2. DateTime dt = DateTime.Now;
3.
4. dt.ToString();\/\/2005-11-5 13:21:25
5. dt.ToFileTime().ToString();\/\/127756416859912816
6. dt.ToFileTimeUtc().ToString();\/\/127756704859912816
7. dt.ToLocalTime().ToString();\/\/2005-11-5 21:21:25
8. dt.ToLongDateString().ToString();\/\/2005\u5e7411\u67085\u65e5
9. dt.ToLongTimeString().ToString();\/\/13:21:25
10. dt.ToOADate().ToString();\/\/38661.5565508218
11. dt.ToShortDateString().ToString();\/\/2005-11-5
12. dt.ToShortTimeString().ToString();\/\/13:21
13. dt.ToUniversalTime().ToString();\/\/2005-11-5 5:21:25
14. dt.Year.ToString();\/\/2005
15. dt.Date.ToString();\/\/2005-11-5 0:00:00
16. dt.DayOfWeek.ToString();\/\/Saturday
17. dt.DayOfYear.ToString();\/\/309
18. dt.Hour.ToString();\/\/13
19. dt.Millisecond.ToString();\/\/441
20. dt.Minute.ToString();\/\/30
21. dt.Month.ToString();\/\/11
22. dt.Second.ToString();\/\/28
23. dt.Ticks.ToString();\/\/632667942284412864
24. dt.TimeOfDay.ToString();\/\/13:30:28.4412864
25. dt.ToString();\/\/2005-11-5 13:47:04
26. dt.AddYears(1).ToString();\/\/2006-11-5 13:47:04
27. dt.AddDays(1.1).ToString();\/\/2005-11-6 16:11:04
28. dt.AddHours(1.1).ToString();\/\/2005-11-5 14:53:04
29. dt.AddMilliseconds(1.1).ToString();\/\/2005-11-5 13:47:04
30. dt.AddMonths(1).ToString();\/\/2005-12-5 13:47:04
31. dt.AddSeconds(1.1).ToString();\/\/2005-11-5 13:47:05
32. dt.AddMinutes(1.1).ToString();\/\/2005-11-5 13:48:10
33. dt.AddTicks(1000).ToString();\/\/2005-11-5 13:47:04
34. dt.CompareTo(dt).ToString();\/\/0
35. dt.Add(?).ToString();\/\/\u95ee\u53f7\u4e3a\u4e00\u4e2a\u65f6\u95f4\u6bb5
36. dt.Equals(“2005-11-6 16:11:04”).ToString();\/\/False
37. dt.Equals(dt).ToString();\/\/True
38. dt.GetHashCode().ToString();\/\/1474088234
39. dt.GetType().ToString();\/\/System.DateTime
40. dt.GetTypeCode().ToString();\/\/DateTime
41.
42. dt.GetDateTimeFormats(‘s’)[0].ToString();\/\/2005-11-05T14:06:25
43. dt.GetDateTimeFormats(‘t’)[0].ToString();\/\/14:06
44. dt.GetDateTimeFormats(‘y’)[0].ToString();\/\/2005\u5e7411\u6708
45. dt.GetDateTimeFormats(‘D’)[0].ToString();\/\/2005\u5e7411\u67085\u65e5
46. dt.GetDateTimeFormats(‘D’)[1].ToString();\/\/2005 11 05
47. dt.GetDateTimeFormats(‘D’)[2].ToString();\/\/\u661f\u671f\u516d 2005 11 05
48. dt.GetDateTimeFormats(‘D’)[3].ToString();\/\/\u661f\u671f\u516d 2005\u5e7411\u67085\u65e5
49. dt.GetDateTimeFormats(‘M’)[0].ToString();\/\/11\u67085\u65e5
50. dt.GetDateTimeFormats(‘f’)[0].ToString();\/\/2005\u5e7411\u67085\u65e5 14:06
51. dt.GetDateTimeFormats(‘g’)[0].ToString();\/\/2005-11-5 14:06
52. dt.GetDateTimeFormats(‘r’)[0].ToString();\/\/Sat, 05 Nov 2005 14:06:25 GMT
53.
