获取本周的周一和周日

// 获取本周的周一   
02.        public string GetThisWeekMonday()   
03.        {   
04.            DateTime date = DateTime.Now;   
05.            DateTime first = System.DateTime.Now;   
06.            switch (date.DayOfWeek)   
07.            {   
08.                case System.DayOfWeek.Monday:   
09.                    first = date;   
10.                    break;   
11.                case System.DayOfWeek.Tuesday:   
12.                    first = date.AddDays(-1);   
13.                    break;   
14.                case System.DayOfWeek.Wednesday:   
15.                    first = date.AddDays(-2);   
16.                    break;   
17.                case System.DayOfWeek.Thursday:   
18.                    first = date.AddDays(-3);   
19.                    break;   
20.                case System.DayOfWeek.Friday:   
21.                    first = date.AddDays(-4);   
22.                    break;   
23.                case System.DayOfWeek.Saturday:   
24.                    first = date.AddDays(-5);   
25.                    break;   
26.                case System.DayOfWeek.Sunday:   
27.                    first = date.AddDays(-6);   
28.                    break;   
29.            }   
30.            return first.ToString("yyyy-MM-dd");   
31.        }   
32.  
33.  
34.        // 获取本周的周日   
35.        public string GetThisWeekSunday()   
36.        {   
37.            DateTime date = DateTime.Now;   
38.            DateTime last = System.DateTime.Now;   
39.            switch (date.DayOfWeek)   
40.            {   
41.                case System.DayOfWeek.Monday:   
42.                    last = date.AddDays(6);   
43.                    break;   
44.                case System.DayOfWeek.Tuesday:   
45.                    last = date.AddDays(5);   
46.                    break;   
47.                case System.DayOfWeek.Wednesday:   
48.                    last = date.AddDays(4);   
49.                    break;   
50.                case System.DayOfWeek.Thursday:   
51.                    last = date.AddDays(3);   
52.                    break;   
53.                case System.DayOfWeek.Friday:   
54.                    last = date.AddDays(2);   
55.                    break;   
56.                case System.DayOfWeek.Saturday:   
57.                    last = date.AddDays(1);   
58.                    break;   
59.                case System.DayOfWeek.Sunday:   
60.                    last = date;   
61.                    break;   
62.            }   
63.            return last.ToString("yyyy-MM-dd");   
64.        }