[英]How to get start and end date of week by using week number and year and insert those dates into mysql table in c#
[英]Given a week number in C#, how can I gain start and end dates of that week?
我想编写一个函数,该函数在一年中获取星期数,并返回该星期的开始日期。 另外一个获取周数并返回该周结束日期的函数。
伪代码:
public DateTime GetSaturdayDateOfWeek(int weekNumberInYear)
{
// calculations, that finds the Saturday of that week, 00:00:00 of midnight
return DateTime.Now;
}
public DateTime GetFriddayDateOfWeek(int weekNumberInYear)
{
// calculations, that finds the Friday of that week, 23:59:59
return DateTime.Now;
}
如何计算这些日期?
这个问题在PHP中 ,对我没有帮助。 这个问题也得到一个月的星期数 。 我有一年中的星期几。
它不是很漂亮,并且Zohar Peled的评论非常有效,但这适用于“正常”(缺少更好的单词)日历。 (即:没有本地化,没有什么特别的)这应该提供足够的基础。
public DateTime GetSaturdayDateOfWeek(int weekNumberInYear)
{
var myDate = new DateTime(DateTime.Now.Year, 1, 1);
myDate = myDate.AddDays((weekNumberInYear -1)* 7);
if (myDate.DayOfWeek < DayOfWeek.Saturday)
{
myDate = myDate.AddDays(DayOfWeek.Saturday - myDate.DayOfWeek);
}
if (myDate.DayOfWeek > DayOfWeek.Saturday)
{
myDate = myDate.AddDays(myDate.DayOfWeek - DayOfWeek.Saturday);
}
return myDate;
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.