如何在C＃中获得本月的最后一天？

Question

如何在C＃中找到该月的最后一天？

Answer 1

另一种方法：

DateTime today = DateTime.Today;
DateTime endOfMonth = new DateTime(today.Year, 
                                   today.Month, 
                                   DateTime.DaysInMonth(today.Year, 
                                                        today.Month));

Answer 2

类似的东西：

DateTime today = DateTime.Today;
DateTime endOfMonth = new DateTime(today.Year, today.Month, 1).AddMonths(1).AddDays(-1);

也就是说你得到下个月的第一天，然后减去一天。框架代码将处理月份长度，闰年等事情。

Answer 3

public static class DateTimeExtensions
{
    public static DateTime LastDayOfMonth(this DateTime date)
    {
        return date.AddDays(1-(date.Day)).AddMonths(1).AddDays(-1);
    }
}

Answer 4

DateTime.DaysInMonth(DateTime.Now.Year, DateTime.Now.Month)

Answer 5

试试这个。它会解决你的问题。

 var lastDayOfMonth = DateTime.DaysInMonth(int.Parse(ddlyear.SelectedValue), int.Parse(ddlmonth.SelectedValue));
DateTime tLastDayMonth = Convert.ToDateTime(lastDayOfMonth.ToString() + "/" + ddlmonth.SelectedValue + "/" + ddlyear.SelectedValue);