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一、上月英文简写csharpDateTime dt=DateTime.Now;string MM=dt.AddMonths(-1).ToString(MMM, new System.Globalization.CultureInfo(en-us));// 上月英文缩写：Jul

二、本月第一天和最后一天csharpDateTime ThisMonth_First=new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1);DateTime ThisMonth_Last=new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.DaysInMonth(DateTime.Now.Year, DateTime.Now.Month));

一、月份英文简写

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

二、当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;//当天时间 DateTime ThisMonth = new DateTime(Today.Year, Today.Month, 1);//当前月第一天时间 DateTime LastMonth_First = ThisMonth.AddMonths(-1);//上月第一天时间 DateTime LastMonth_Last = ThisMonth.AddDays(-1);//上月最后一天时间

四、本周第几天

int daysInWeek1 = (int)DateTime.Now.DayOfWeek;//注意：此处周,日时返回0， int daysInWeek2 = (int)DateTime.Now.DayOfWeek == 0 ? 7 : (int)DateTime.Now.DayOfWeek;//当前周第几天,注释:周日为0

五、本月第几周

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

六、本年第几周

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、前几周的周一和周日

private void FEDayInLastWeek() { int N = 3;//前几周参数 DateTime Today = DateTime.Now; int daysInWeek = (int)Today.DayOfWeek == 0 ? 7 : (int)Today.DayOfWeek;//当前周第几天,注释:周日为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、本周一和当前日

private void FristDayToNowInThisWeek() { int daysInWeek = (int)DateTime.Now.DayOfWeek == 0 ? 7 : (int)DateTime.Now.DayOfWeek;//当前周第几天,注释:周日为0 //起始日期 DateTime firstDay = DateTime.Now.AddDays(1 - daysInWeek); DateTime lastDay = DateTime.Now; }

C#中控件绑定时间栏位格式化

Bind("查询出的栏位", "{0:yyyy/MM/dd}")

到此这篇关于C#常用日期时间方法的文章就介绍到这了。希望对大家的学习有所帮助，也希望大家多多支持自由互联。