随笔分类 -  c#

linq left join group by count组合统计，防止count()为null结果为1的错误。
摘要：原生sql select car.id,carnum,count(carplan.carid) as timeLen from tab_car as car join tab_inComeType as income on car.inComeTypeId=income.Id and inComeT 阅读全文
posted @ 2023-07-06 14:57 yuanyuanyang 阅读(39) 评论(0) 推荐(0)
c#一些容易忘记的扩展方法
摘要：1.判断预约日期是否是公休日 var isRestDay = queryModel.planDate.DayOfWeek == DayOfWeek.Saturday || queryModel.planDate.DayOfWeek == DayOfWeek.Sunday ? true : false 阅读全文
posted @ 2023-05-31 17:34 yuanyuanyang 阅读(15) 评论(0) 推荐(0)