Question

我想获得当月周末的日期列表。有什么办法可以将所有周末日期存储在我的列表中

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

我想将周末日期存储在当月的mylist中，并与下个月相同我使用asp.net日历控件，我想在我的列表中保存周末日期。

Answer 1

本月，您可以

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);
    }
}

下个月你可以做一些非常相似的事情。

Answer 2

每月的每个星期都重复这个

 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);
        }

请注意：

下周：

date.AddDays(7);

前一周：

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;
}

如何获取当前月份使用c＃在asp.net中的日历控件列表

3 个答案: