private static string GetDateTimeUtcOffsetValue(TimeSpan offset, DateTimeUtcOffset utcOffset)
{
var checkPatterm = Regex.IsMatch(offset.ToString(), @"^\d{2}:\d{2}:\d{2}$", RegexOptions.IgnoreCase);
var vSign = string.Empty;
var vHH = string.Empty;
var vMM = string.Empty;
var vSS = string.Empty;
var offsetText = offset.ToString();
if (checkPatterm)
{
vSign = "+";
offsetText = offsetText.Substring(0, offsetText.Length);
}
else
{
vSign = "-";
offsetText = offsetText.Substring(1, offsetText.Length - 1);
}
string[] splitOffset = offsetText.Split(':');
vHH = splitOffset[0];
vMM = splitOffset[1];
vSS = splitOffset[2];
if (utcOffset == DateTimeUtcOffset.HHMMByColon)
{
return(vSign + vHH + ":" + vMM);
}
else if (utcOffset == DateTimeUtcOffset.HHMM)
{
return(vSign + vHH + vMM);
}
else if (utcOffset == DateTimeUtcOffset.HH)
{
return(vSign + vHH);
}
else
{
return("");
}
}
/// <summary>
/// ใช้สำหรับแสดงวันเวลาปัจจุบัน (UTC) ให้อยู่ในรูปแบบตามที่ระบุ โดยใช้ Time Zone ไทย (GMT +07:00 - SE Asia Standard Time)
/// </summary>
/// <param name="format"></param>
/// <param name="culture"></param>
/// <param name="isShowOffset"></param>
/// <returns></returns>
public static string GetCurrentUtcDateTimeInThaiTimeZone(DateTimeFormat format, LanguageCultureName culture, DateTimeUtcOffset utcOffset)
{
var formatValue = GetDateTimeFormatValue(format);
var cultureValue = GetCultureValue(culture);
var currentUtc = DateTime.UtcNow;
var timezone = TimeZoneInfo.FindSystemTimeZoneById("SE Asia Standard Time"); //https://msdn.microsoft.com/en-us/library/ms912391(v=winembedded.11).aspx
var convertedTime = TimeZoneInfo.ConvertTimeFromUtc(currentUtc, timezone);
var offset = timezone.GetUtcOffset(currentUtc);
if (utcOffset != DateTimeUtcOffset.Null)
{
return(convertedTime.ToString(formatValue, CultureInfo.CreateSpecificCulture(cultureValue)) + GetDateTimeUtcOffsetValue(offset, utcOffset));
}
else
{
return(convertedTime.ToString(formatValue, CultureInfo.CreateSpecificCulture(cultureValue)));
}
}
/// <summary>
/// ใช้สำหรับแปลงวันเวลาที่ระบุ ให้เป็นวันเวลา (UTC) อยู่ในรูปแบบตามที่ระบุ โดยใช้ Time Zone ตามที่ระบุ
/// </summary>
/// <param name="datetime"></param>
/// <param name="timeZoneId"></param>
/// <param name="format"></param>
/// <param name="culture"></param>
/// <param name="utcOffset"></param>
/// <returns></returns>
public static string ConvertToUtcDateTimeByTimeZoneId(DateTime datetime, TimeZoneDisplayName timezoneId, DateTimeFormat format, LanguageCultureName culture, DateTimeUtcOffset utcOffset)
{
var timezoneValue = GetTimeZoneValue(timezoneId);
var formatValue = GetDateTimeFormatValue(format);
var cultureValue = GetCultureValue(culture);
var datetimeUtc = datetime.ToUniversalTime();
var timezone = TimeZoneInfo.FindSystemTimeZoneById(timezoneValue); //https://msdn.microsoft.com/en-us/library/ms912391(v=winembedded.11).aspx
var convertedTime = TimeZoneInfo.ConvertTimeFromUtc(datetimeUtc, timezone);
var offset = timezone.GetUtcOffset(datetimeUtc);
if (utcOffset != DateTimeUtcOffset.Null)
{
return(convertedTime.ToString(formatValue, CultureInfo.CreateSpecificCulture(cultureValue)) + GetDateTimeUtcOffsetValue(offset, utcOffset));
}
else
{
return(convertedTime.ToString(formatValue, CultureInfo.CreateSpecificCulture(cultureValue)));
}
}
/// <summary>
/// ใช้สำหรับแปลงวันเวลาที่ระบุ ให้เป็นวันเวลา (UTC) อยู่ในรูปแบบตามที่ระบุ โดยใช้ Time Zone ไทย (GMT +07:00 - SE Asia Standard Time)
/// </summary>
/// <param name="datetime"></param>
/// <param name="format"></param>
/// <param name="culture"></param>
/// <param name="isShowOffset"></param>
/// <returns></returns>
public static string ConvertToUtcDateTimeInThaiTimeZone(DateTime datetime, DateTimeFormat format, LanguageCultureName culture, DateTimeUtcOffset utcOffset)
{
var formatValue = GetDateTimeFormatValue(format);
var cultureValue = GetCultureValue(culture);
var datetimeUtc = datetime.ToUniversalTime();
var timezone = TimeZoneInfo.Local;
try
{
timezone = TimeZoneInfo.FindSystemTimeZoneById("Asia/Bangkok"); //https://docs.microsoft.com/en-us/rest/api/maps/timezone/gettimezoneenumwindows
}
catch
{
try
{
timezone = TimeZoneInfo.FindSystemTimeZoneById("SE Asia Standard Time"); //https://msdn.microsoft.com/en-us/library/ms912391(v=winembedded.11).aspx
}
catch
{
timezone = TimeZoneInfo.Local;
}
}
var convertedTime = TimeZoneInfo.ConvertTimeFromUtc(datetimeUtc, timezone);
var offset = timezone.GetUtcOffset(datetimeUtc);
if (utcOffset != DateTimeUtcOffset.Null)
{
return(convertedTime.ToString(formatValue, CultureInfo.CreateSpecificCulture(cultureValue)) + GetDateTimeUtcOffsetValue(offset, utcOffset));
}
else
{
return(convertedTime.ToString(formatValue, CultureInfo.CreateSpecificCulture(cultureValue)));
}
}
