如何在C＃的日期范围内获得所有周末

我只是想知道是否有一个简单的方法或框架来使所有周末在C＃的日期范围内？

是否可以使用LINQ？

任何线索？

谢谢！

Answer 1

如果您想要枚举所有日子，可以使用linq过滤到周末：

IEnumerable GetDaysBetween(DateTime start, DateTime end) { for (DateTime i = start; i < end; i = i.AddDays(1)) { yield return i; } } var weekends = GetDaysBetween(DateTime.Today, DateTime.Today.AddDays(365)) .Where(d => d.DayOfWeek == DayOfWeek.Saturday || d.DayOfWeek == DayOfWeek.Sunday); 

Answer 2

我发现了怎么做。

http://www.dotnetjalps.com/2011/06/finding-saturdaysunday-between-date.html

 namespace DatimeApplication { class Program { static void Main(string[] args) { DateTime startDate=new DateTime(2011,3,1); DateTime endDate = DateTime.Now; TimeSpan diff = endDate - startDate; int days = diff.Days; for (var i = 0; i <= days; i++) { var testDate = startDate.AddDays(i); switch (testDate.DayOfWeek) { case DayOfWeek.Saturday: case DayOfWeek.Sunday: Console.WriteLine(testDate.ToShortDateString()); break; } } Console.ReadLine(); } } } 

Answer 3

这不是很难编码…这是一个有效的迭代器：

 public static IEnumerable GetWeekends(DateTime startDate, DateTime endDate) { startDate = startDate.Date; endDate = endDate.Date; if (endDate < startDate) yield break; var currentDate = startDate; // Advance to next Saturday switch (currentDate.DayOfWeek) { case DayOfWeek.Saturday: break; case DayOfWeek.Sunday: yield return currentDate; currentDate = currentDate.AddDays(6); break; default: currentDate = currentDate.AddDays(DayOfWeek.Saturday - currentDate.DayOfWeek); break; } while (currentDate <= endDate) { yield return currentDate; currentDate = currentDate.AddDays(1); if (currentDate <= endDate) yield return currentDate; currentDate = currentDate.AddDays(6); } }