54. string.Format(“{0:d}”,dt);\/\/2005-11-5
55. string.Format(“{0:D}”,dt);\/\/2005\u5e7411\u67085\u65e5
56. string.Format(“{0:f}”,dt);\/\/2005\u5e7411\u67085\u65e5 14:23
57. string.Format(“{0:F}”,dt);\/\/2005\u5e7411\u67085\u65e5 14:23:23
58. string.Format(“{0:g}”,dt);\/\/2005-11-5 14:23
59. string.Format(“{0:G}”,dt);\/\/2005-11-5 14:23:23
60. string.Format(“{0:M}”,dt);\/\/11\u67085\u65e5
61. string.Format(“{0:R}”,dt);\/\/Sat, 05 Nov 2005 14:23:23 GMT
62. string.Format(“{0:s}”,dt);\/\/2005-11-05T14:23:23
63. string.Format(“{0:t}”,dt);\/\/14:23
64. string.Format(“{0:T}”,dt);\/\/14:23:23
65. string.Format(“{0:u}”,dt);\/\/2005-11-05 14:23:23Z
66. string.Format(“{0:U}”,dt);\/\/2005\u5e7411\u67085\u65e5 6:23:23
67. string.Format(“{0:Y}”,dt);\/\/2005\u5e7411\u6708
68. string.Format(“{0}”,dt);\/\/2005-11-5 14:23:23
69. string.Format(“{0:yyyyMMddHHmmssffff}”,dt);
70.
71.
72. \/\/ \u8ba1\u7b972\u4e2a\u65e5\u671f\u4e4b\u95f4\u7684\u5929\u6570\u5dee
73. DateTime dt1 = Convert.DateTime(“2007-8-1”);
74. DateTime dt2 = Convert.DateTime(“2007-8-15”);
75. TimeSpan span = dt2.Subtract(dt1);
76. int dayDiff = span.Days + 1;
77.
78. \/\/ \u8ba1\u7b97\u67d0\u5e74\u67d0\u6708\u7684\u5929\u6570
79. int days = DateTime.DaysInMonth(2007, 8);
80. days = 31;
81.
82. \/\/ \u7ed9\u65e5\u671f\u589e\u52a0\u4e00\u5929\u3001\u51cf\u5c11\u4e00\u5929
83. DateTime dt =DateTime.Now;
84. dt.AddDays(1); \/\/\u589e\u52a0\u4e00\u5929
85. dt.AddDays(-1);\/\/\u51cf\u5c11\u4e00\u5929<\/p>\n
\u65e5\u671f\u683c\u5f0f\u6a21\u5f0f \u8bf4\u660e
d \u6708\u4e2d\u7684\u67d0\u4e00\u5929\u3002\u4e00\u4f4d\u6570\u7684\u65e5\u671f\u6ca1\u6709\u524d\u5bfc\u96f6\u3002
dd \u6708\u4e2d\u7684\u67d0\u4e00\u5929\u3002\u4e00\u4f4d\u6570\u7684\u65e5\u671f\u6709\u4e00\u4e2a\u524d\u5bfc\u96f6\u3002
ddd \u5468\u4e2d\u67d0\u5929\u7684\u7f29\u5199\u540d\u79f0\uff0c\u5728 AbbreviatedDayNames \u4e2d\u5b9a\u4e49\u3002
dddd \u5468\u4e2d\u67d0\u5929\u7684\u5b8c\u6574\u540d\u79f0\uff0c\u5728 DayNames \u4e2d\u5b9a\u4e49\u3002
M \u6708\u4efd\u6570\u5b57\u3002\u4e00\u4f4d\u6570\u7684\u6708\u4efd\u6ca1\u6709\u524d\u5bfc\u96f6\u3002
MM \u6708\u4efd\u6570\u5b57\u3002\u4e00\u4f4d\u6570\u7684\u6708\u4efd\u6709\u4e00\u4e2a\u524d\u5bfc\u96f6\u3002
MMM \u6708\u4efd\u7684\u7f29\u5199\u540d\u79f0\uff0c\u5728 AbbreviatedMonthNames \u4e2d\u5b9a\u4e49\u3002
MMMM \u6708\u4efd\u7684\u5b8c\u6574\u540d\u79f0\uff0c\u5728 MonthNames \u4e2d\u5b9a\u4e49\u3002
y \u4e0d\u5305\u542b\u7eaa\u5143\u7684\u5e74\u4efd\u3002\u5982\u679c\u4e0d\u5305\u542b\u7eaa\u5143\u7684\u5e74\u4efd\u5c0f\u4e8e 10\uff0c\u5219\u663e\u793a\u4e0d\u5177\u6709\u524d\u5bfc\u96f6\u7684\u5e74\u4efd\u3002
