不要在日期时间包括周末

我只是想知道如何计算DateTime而不包括周末（目前正在建立一个图书馆系统）。 图书馆周末没有营业，这就是为什么我需要计算不包括周末的日期。 防爆。 2015年3月13日=星期五，我借了5天。 所以，返回日期应该是03/20/15 =周五（因为我没有包括周末）你能告诉我还是给我一些想法？ 谢谢！

编辑:(当我键入数字时，程序突然冻结）

int days = 0; DateTime deyt = DateTime.Now; rd.Text = deyt.ToString("MM/dd/yy"); DateTime dt = deyt.AddDays(int.Parse(textBox3.Text)); DateTime span = deyt; while (span < dt.AddDays(1)) { if (span.DayOfWeek != DayOfWeek.Saturday && span.DayOfWeek != DayOfWeek.Sunday) { days++; span = span.AddDays(1); bd.Text = days.ToString("MM/dd/yy"); } } 

Answer 1

如果您有DateTimes列表，则可以过滤周末日期：

 public static List GetDatesWithoutWeekends(List dates) { return dates.Where(date => (date.DayOfWeek != DayOfWeek.Saturday && date.DayOfWeek != DayOfWeek.Sunday)) .ToList(); } 

Answer 2

 DateTime date = DateTime.Now // Set your Date if (date.DayOfWeek != DayOfWeek.Saturday && date.DayOfWeek != DayOfWeek.Sunday) { //TODO } 

Answer 3

有很多有效的方法可以在很长一段时间内完成这项工作，但如果你的代码只处理小值，你可以使用：

 static DateTime AddDaysExcludingWeekends(DateTime start, int days) { // Do you need this? if (days < 0) { throw new ArgumentException("Not implemented yet..."); } DateTime current = start; for (int i = 0; i < days; days++) { current = current.AddDays(1); if (current.DayOfWeek == DayOfWeek.Sunday || current.DayOfWeek == DayOfWeek.Saturday) { // Effectively force "go round again" behaviour. i--; } } return current; } 

或者另一种方法：

 static DateTime AddDaysExcludingWeekends(DateTime start, int days) { // Do you need this? if (days < 0) { throw new ArgumentException("Not implemented yet..."); } DateTime current = start; for (int i = 0; i < days; days++) { // Loop at least once, and keep going until we're on // a weekday. do { current = current.AddDays(1); } while (current.DayOfWeek == DayOfWeek.Sunday || current.DayOfWeek == DayOfWeek.Saturday); } return current; } 

请注意，如果您传入days = 0，即使是在周末，也会返回原始日期。 目前尚不清楚你是否想要这种行为，或者它是否应该跳到星期一。

Answer 4

  This is your code... Try.. int days = 0; DateTime deyt = DateTime.Now; DateTime dt = deyt.AddDays(int.Parse(textBox3.Text)); DateTime span = deyt; while (span <= dt) { if (span.DayOfWeek != DayOfWeek.Saturday && span.DayOfWeek != DayOfWeek.Sunday) { days++; bd.Text = days.ToString(); Console.WriteLine(span.ToString("MM/dd/yy")); } span = span.AddDays(1); }