如何获得该月的最后一天 [英] How to get the last day of the month

问题描述

请知道如何获得本月的最后一天。



i我正在写一个代码，需要我提供一个到期日期作为参数，现在即将到期的日期是该月的最后一个日期。



i今天可以通过这样做来获得

 DateTime now = DateTime.Today; 

但是如何获得本月的最后一个日期呢。 />


谢谢



我尝试过：



DateTime now = DateTime.Today



就像我之前解释的那样......



i只需要一种方法来获得本月的最后一天。



谢谢。

解决方案

关于Google如何： Google forc＃Last Day of Month [ ^ ]



你会轻松地发现它必须是这样的：

今天的DateTime = DateTime.Today; 
  int  lastDay = DateTime.DaysInMonth（today.Year，today.Month）; 

< blockquote>如果提供日期，您可以通过以下代码获得当月的最后一天。

 public static DateTime GetLastDayOfMonth（this DateTime dateTime）
 {
返回new DateTime（dateTime.Year，dateTime。 Month，DateTime.DaysInMonth（dateTime.Year，dateTime.Month））; 
} 

  //  获取最后一天 
今日DateTime = DateTime.Now; 
  int  lastDay = DateTime.DaysInMonth（today.Year，today.Month）;  //   31  
 
 
  //  获取上次日期 
 DateTime firstDate =  new  DateTime （today.Year，today.Month， 1 ）; 
 DateTime lastDate = firstDate.AddMonths（ 1 ）。AddDays（-1）;  //   {07/31/2016 00:00:00}  

please i will like to know how to get the last day of the month.

i am writing a code which needs me to provide an expiring date as a parameter, now the expiring date as to be the last date of the month.

i can get today date by doing this

DateTime now = DateTime.Today;

but how do i get the last date of the month with this.

thanks

What I have tried:

DateTime now = DateTime.Today

like i explained earlier...

i just need a way to get the last day of the month.

thank you.

解决方案

How is about Google: Google for "c# Last Day of Month"[^]

You will easely find it has to be something like this:

DateTime today = DateTime.Today;
int lastDay = DateTime.DaysInMonth(today.Year, today.Month);

If date is provided you can get last day in the month by below code.

public static DateTime GetLastDayOfMonth(this DateTime dateTime)
{
    return new DateTime(dateTime.Year, dateTime.Month, DateTime.DaysInMonth(dateTime.Year, dateTime.Month));
}

// To get Last Day
       DateTime today = DateTime.Now;
       int lastDay = DateTime.DaysInMonth(today.Year, today.Month); //31


       // To Get Last Date
       DateTime firstDate = new DateTime(today.Year, today.Month, 1);
       DateTime lastDate = firstDate.AddMonths(1).AddDays(-1); // {07/31/2016 00:00:00}

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