yy \u4e0d\u5305\u542b\u7eaa\u5143\u7684\u5e74\u4efd\u3002\u5982\u679c\u4e0d\u5305\u542b\u7eaa\u5143\u7684\u5e74\u4efd\u5c0f\u4e8e 10\uff0c\u5219\u663e\u793a\u5177\u6709\u524d\u5bfc\u96f6\u7684\u5e74\u4efd\u3002
yyyy \u5305\u62ec\u7eaa\u5143\u7684\u56db\u4f4d\u6570\u7684\u5e74\u4efd\u3002
gg \u65f6\u671f\u6216\u7eaa\u5143\u3002\u5982\u679c\u8981\u8bbe\u7f6e\u683c\u5f0f\u7684\u65e5\u671f\u4e0d\u5177\u6709\u5173\u8054\u7684\u65f6\u671f\u6216\u7eaa\u5143\u5b57\u7b26\u4e32\uff0c\u5219\u5ffd\u7565\u8be5\u6a21\u5f0f\u3002
h 12 \u5c0f\u65f6\u5236\u7684\u5c0f\u65f6\u3002\u4e00\u4f4d\u6570\u7684\u5c0f\u65f6\u6570\u6ca1\u6709\u524d\u5bfc\u96f6\u3002
hh 12 \u5c0f\u65f6\u5236\u7684\u5c0f\u65f6\u3002\u4e00\u4f4d\u6570\u7684\u5c0f\u65f6\u6570\u6709\u524d\u5bfc\u96f6\u3002
H 24 \u5c0f\u65f6\u5236\u7684\u5c0f\u65f6\u3002\u4e00\u4f4d\u6570\u7684\u5c0f\u65f6\u6570\u6ca1\u6709\u524d\u5bfc\u96f6\u3002
HH 24 \u5c0f\u65f6\u5236\u7684\u5c0f\u65f6\u3002\u4e00\u4f4d\u6570\u7684\u5c0f\u65f6\u6570\u6709\u524d\u5bfc\u96f6\u3002
m \u5206\u949f\u3002\u4e00\u4f4d\u6570\u7684\u5206\u949f\u6570\u6ca1\u6709\u524d\u5bfc\u96f6\u3002
mm \u5206\u949f\u3002\u4e00\u4f4d\u6570\u7684\u5206\u949f\u6570\u6709\u4e00\u4e2a\u524d\u5bfc\u96f6\u3002
s \u79d2\u3002\u4e00\u4f4d\u6570\u7684\u79d2\u6570\u6ca1\u6709\u524d\u5bfc\u96f6\u3002
ss \u79d2\u3002\u4e00\u4f4d\u6570\u7684\u79d2\u6570\u6709\u4e00\u4e2a\u524d\u5bfc\u96f6\u3002
f \u79d2\u7684\u5c0f\u6570\u7cbe\u5ea6\u4e3a\u4e00\u4f4d\u3002\u5176\u4f59\u6570\u5b57\u88ab\u622a\u65ad\u3002
ff \u79d2\u7684\u5c0f\u6570\u7cbe\u5ea6\u4e3a\u4e24\u4f4d\u3002\u5176\u4f59\u6570\u5b57\u88ab\u622a\u65ad\u3002
fff \u79d2\u7684\u5c0f\u6570\u7cbe\u5ea6\u4e3a\u4e09\u4f4d\u3002\u5176\u4f59\u6570\u5b57\u88ab\u622a\u65ad\u3002
ffff \u79d2\u7684\u5c0f\u6570\u7cbe\u5ea6\u4e3a\u56db\u4f4d\u3002\u5176\u4f59\u6570\u5b57\u88ab\u622a\u65ad\u3002
fffff \u79d2\u7684\u5c0f\u6570\u7cbe\u5ea6\u4e3a\u4e94\u4f4d\u3002\u5176\u4f59\u6570\u5b57\u88ab\u622a\u65ad\u3002
ffffff \u79d2\u7684\u5c0f\u6570\u7cbe\u5ea6\u4e3a\u516d\u4f4d\u3002\u5176\u4f59\u6570\u5b57\u88ab\u622a\u65ad\u3002
fffffff \u79d2\u7684\u5c0f\u6570\u7cbe\u5ea6\u4e3a\u4e03\u4f4d\u3002\u5176\u4f59\u6570\u5b57\u88ab\u622a\u65ad\u3002
t \u5728 AMDesignator \u6216 PMDesignator \u4e2d\u5b9a\u4e49\u7684 AM\/PM \u6307\u793a\u9879\u7684\u7b2c\u4e00\u4e2a\u5b57\u7b26\uff08\u5982\u679c\u5b58\u5728\uff09\u3002
tt \u5728 AMDesignator \u6216 PMDesignator \u4e2d\u5b9a\u4e49\u7684 AM\/PM \u6307\u793a\u9879\uff08\u5982\u679c\u5b58\u5728\uff09\u3002
