Obtain the date of this week, next week, and last week based on the current time.

Click the button to change the week and obtain the specific date of the week, last week, and next week.

Some online methods are used for reference.

                           DateTime beginDate = getWeekUpOfDate(DateTime.Now, DayOfWeek.Monday, );         DateTime endDate = getWeekUpOfDate(DateTime.Now, DayOfWeek.Sunday, );                               DateTime getWeekUpOfDate(DateTime dt, DayOfWeek weekday,  wd1 = ( wd2 = ( wd2 == wd1 ? dt.AddDays( * Number) : dt.AddDays( * Number - wd2 + wd1);

Change weekly button event btnThisWeek_Click (beginDate = getWeekUpOfDate (DateTime. now, DayOfWeek. monday,); endDate = getWeekUpOfDate (DateTime. now, DayOfWeek. sunday,); btnLastWeek_Click (beginDate = getWeekUpOfDate (DateTime. now, DayOfWeek. monday,-); endDate = getWeekUpOfDate (DateTime. now, DayOfWeek. sunday,); btnNextWeek_Click (beginDate = getWeekUpOfDate (DateTime. now, DayOfWeek. monday,); endDate = getWeekUpOfDate (DateTime. now, DayOfWeek. sunday ,);

                                                     DateTime beginTime =             DateTime endTime =             DateTime[] times = GetDateTime(beginTime, endTime);              (times.Length >                    TextBox1.Text= times[].ToShortDateString();                    TextBox2.Text = times[].ToShortDateString();                    TextBox3.Text = times[].ToShortDateString();                    TextBox4.Text = times[].ToShortDateString();                    TextBox5.Text = times[].ToShortDateString();                    TextBox6.Text = times[].ToShortDateString();                    TextBox7.Text = times[].ToShortDateString();             }

                                                    List<DateTime> timeList =  List<DateTime>              (; beginTime <= endTime; beginTime = beginTime.AddDays())                 DateTime[] times =                      }