/// <summary>
/// 「DateTime」轉「民國日期時間數字字串」
/// 例：DateTime --> 105/02/16 或 DateTime --> 1050216 或 DateTime --> 1050216125225
/// </summary>
/// <param name="dateTime">DateTime</param>
/// <param name="format">轉換格式(與DateTime.ToString方法相同)</param>
/// <returns>民國日期時間數字字串</returns>
public static string DateTimeToTWDateTimeNum(DateTime dateTime, string format)
{
//取得年份的Format
string yearPattern = @"([yY]+)";
Match result = Regex.Match(format, yearPattern);
//取得非年份的Format
string notYearPattern = @"([^yY]+)";
Match otherResult = Regex.Match(format, notYearPattern);
//取得民國年
int year = new TaiwanCalendar().GetYear(dateTime);
//把y或Y取代成0 (ToString用法，以0取代預留位置)
string yearFormat = result.Value.Replace("y", "Y").Replace("Y", "0");
//回傳格式
return(year.ToString(yearFormat) + dateTime.ToString(otherResult.Value));
}
public static void Main()
{
// Create an instance of the calendar.
TaiwanCalendar myCal = new TaiwanCalendar();
Console.WriteLine(myCal.ToString());
// Create an instance of the GregorianCalendar.
GregorianCalendar myGre = new GregorianCalendar();
// Display the MinValue and its equivalent in the GregorianCalendar.
DateTime myMin = myCal.MinSupportedDateTime;
Console.Write("MinSupportedDateTime: {0:D2}/{1:D2}/{2:D4}", myCal.GetMonth(myMin), myCal.GetDayOfMonth(myMin), myCal.GetYear(myMin));
Console.WriteLine(" (in Gregorian, {0:D2}/{1:D2}/{2:D4})", myGre.GetMonth(myMin), myGre.GetDayOfMonth(myMin), myGre.GetYear(myMin));
// Display the MaxValue and its equivalent in the GregorianCalendar.
DateTime myMax = myCal.MaxSupportedDateTime;
Console.Write("MaxSupportedDateTime: {0:D2}/{1:D2}/{2:D4}", myCal.GetMonth(myMax), myCal.GetDayOfMonth(myMax), myCal.GetYear(myMax));
Console.WriteLine(" (in Gregorian, {0:D2}/{1:D2}/{2:D4})", myGre.GetMonth(myMax), myGre.GetDayOfMonth(myMax), myGre.GetYear(myMax));
}