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  • C# 根据第几周和季度 获取开始时间和结束时间

     /// <summary>
            /// 根据第几周 获取开始时间和结束时间
            /// </summary>
            /// <param name="week">周数</param>
            /// <param name="month">月份</param>
            /// <returns></returns>
            private Tuple<DateTime, DateTime> GetWeeks(int? week, int? month)
            {
    
                DateTime dt = DateTime.Parse($"{DateTime.Now.Year}-{month.Value}-{DateTime.Now.Day}");
                string[] arrDate0 = new string[6];
                string[] arrDate1 = new string[6];
                //年
                int year = dt.Year;
                //月 
                //当前月第一天
                DateTime weekStart = new DateTime(year, month.Value, 1);
                //该月的最后一天
                DateTime monEnd = weekStart.AddMonths(1).AddDays(-1);
                int i = 1;
                //当前月第一天是星期几
                int dayOfWeek = Convert.ToInt32(weekStart.DayOfWeek.ToString("d"));
                //该月第一周结束日期
                DateTime weekEnd = dayOfWeek == 0 ? weekStart : weekStart.AddDays(7 - dayOfWeek);
                string content = "";
                // content += "第" + i + "周起始日期: " + weekStart.ToShortDateString() + "   结束日期: " + weekEnd.ToShortDateString() + "
    ";
                arrDate0[0] = weekStart.ToString("yyyy-MM-dd 00:00:00");
                arrDate1[0] = weekEnd.ToString("yyyy-MM-dd 23:59:59");
    
                //当日期小于或等于该月的最后一天
    
                while (weekEnd.AddDays(1) <= monEnd)
                {
                    i++;
                    //该周的开始时间
                    weekStart = weekEnd.AddDays(1);
                    //该周结束时间
                    weekEnd = weekEnd.AddDays(7) > monEnd ? monEnd : weekEnd.AddDays(7);
    
                    arrDate0[i - 1] = weekStart.ToString("yyyy-MM-dd 00:00:00");
                    arrDate1[i - 1] = weekEnd.ToString("yyyy-MM-dd 23:59:59");
                    // content += "第" + i + "周起始日期: " + weekStart.ToShortDateString() + "   结束日期: " + weekEnd.ToShortDateString() + "
    ";
                }
    
                content += year + "年" + month + "月共有" + i + "周
    ";
                return Tuple.Create(DateTime.Parse(arrDate0[week.Value]), DateTime.Parse(arrDate1[week.Value]));
            }
    
            /// <summary>
            /// 根据季度 获取开始时间和结束时间
            /// </summary>
            /// <param name="quarter">季度</param>
            /// <returns></returns>
            private Tuple<DateTime, DateTime> GetQurater(string quarter)
            {
                DateTime dt = new DateTime();
                switch (quarter)
                {
                    case "一季度":
                        dt = DateTime.Parse($"{DateTime.Now.Year},1, 01");
                        break;
                    case "二季度":
                        dt = DateTime.Parse($"{DateTime.Now.Year},4, 01");
                        break;
                    case "三季度":
                        dt = DateTime.Parse($"{DateTime.Now.Year},7, 01");
                        break;
                    case "四季度":
                        dt = DateTime.Parse($"{DateTime.Now.Year},10, 01");
                        break;
    
                }
         
                //本季度初 
                string start = dt.AddMonths(0 - (dt.Month - 1) % 3).AddDays(1 - dt.Day).ToString("yyyy-MM-01 00:00:00");  //本季度初    
                //获取本季度的最后一天  
                string end = dt.AddMonths(0 - (dt.Month - 1) % 3).AddDays(1 - dt.Day).AddMonths(3).AddDays(-1).ToString("yyyy-MM-dd 23:59:59"); ;  //
              
              
    
                return Tuple.Create(DateTime.Parse(start), DateTime.Parse(end));
            }
    

      

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  • 原文地址:https://www.cnblogs.com/louby/p/7243751.html
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