/// <summary>
/// YYYYMMDD形式の文字列をDateTimeに変換する
/// </summary>
/// <param name="s">YYYYMMDD形式の文字列</param>
/// <returns>DateTime?</returns>
public static DateTime?YYYYMMDD2DateTime(string s)
{
var match = Regex.Match(s, @"^(\d{4})(\d{2})(\d{2})$");
if (match.Success)
{
return(EtcUtil.SafeExecute(() =>
{
return (DateTime?)new DateTime(
int.Parse(match.Groups[1].Value),
int.Parse(match.Groups[2].Value),
int.Parse(match.Groups[3].Value));
}, (DateTime?)null).Value);
}
else
{
return(null);
}
}
/// <summary>
/// DateTimeを生成する。引数が不正の場合はNULLを返す。(9)
/// </summary>
/// <param name="year">年</param>
/// <param name="month">月</param>
/// <param name="day">日</param>
/// <param name="calendar">カレンダー</param>
/// <returns>DateTime?</returns>
public static DateTime?Create(int year, int month, int day, Calendar calendar)
=> EtcUtil.SafeExecute(
() => (DateTime?)new DateTime(year, month, day, calendar), (DateTime?)null).Value;
/// <summary>
/// DateTimeを生成する。引数が不正の場合はNULLを返す。(6)
/// </summary>
/// <param name="year">年</param>
/// <param name="month">月</param>
/// <param name="day">日</param>
/// <param name="hour">時</param>
/// <param name="minute">分</param>
/// <param name="second">秒</param>
/// <param name="kind">種別</param>
/// <returns>DateTime?</returns>
public static DateTime?Create(int year, int month, int day, int hour, int minute, int second, DateTimeKind kind)
=> EtcUtil.SafeExecute(
() => (DateTime?)new DateTime(year, month, day, hour, minute, second, kind),
(DateTime?)null).Value;
/// <summary>
/// DateTimeを生成する。引数が不正の場合はNULLを返す。(3)
/// </summary>
/// <param name="year">年</param>
/// <param name="month">月</param>
/// <param name="day">日</param>
/// <param name="hour">時</param>
/// <param name="minute">分</param>
/// <param name="second">秒</param>
/// <param name="millisecond">mm秒</param>
/// <param name="calendar">カレンダー</param>
/// <returns>DateTime?</returns>
public static DateTime?Create(int year, int month, int day, int hour, int minute, int second, int millisecond, Calendar calendar)
=> EtcUtil.SafeExecute(
() => (DateTime?)new DateTime(year, month, day, hour, minute, second, millisecond, calendar),
(DateTime?)null).Value;
