如何使用c#在asp.net中获取日历控件的当月周末列表

本文关键字：控件 列表 周末 日历 获取 何使用 asp net | 更新日期: 2023-09-27 18:00:32

我想得到当月周末的日期列表。有什么方法可以把所有周末的日期都存储在列表中吗

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

我想把周末日期存储在当月的mylist中，与下个月相同我正在使用asp.net日历控件，我想把周末的日期保存在我的列表中。

如何使用c#在asp.net中获取日历控件的当月周末列表

对于当前月份，您可以进行

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);
    }
}

你可以在下个月做一些类似的事情。

在每月的每一周重复此操作

 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：

下周：

date.AddDays(7);

上周：

date.AddDays(-7);

// 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;
}
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