首页 > 代码库 > C#得到某月最后一天晚上23:59:59和某月第一天00:00:00

C#得到某月最后一天晚上23:59:59和某月第一天00:00:00

项目需求:

       某学校订单截止操作时间的上一个月最后一天晚上23:59:59 为止所有支付的订单统计;

代码:


        /// <summary>        /// 通过学校和截止时间得到订单        /// </summary>        /// <param name="pageIndex">页个数</param>        /// <param name="pageSize">页面积</param>        /// <param name="schoolId">学校ID</param>        /// <param name="orderSettlementEndTime">截止时间</param>        /// <returns></returns>        public PagedList<Order> GetOrderBySchoolAndEndTime(int pageIndex,int pageSize,Guid? schoolId, DateTime? orderSettlementEndTime)        {            var query = this.Table;            if (schoolId.HasValue)            {                query = query.Where(x => x.SchoolId == schoolId);            }            if (orderSettlementEndTime.HasValue)            {                //本月的最后一天                var endMonth = DateTime.Parse(                    orderSettlementEndTime.Value.AddDays(1 - orderSettlementEndTime.Value.Day)                        .AddMonths(1)                        .AddDays(-1)                        .ToString());                //上月的最后一天                var startMonth =                    DateTime.Parse(                        orderSettlementEndTime.Value.AddDays(1 - orderSettlementEndTime.Value.Day)                        .AddSeconds(-1).ToString());                query = query.Where(x => x.CreateTime >= startMonth&&x.CreateTime<endMonth);            }            return query.Where(x => x.PaymentState == PaymentState.支付完成)                .OrderBy(x=>x.Id)                .ToPagedList(pageIndex,pageSize);        }

图片:

技术分享

 

技术分享

 

       利用DateTime.Parse();将string类型的时间转换为datetime类型,我们看一下后面的代码,是将时间手动的设置为我们需要的时间。

                DateTime today12hours = DateTime.Parse(DateTime.Now.ToString("yyyy-MM-dd 12:00:00"));

这样我们设置了值。

封装取时间的方法

        /// <summary>        /// 某月的最后一天        /// </summary>        /// <param name="datetime"></param>        /// <returns></returns>        public DateTime FirstDayOfMonth(DateTime datetime)        {            return datetime.AddDays(1 - datetime.Day).AddMonths(1).AddDays(-1);        }        /// <summary>        /// 前一月的最后一天        /// </summary>        /// <param name="datetime"></param>        /// <returns></returns>        public DateTime LastDayOfMonth(DateTime datetime)        {            return datetime.AddDays(1 - datetime.Day).AddSeconds(-1);        }        /// <summary>        /// 某月的第一天        /// </summary>        /// <param name="datetime"></param>        /// <returns></returns>        public DateTime FirstDayOfMonthMethod(DateTime datetime)        {            return datetime.AddDays(1 - datetime.Day);        }        /// <summary>        /// 上一月的第一天        /// </summary>        /// <param name="datetime"></param>        /// <returns></returns>        public DateTime FirstDayOfUpMouth(DateTime datetime)        {            return datetime.AddDays(1 - datetime.Day).AddMonths(-1);        }        /// <summary>        /// 取得上个月的最后一天        /// </summary>        /// <param name="datetime"></param>        /// <returns></returns>        public DateTime LastDayOfOnMouth(DateTime datetime)        {            return datetime.AddDays(1 - datetime.Day).AddDays(-1);        }

C#得到某月最后一天晚上23:59:59和某月第一天00:00:00