如何獲得當前月份使用c＃在asp.net中使用週末列表的日曆控件＃

Question

我想獲取當前週末的日期列表。 是有什麼辦法可以將所有周末的日期在我的名單

list<datetime> mylist=new list<datetime>(); 

我想週末日期存儲在當月的MYLIST並用相同未來幾個月 即時通訊使用asp.net壓延控制，我想將週末日期保存在我的列表中。

Answer 1

對於當月，你可以做

var startDate = DateTime.Now; 
var first = new DateTime(startDate.Year, startDate.Month, 1); 
List<DateTime> weekends = new List<DateTime>(); 
for (int i = 0; i <= DateTime.DaysInMonth(startDate.Year, startDate.Month); i++) 
{ 
    var nextDay = first.AddDays(i); 
    if (nextDay.DayOfWeek == DayOfWeek.Saturday || nextDay.DayOfWeek == DayOfWeek.Sunday) 
    { 
     weekends.Add(nextDay); 
    } 
} 

你可以做下個月的非常類似的東西。

Answer 2

重複此月的每週

DateTime date = DateTime.Now; 
     DateTime saturday; 
     DateTime sunday; 
     if (date.DayOfWeek == DayOfWeek.Monday) 
     { 
      saturday = date.AddDays(5); 
      sunday = date.AddDays(6); 
     }else if (date.DayOfWeek == DayOfWeek.Tuesday) 
     { 
      saturday = date.AddDays(4); 
      sunday = date.AddDays(5); 
     } 
     else if (date.DayOfWeek == DayOfWeek.Wednesday) 
     { 
      saturday = date.AddDays(3); 
      sunday = date.AddDays(4); 
     } 
     else if (date.DayOfWeek == DayOfWeek.Thursday) 
     { 
      saturday = date.AddDays(2); 
      sunday = date.AddDays(3); 
     } 
     else if (date.DayOfWeek == DayOfWeek.Friday) 
     { 
      saturday = date.AddDays(1); 
      sunday = date.AddDays(2); 
     } 
     else if (date.DayOfWeek == DayOfWeek.Saturday) 
     { 
      saturday = date.AddDays(0); 
      sunday = date.AddDays(1); 
     } 
     else if (date.DayOfWeek == DayOfWeek.Sunday) 
     { 
      saturday = date.AddDays(-1); 
      sunday = date.AddDays(0); 
     } 

注：

下週：

date.AddDays(7); 

前一週：

date.AddDays(-7); 

Answer 3

// Get weekend days of visible moth 
public List<DateTime> getWeekEndDays(DateTime dt) 
{ 
    List<DateTime> result = new List<DateTime>(); 

    int month = dt.Month; 
    dt = dt.AddDays(-dt.Day + 1);//Sets dt to first day of month 

    //Sets dt to the first week-end day of the month; 
    if (dt.DayOfWeek != DayOfWeek.Sunday) 
     while (dt.DayOfWeek != DayOfWeek.Saturday) 
      dt = dt.AddDays(1); 

    //Adds the week-end day and stops when next month is reached. 
    while (dt.Month == month) 
    { 
     result.Add(dt); 
     dt = dt.AddDays(dt.DayOfWeek == DayOfWeek.Saturday ? 1 : 6); 
    } 
    return result; 
}