public void BuildGrid() { DateTime previousMonth; try { previousMonth = _currentMonth.AddMonths(-1); } catch { previousMonth = _currentMonth; } var daysInPreviousMonth = DateTime.DaysInMonth(previousMonth.Year, previousMonth.Month); var daysInMonth = DateTime.DaysInMonth(_currentMonth.Year, _currentMonth.Month); weekdayOfFirst = (int)_currentMonth.DayOfWeek; var lead = daysInPreviousMonth - (weekdayOfFirst - 1); // build last month's days for (int i = 1; i <= weekdayOfFirst; i++) { var viewDay = new DateTime(_currentMonth.Year, _currentMonth.Month, i); var dayView = new CalendarDayView { Frame = new RectangleF((i - 1) * 46 - 1, 0, 47, 45), Text = lead.ToString(), Marked = _calendarMonthView.isDayMarker(viewDay) }; AddSubview(dayView); _dayTiles.Add(dayView); lead++; } var position = weekdayOfFirst + 1; var line = 0; // current month for (int i = 1; i <= daysInMonth; i++) { var viewDay = new DateTime(_currentMonth.Year, _currentMonth.Month, i); var dayView = new CalendarDayView { Frame = new RectangleF((position - 1) * 46 - 1, line * 44, 47, 45), Today = (_currentDay.Date == viewDay.Date), Text = i.ToString(), Active = true, Tag = i, Marked = _calendarMonthView.isDayMarker(viewDay), Selected = (SelectedDate.Day == i) }; if (dayView.Selected) { SelectedDayView = dayView; } AddSubview(dayView); _dayTiles.Add(dayView); position++; if (position > 7) { position = 1; line++; } } //next month if (position != 1) { int dayCounter = 1; for (int i = position; i < 8; i++) { var viewDay = new DateTime(_currentMonth.Year, _currentMonth.Month, i); var dayView = new CalendarDayView { Frame = new RectangleF((i - 1) * 46 - 1, line * 44, 47, 45), Text = dayCounter.ToString(), Marked = _calendarMonthView.isDayMarker(viewDay) }; AddSubview(dayView); _dayTiles.Add(dayView); dayCounter++; } } Frame = new RectangleF(Frame.Location, new SizeF(Frame.Width, (line + 1) * 44)); Lines = (position == 1 ? line - 1 : line); if (SelectedDayView != null) { this.BringSubviewToFront(SelectedDayView); } }