What are the common date-time methods in C #

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January and Month English Abbreviations

DateTime dt = DateTime.Now;string MM = dt.AddMonths(-1).ToString("MMM", new System.Globalization.CultureInfo("en-us"));//Month English abbreviation: Jul

First and last day of the month

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);

Third, the first and last day of last month

DateTime Today = DateTime.Today;//DateTime ThisMonth = new DateTime(Today.Year, Today.Month, 1);//DateTime LastMonth_First = ThisMonth.AddMonths(-1);//DateTime LastMonth_Last = ThisMonth.AddDays(-1);//DateTime Last Day of Last Month

4. Days of the week

int daysInWeek1 = (int)DateTime.Now.DayOfWeek;//Note: Week, DayTime returns 0 here, int daysInWeek2 = (int)DateTime.Now.DayOfWeek == 0 ? 7 : (int)DateTime.Now.DayOfWeek;//the day of the week, note: Sunday is 0

V. Weeks of the month

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

6. Weeks of the year

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; }

7. Mondays and Sundays in previous weeks

private void FEDayInLastWeek() { int N = 3;//parameters of previous weeks DateTime Today = DateTime.Now; int daysInWeek = (int)Today.DayOfWeek == 0 ? 7 : (int)Today.DayOfWeek;//the day of the current week, note: Sunday is 0 for (int i = N; i > 0; i--) { //Start Date DateTime firstDay = Today.AddDays(1 - (7 * i + daysInWeek)); DateTime lastDay = Today.AddDays(7 - (7 * i + daysInWeek)); } }

8. This Monday and the Current Day

private void FristDayToNowInThisWeek() { int daysInWeek = (int)DateTime.Now.DayOfWeek == 0 ? 7 : (int)DateTime.Now.DayOfWeek;//the day of the week, note: Sunday is 0 //Start Date DateTime firstDay = DateTime.Now.AddDays(1 - daysInWeek); DateTime lastDay = DateTime.Now; }

C#controls bind time field formatting

Bind("queried fields", "{0: yy/MM/dd}") At this point, I believe everyone has a deeper understanding of "what are the common date and time methods of C#". You may wish to actually operate it! Here is the website, more related content can enter the relevant channels for inquiry, pay attention to us, continue to learn!