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C#常用日期時(shí)間方法匯總

 更新時(shí)間：2022年04月23日 08:34:21   作者：農(nóng)碼一生  
這篇文章介紹了C#常用的日期時(shí)間方法，文中通過示例代碼介紹的非常詳細(xì)。對(duì)大家的學(xué)習(xí)或工作具有一定的參考借鑒價(jià)值，需要的朋友可以參考下

一、月份英文簡(jiǎn)寫

DateTime dt = DateTime.Now;
string MM = dt.AddMonths(-1).ToString("MMM", new System.Globalization.CultureInfo("en-us"));//月英文縮寫：Jul

二、當(dāng)月第一天和最后一天

DateTime ThisMonth_Frist = DateTime.Now.AddDays(1 - DateTime.Now.Day).Date;
DateTime ThisMOnth_Last = DateTime.Now.AddDays(1 - DateTime.Now.Day).Date.AddMonths(1).AddSeconds(-1);

三、上月第一天和最后一天

DateTime Today = DateTime.Today;//當(dāng)天時(shí)間
DateTime ThisMonth = new DateTime(Today.Year, Today.Month, 1);//當(dāng)前月第一天時(shí)間
DateTime LastMonth_First = ThisMonth.AddMonths(-1);//上月第一天時(shí)間
DateTime LastMonth_Last = ThisMonth.AddDays(-1);//上月最后一天時(shí)間

四、本周第幾天

int daysInWeek1 = (int)DateTime.Now.DayOfWeek;//注意：此處周,日時(shí)返回0，
int daysInWeek2 = (int)DateTime.Now.DayOfWeek == 0 ? 7 : (int)DateTime.Now.DayOfWeek;//當(dāng)前周第幾天,注釋:周日為0

五、本月第幾周

int a = WeekOfMonth(DateTime.Now, false);//

六、本年第幾周

        private int WeekOfYear()
        {
            var dt = DateTime.Now;
            int firstWeekend = Convert.ToInt32(DateTime.Parse(dt.Year + "-1-1").DayOfWeek);
            int weekDay = firstWeekend == 0 ? 1 : (7 - firstWeekend + 1);
            int currentDay = dt.DayOfYear;
            int current_week = Convert.ToInt32(Math.Ceiling((currentDay - weekDay) / 7.0)) + 1;
            return current_week;
        }

七、前幾周的周一和周日

        private void FEDayInLastWeek()
        {
            int N = 3;//前幾周參數(shù)
            DateTime Today = DateTime.Now;
            int daysInWeek = (int)Today.DayOfWeek == 0 ? 7 : (int)Today.DayOfWeek;//當(dāng)前周第幾天,注釋:周日為0
           
            for (int i = N; i > 0; i--)
            {
                //起始日期
                DateTime firstDay = Today.AddDays(1 - (7 * i + daysInWeek));
                DateTime lastDay = Today.AddDays(7 - (7 * i + daysInWeek));
            }
        }

八、本周一和當(dāng)前日

        private void FristDayToNowInThisWeek()
        {
            int daysInWeek = (int)DateTime.Now.DayOfWeek == 0 ? 7 : (int)DateTime.Now.DayOfWeek;//當(dāng)前周第幾天,注釋:周日為0
            //起始日期
            DateTime firstDay = DateTime.Now.AddDays(1 - daysInWeek);
            DateTime lastDay = DateTime.Now;
        }

C#中控件綁定時(shí)間欄位格式化

Bind("查詢出的欄位", "{0:yyyy/MM/dd}")

到此這篇關(guān)于C#常用日期時(shí)間方法的文章就介紹到這了。希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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