获取某个月的第一天和最后一天

来源：互联网发布：淘宝店招950x120 编辑：程序博客网时间：2024/05/17 23:23

网上有很多种实现方式，我比较倾向于下面这种方式。我为了熟悉下委托的用法，用了下面的写法，高手们见笑了啊！其实是完全可以不用委托。

        protected delegate DateTime DayofMonth(int year, int month);
        DateTime dayNow = DateTime.Now;
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                DayofMonth GetFirstDay = new DayofMonth(FirstDayOfMonth);
                firstDay.Value = GetFirstDay(dayNow.Year, dayNow.Month);

                DayofMonth GetLastDay = new DayofMonth(LastDayOfMonth);
                lastDay.Value = GetLastDay(dayNow.Year, dayNow.Month);
            }
        }

        protected DateTime FirstDayOfMonth(int year, int month)
        {
            string firstDay = year.ToString() + "-" + month.ToString() + "-" + "1";
            return Convert.ToDateTime(firstDay);
        }

        protected DateTime LastDayOfMonth(int year, int month)
        {
            string lastDay = year.ToString() + "-" + month.ToString() + "-" + DateTime.DaysInMonth(year, month);
            return Convert.ToDateTime(lastDay);
        }

上面是源码直接黏贴过来了。firstDay这个控件是我自定义的用户控件，将在另外一篇日历控件中介绍。