asp.Net to get the first day of the week the first day of the month and so on
2020-05-07 19:27:16
OfStack
DateTime dt = DateTime.Now;
// The first of this month 1 Day time
DateTime dt_First = dt.AddDays(-(dt.Day) + 1);
Label1.Text = dt_First.ToString("yyyy-MM-dd");
// Count the months +1
DateTime dt2 = dt.AddMonths(1);
// The last of this month 1 Day time
DateTime dt_Last = dt2.AddDays(-(dt.Day));
Label2.Text = dt_Last.ToString("yyyy-MM-dd");
int weeknow = Convert.ToInt32(System.DateTime.Now.DayOfWeek);
int daydiff = (-1) * weeknow + 1;
int dayadd = 7 - weeknow;
// This week the first 1 day
lblBegin.Text = System.DateTime.Now.AddDays(daydiff).ToString("yyyy-MM-dd");
// This week the last 1 day
lblEnd.Text = System.DateTime.Now.AddDays(dayadd).ToString("yyyy-MM-dd");