标签:Console C# AddDays DateTime 获取 日期 WriteLine now Day
static void Main(string[] args) { DateTime now = DateTime.Now; DayOfWeek dayOfWeek = now.DayOfWeek; int daysWeek = dayOfWeek == DayOfWeek.Sunday ? 7 : (int)dayOfWeek; //本周第一天(此结果是周一,如果想要结果是周日的,不用+1) DateTime thisWeekFirstDay = now.AddDays(daysWeek + 1); Console.WriteLine(thisWeekFirstDay); //本月第一天 DateTime thisMonthFirstDay = now.AddDays(now.Day + 1); Console.WriteLine(thisMonthFirstDay); //本年第一天 DateTime thisYearFirstDay = now.AddMonths(now.Month + 1).AddDays(now.Day + 1); Console.WriteLine(thisYearFirstDay); //上周第一天(此结果是周一,如果想要结果是周日的,不用+1) DateTime lastWeekFrstDay = now.AddDays(daysWeek - 7 + 1); Console.WriteLine(lastWeekFrstDay); //上周最后一天 DateTime lastWeekLastdDay = now.AddDays(daysWeek); Console.WriteLine(lastWeekLastdDay); //上月第一天 DateTime lastMonthFirstday = now.AddMonths(-1).AddDays(now.Day + 1); Console.WriteLine(lastWeekLastdDay); //上月最后一天 DateTime lastMonthLastday = now.AddDays(now.Day); Console.WriteLine(lastMonthLastday); //上年第一天 DateTime lastYearFirstDay = now.AddYears(-1).AddMonths(now.Month + 1).AddDays(now.Day + 1); Console.WriteLine(lastYearFirstDay); //上年最后一天 DateTime lastYearLastDay = now.AddMonths(now.Month + 1).AddDays(now.Day); Console.WriteLine(lastYearLastDay); Console.ReadLine(); }
标签:Console,C#,AddDays,DateTime,获取,日期,WriteLine,now,Day 来源: https://www.cnblogs.com/dcy521/p/11676262.html
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