/// <summary>
/// Previous
/// </summary>
/// <param name="ldt"></param>
/// <param name="dayOfWeek"></param>
/// <returns></returns>
public static LocalDateTime Previous(this LocalDateTime ldt, DayOfWeek dayOfWeek)
{
do
{
ldt = ldt.PreviousDay();
} while (ldt.DayOfWeek != dayOfWeek.AsIsoDayOfWeek());
return(ldt);
}
/// <summary>
/// Next
/// </summary>
/// <param name="ldt"></param>
/// <param name="dayOfWeek"></param>
/// <returns></returns>
public static LocalDateTime Next(this LocalDateTime ldt, DayOfWeek dayOfWeek)
{
do
{
ldt = ldt.NextDay();
} while (ldt.DayOfWeek != dayOfWeek.AsIsoDayOfWeek());
return(ldt);
}
/// <summary>
/// Returns the previous date with the specified day-of-week, or the original date, if the day is already correct.<br/>
/// 返回具有指定星期几的上一个日期，或者返回原始日期（如果该日期已经正确）。
/// </summary>
/// <param name="ld"></param>
/// <param name="dayOfWeek"></param>
/// <returns></returns>
public static LocalDate PreviousOrSame(this LocalDate ld, DayOfWeek dayOfWeek)
{
return(DateAdjusters.PreviousOrSame(dayOfWeek.AsIsoDayOfWeek())(ld));
}
/// <summary>
/// Returns the next date with the specified day-of-week. <br/>
/// 返回具有指定星期几的下一个日期。
/// </summary>
/// <param name="ld"></param>
/// <param name="dayOfWeek"></param>
/// <returns></returns>
public static LocalDate Next(this LocalDate ld, DayOfWeek dayOfWeek)
{
return(DateAdjusters.Next(dayOfWeek.AsIsoDayOfWeek())(ld));
}