C# 获取周一、周日

2022-06-11 08:19 1028阅读 0赞

一、按国内计算周一为一周的起点，周日为一周的终点

1.获取周一

//获取周一
    private DateTime getMonday()
    {
        DateTime now = DateTime.Now;
        DateTime temp = new DateTime(now.Year, now.Month, now.Day);
        int count = now.DayOfWeek - DayOfWeek.Monday;
        if (count == -1) count = 6;
    
        return temp.AddDays(-count);
    }

2.获取周日

//获取周天
    private DateTime getSunday()
    {
        DateTime now = DateTime.Now;
        DateTime temp = new DateTime(now.Year, now.Month, now.Day);
        int count = now.DayOfWeek - DayOfWeek.Sunday;
        if (count != 0) count = 7 - count;
    
        return temp.AddDays(count);
    }

二、DayOfWeek定义如下：

//
        // 摘要:
        //     Specifies the day of the week.
        [ComVisible(true)]
        public enum DayOfWeek
        {
            //
            // 摘要:
            //     Indicates Sunday.
            Sunday = 0,
            //
            // 摘要:
            //     Indicates Monday.
            Monday = 1,
            //
            // 摘要:
            //     Indicates Tuesday.
            Tuesday = 2,
            //
            // 摘要:
            //     Indicates Wednesday.
            Wednesday = 3,
            //
            // 摘要:
            //     Indicates Thursday.
            Thursday = 4,
            //
            // 摘要:
            //     Indicates Friday.
            Friday = 5,
            //
            // 摘要:
            //     Indicates Saturday.
            Saturday = 6
        }

[C\# dynamic常用整理][C_ dynamic]

[C\# int类型的强制转换整理][C_ int]

[C\# 扩展方法整理][C_]

[C_ dynamic]: http://blog.csdn.net/u011127019/article/details/76092382
[C_ int]: http://blog.csdn.net/u011127019/article/details/76029953
[C_]: http://blog.csdn.net/u011127019/article/details/54728886