asp.net 取本日，本周，本月，本年的時間段

  asp.net 取本日，本周，本月，本年的時間段

 

   DateTime dt = DateTime.Now;
                    DateTime dtStart = DateTime.Now;
                    DateTime dtEnd = DateTime.Now;

                    switch (searchLog.TimeSlice)
                    {
                        case "0":
                            dtStart = new DateTime(dt.Year, dt.Month, dt.Day, 0, 0, 0);
                            dtEnd = new DateTime(dt.Year, dt.Month, dt.Day, 23, 59, 59);
                            break;
                        case "1":
                            int weeknow = Convert.ToInt32(System.DateTime.Now.DayOfWeek);
                            int daydiff = (-1) * weeknow + 1;
                            dtStart = Convert.ToDateTime(dt.AddDays(daydiff).ToShortDateString());
                            dtEnd = DateTime.Now;
                            break;
                        case "2":
                            dtStart = new DateTime(dt.Year,dt.Month, 1, 0, 0, 0);
                            dtEnd = DateTime.Now;
                            break;
                        case "3":
                            dtStart = new DateTime(dt.Year,1, 1, 0, 0, 0);
                            dtEnd = DateTime.Now;
                            break;
                    }