z \u65f6\u533a\u504f\u79fb\u91cf\uff08\u201c+\u201d\u6216\u201c-\u201d\u540e\u9762\u4ec5\u8ddf\u5c0f\u65f6\uff09\u3002\u4e00\u4f4d\u6570\u7684\u5c0f\u65f6\u6570\u6ca1\u6709\u524d\u5bfc\u96f6\u3002\u4f8b\u5982\uff0c\u592a\u5e73\u6d0b\u6807\u51c6\u65f6\u95f4\u662f\u201c-8\u201d\u3002
zz \u65f6\u533a\u504f\u79fb\u91cf\uff08\u201c+\u201d\u6216\u201c-\u201d\u540e\u9762\u4ec5\u8ddf\u5c0f\u65f6\uff09\u3002\u4e00\u4f4d\u6570\u7684\u5c0f\u65f6\u6570\u6709\u524d\u5bfc\u96f6\u3002\u4f8b\u5982\uff0c\u592a\u5e73\u6d0b\u6807\u51c6\u65f6\u95f4\u662f\u201c-08\u201d\u3002
zzz \u5b8c\u6574\u65f6\u533a\u504f\u79fb\u91cf\uff08\u201c+\u201d\u6216\u201c-\u201d\u540e\u9762\u8ddf\u6709\u5c0f\u65f6\u548c\u5206\u949f\uff09\u3002\u4e00\u4f4d\u6570\u7684\u5c0f\u65f6\u6570\u548c\u5206\u949f\u6570\u6709\u524d\u5bfc\u96f6\u3002\u4f8b\u5982\uff0c\u592a\u5e73\u6d0b\u6807\u51c6\u65f6\u95f4\u662f\u201c-08:00\u201d\u3002
: \u5728 TimeSeparator \u4e2d\u5b9a\u4e49\u7684\u9ed8\u8ba4\u65f6\u95f4\u5206\u9694\u7b26\u3002
\/ \u5728 DateSeparator \u4e2d\u5b9a\u4e49\u7684\u9ed8\u8ba4\u65e5\u671f\u5206\u9694\u7b26\u3002
% c \u5176\u4e2d c \u662f\u683c\u5f0f\u6a21\u5f0f\uff08\u5982\u679c\u5355\u72ec\u4f7f\u7528\uff09\u3002\u5982\u679c\u683c\u5f0f\u6a21\u5f0f\u4e0e\u539f\u4e49\u5b57\u7b26\u6216\u5176\u4ed6\u683c\u5f0f\u6a21\u5f0f\u5408\u5e76\uff0c\u5219\u53ef\u4ee5\u7701\u7565\u201c%\u201d\u5b57\u7b26\u3002
\ c \u5176\u4e2d c \u662f\u4efb\u610f\u5b57\u7b26\u3002\u7167\u539f\u4e49\u663e\u793a\u5b57\u7b26\u3002\u82e5\u8981\u663e\u793a\u53cd\u659c\u6760\u5b57\u7b26\uff0c\u8bf7\u4f7f\u7528\u201c\\\u201d\u3002<\/p>\n
\u53ea\u6709\u4e0a\u9762\u7b2c\u4e8c\u4e2a\u8868\u4e2d\u5217\u51fa\u7684\u683c\u5f0f\u6a21\u5f0f\u624d\u80fd\u7528\u4e8e\u521b\u5efa\u81ea\u5b9a\u4e49\u6a21\u5f0f\uff1b\u5728\u7b2c\u4e00\u4e2a\u8868\u4e2d\u5217\u51fa\u7684\u6807\u51c6\u683c\u5f0f\u5b57\u7b26\u4e0d\u80fd\u7528\u4e8e\u521b\u5efa\u81ea\u5b9a\u4e49\u6a21\u5f0f\u3002
\u81ea\u5b9a\u4e49\u6a21\u5f0f\u7684\u957f\u5ea6\u81f3\u5c11\u4e3a\u4e24\u4e2a\u5b57\u7b26\uff1b\u4f8b\u5982\uff0c<\/p>\n
1. DateTime.ToString( “d”); \/\/ \u8fd4\u56de DateTime \u503c\uff1b\u201cd\u201d\u662f\u6807\u51c6\u77ed\u65e5\u671f\u6a21\u5f0f\u3002
2. DateTime.ToString( “%d”); \/\/ \u8fd4\u56de\u6708\u4e2d\u7684\u67d0\u5929\uff1b\u201c%d\u201d\u662f\u81ea\u5b9a\u4e49\u6a21\u5f0f\u3002
3. DateTime.ToString( “d “); \/\/ \u8fd4\u56de\u540e\u9762\u8ddf\u6709\u4e00\u4e2a\u7a7a\u767d\u5b57\u7b26\u7684\u6708\u4e2d\u7684\u67d0\u5929\uff1b\u201cd\u201d\u662f\u81ea\u5b9a\u4e49\u6a21\u5f0f\u3002<\/p>\n
C# code\u5e38\u7528\u65e5\u671f\u5904\u7406
