullOrEmpty (userInfo)) return "";
+			var parts = userInfo.Split (':');
+			return parts.Length > 1 ? parts [1] : "";
+		}
+	}
+	[ComVisible (true)]
+	[ClassInterface (ClassInterfaceType.AutoDual)]
+	public class _I_Utilities
+	{
+		public _I_Uri CreateUri (string uri) => new _I_Uri (uri);
+		public _I_Uri CreateUri2 (string baseUri, string relaUri) => new _I_Uri (baseUri, relaUri);
+		public _I_Exception CreateException (string message) => new _I_Exception (message);
+		public _I_Exception CreateException2 (string message, _I_Exception innerEx) => new _I_Exception (message, innerEx);
+		public _I_Calendar CreateCalendar () => new _I_Calendar ();
+		public _I_Calendar CreateCalendar2 (object list) => new _I_Calendar (list);
+		public _I_Calendar CreateCalendar3 (object list, string arg1, string arg2) => new _I_Calendar (list, arg1, arg2);
+		public _I_Calendar CreateCalendar4 (object list, string arg1, string arg2, string arg3) => new _I_Calendar (list, arg1, arg2, arg3);
+		public _I_DateTimeFormatter CreateDateTimeFormatterFromTemplate (string formatTemplate)
+		{
+			return new _I_DateTimeFormatter (formatTemplate);
+		}
+		public _I_DateTimeFormatter CreateDateTimeFormatterFromTemplateAndLanguages (string formatTemplate, object languagesArray)
+		{
+			List<string> languages = JsArrayToStringList (languagesArray);
+			return new _I_DateTimeFormatter (formatTemplate, languages);
+		}
+		public _I_DateTimeFormatter CreateDateTimeFormatterFromTemplateFull (string formatTemplate, object languagesArray,
+																			string geographicRegion, string calendar, string clock)
+		{
+			List<string> languages = JsArrayToStringList (languagesArray);
+			return new _I_DateTimeFormatter (formatTemplate, languages, geographicRegion, calendar, clock);
+		}
+		public _I_DateTimeFormatter CreateDateTimeFormatterFromDateEnums (int year, int month, int day, int dayOfWeek)
+		{
+			return new _I_DateTimeFormatter (
+				(YearFormat)year,
+				(MonthFormat)month,
+				(DayFormat)day,
+				(DayOfWeekFormat)dayOfWeek
+			);
+		}
+		public _I_DateTimeFormatter CreateDateTimeFormatterFromTimeEnums (int hour, int minute, int second)
+		{
+			return new _I_DateTimeFormatter (
+				(HourFormat)hour,
+				(MinuteFormat)minute,
+				(SecondFormat)second
+			);
+		}
+		public _I_DateTimeFormatter CreateDateTimeFormatterFromDateTimeEnums (int year, int month, int day, int dayOfWeek,
+																			int hour, int minute, int second, object languagesArray)
+		{
+			List<string> languages = JsArrayToStringList (languagesArray);
+			return new _I_DateTimeFormatter (
+				(YearFormat)year,
+				(MonthFormat)month,
+				(DayFormat)day,
+				(DayOfWeekFormat)dayOfWeek,
+				(HourFormat)hour,
+				(MinuteFormat)minute,
+				(SecondFormat)second,
+				languages
+			);
+		}
+		public _I_DateTimeFormatter CreateDateTimeFormatterFromDateTimeEnumsFull (int year, int month, int day, int dayOfWeek,
+																				int hour, int minute, int second, object languagesArray,
+																				string geographicRegion, string calendar, string clock)
+		{
+			List<string> languages = JsArrayToStringList (languagesArray);
+			return new _I_DateTimeFormatter (
+				(YearFormat)year,
+				(MonthFormat)month,
+				(DayFormat)day,
+				(DayOfWeekFormat)dayOfWeek,
+				(HourFormat)hour,
+				(MinuteFormat)minute,
+				(SecondFormat)second,
+				languages,
+				geographicRegion,
+				calendar,
+				clock
+			);
+		}
+		private List<string> JsArrayToStringList (object jsArray)
+		{
+			var result = new List<string> ();
+			if (jsArray == null) return result;
+
+			Type type = jsArray.GetType ();
+			try
+			{
+				int length = (int)type.InvokeMember ("length", BindingFlags.GetProperty, null, jsArray, null);
+				for (int i = 0; i < length; i++)
+				{
+					object value = type.InvokeMember (i.ToString (), BindingFlags.GetProperty, null, jsArray, null);
+					if (value != null)
+						result.Add (value.ToString ());
+				}
+			}
+			catch
+			{
+				// 如果无法获取 length，则假设是单个字符串
+				string single = jsArray.ToString ();
+				if (!string.IsNullOrEmpty (single))
+					result.Add (single);
+			}
+			return result;
+		}
+	}
 }

DataUtils/Web.cs

@@ -297,11 +297,18 @@ namespace DataUtils
 				return new HttpResponse (res);
 			}
 		}
-		public void SendAsync (string sBody, string encoding, object pfResolve)
+		public void SendAsync (string sBody, string encoding, object pfResolve, object pfReject)
 		{
 			System.Threading.ThreadPool.QueueUserWorkItem (delegate
 			{
-				JsUtils.Call (pfResolve, Send (sBody, encoding));
+				try
+				{
+					JsUtils.Call (pfResolve, Send (sBody, encoding));
+				}
+				catch (Exception ex)
+				{
+					JsUtils.Call (pfReject, new _I_Exception (ex));
+				}
 			});
 		}
 		public void Dispose () { }