\/\/\u4ee5\u4e0b\u7684\u6beb\u79d2\u90fd\u91c7\u7528\u6700\u5927997\uff0c\u800c\u4e0d\u662f999 \u56e0\u4e3aSQL SERVER\u7684\u7cbe\u5ea6\u4e3a3\u6beb\u79d2
\/\/\u672c\u6708\u7684\u5929\u6570
int daysInMonth = DateTime.DaysInMonth(DateTime.Now.Year, DateTime.Now.Month);<\/p>\n
\/\/\u672c\u5e74\u7684\u5929\u6570 \u662f\u5426\u662f\u95f0\u5e74
int daysInYear = DateTime.IsLeapYear(DateTime.Now.Year) ? 366 : 365;<\/p>\n
\/\/\u672c\u6708\u7b2c\u4e00\u5929
DateTime firstDayInMonth = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1);
\/\/\u672c\u6708\u7684\u6700\u540e\u4e00\u5929 \u672c\u67081\u53f7\u52a0\u4e00\u4e2a\u6708\u5f97\u4e0b\u67081\u53f7\uff0c\u518d\u526a\u6389\u4e00\u5929\u5c31\u662f\u672c\u6708\u6700\u540e\u4e00\u5929
DateTime lastDayInMonth = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1).AddMonths(1).AddDays(-1);
\/\/\u672c\u6708\u6700\u540e\u4e00\u5929\u7684\u5348\u591c
DateTime lastDayInMonth2 = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1).AddMonths(1).AddMilliseconds(-3);<\/p>\n
\/\/\u672c\u5e74\u7b2c\u4e00\u5929
DateTime firstDayInYear = new DateTime(DateTime.Now.Year, 1, 1);<\/p>\n
\/\/\u672c\u5e74\u6700\u540e\u4e00\u5929
DateTime lastDayInYear = new DateTime(DateTime.Now.Year, 12, 31);
\/\/\u672c\u5e74\u6700\u540e\u4e00\u5929\u7684\u5348\u591c
DateTime lastDayInYear2 = new DateTime(DateTime.Now.Year, 12, 31, 23, 59, 59, 997);<\/p>\n
\/\/\u5f97\u5230\u661f\u671f\u51e0 \u661f\u671f\u5929\u4e3a7
int dayOfWeek = Convert.ToInt32(DateTime.Now.DayOfWeek) < 1 ? 7 : Convert.ToInt32(DateTime.Now.DayOfWeek);
\/\/\u672c\u5468\u4e00
DateTime monday = new DateTime(DateTime.Now.Year,DateTime.Now.Month,DateTime.Now.Day).AddDays(1 – dayOfWeek);
\/\/\u672c\u5468 \u661f\u671f\u5929
DateTime sunday = monday.AddDays(6);
\/\/\u672c\u5468 \u661f\u671f\u5929\u7684\u5348\u591c
DateTime sunday2 = monday.AddDays(7).AddMilliseconds(-3);<\/p>\n
\/\/\u672c\u5b63\u5ea6\u7b2c\u4e00\u5929
DateTime firsyDayInQuarter = new DateTime(DateTime.Now.Year, DateTime.Now.Month – (DateTime.Now.Month – 1) % 3, 1);
\/\/\u672c\u5b63\u5ea6\u6700\u540e\u4e00\u5929
DateTime lastDayInQuarter = firsyDayInQuarter.AddMonths(3).AddDays(-1);
\/\/\u672c\u5b63\u5ea6\u6700\u540e\u4e00\u5929\u7684\u5348\u591c
DateTime lastDayInQuarter2 = firsyDayInQuarter.AddMonths(3).AddMilliseconds(-3);
string datetime = “10-Jul-09”;
string newdatetime = DateTime.Parse(datetime, new System.Globalization.CultureInfo(“de-de”)).ToString(“yyyyMMdd”);<\/p>\n","protected":false},"excerpt":{"rendered":"
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