如何可视化各种DateTime格式的显示方式？
我希望能够快速参考各种DateTime格式的显示方式，而不是开始编辑，编译，gawk和recurse的繁重过程，直到满意为止。
这显示了当前文化的所有格式：
StringBuilder sb = new StringBuilder(); foreach (string dateTimePattern in DateTimeFormatInfo.CurrentInfo.GetAllDateTimePatterns()) { sb.AppendFormat("{0} = {1}\r\n", dateTimePattern, DateTime.Now.ToString(dateTimePattern)); } StringBuilder内容之后：
M/d/yyyy = 7/18/2012 M/d/yy = 7/18/12 MM/dd/yy = 07/18/12 MM/dd/yyyy = 07/18/2012 yy/MM/dd = 12/07/18 yyyy-MM-dd = 2012-07-18 dd-MMM-yy = 18-Jul-12 dddd, MMMM dd, yyyy = Wednesday, July 18, 2012 MMMM dd, yyyy = July 18, 2012 dddd, dd MMMM, yyyy = Wednesday, 18 July, 2012 dd MMMM, yyyy = 18 July, 2012 dddd, MMMM dd, yyyy h:mm tt = Wednesday, July 18, 2012 4:25 PM dddd, MMMM dd, yyyy hh:mm tt = Wednesday, July 18, 2012 04:25 PM dddd, MMMM dd, yyyy H:mm = Wednesday, July 18, 2012 16:25 dddd, MMMM dd, yyyy HH:mm = Wednesday, July 18, 2012 16:25 MMMM dd, yyyy h:mm tt = July 18, 2012 4:25 PM MMMM dd, yyyy hh:mm tt = July 18, 2012 04:25 PM MMMM dd, yyyy H:mm = July 18, 2012 16:25 MMMM dd, yyyy HH:mm = July 18, 2012 16:25 dddd, dd MMMM, yyyy h:mm tt = Wednesday, 18 July, 2012 4:25 PM dddd, dd MMMM, yyyy hh:mm tt = Wednesday, 18 July, 2012 04:25 PM dddd, dd MMMM, yyyy H:mm = Wednesday, 18 July, 2012 16:25 dddd, dd MMMM, yyyy HH:mm = Wednesday, 18 July, 2012 16:25 dd MMMM, yyyy h:mm tt = 18 July, 2012 4:25 PM dd MMMM, yyyy hh:mm tt = 18 July, 2012 04:25 PM dd MMMM, yyyy H:mm = 18 July, 2012 16:25 dd MMMM, yyyy HH:mm = 18 July, 2012 16:25 dddd, MMMM dd, yyyy h:mm:ss tt = Wednesday, July 18, 2012 4:25:17 PM dddd, MMMM dd, yyyy hh:mm:ss tt = Wednesday, July 18, 2012 04:25:17 PM dddd, MMMM dd, yyyy H:mm:ss = Wednesday, July 18, 2012 16:25:17 dddd, MMMM dd, yyyy HH:mm:ss = Wednesday, July 18, 2012 16:25:17 MMMM dd, yyyy h:mm:ss tt = July 18, 2012 4:25:17 PM MMMM dd, yyyy hh:mm:ss tt = July 18, 2012 04:25:17 PM MMMM dd, yyyy H:mm:ss = July 18, 2012 16:25:17 MMMM dd, yyyy HH:mm:ss = July 18, 2012 16:25:17 dddd, dd MMMM, yyyy h:mm:ss tt = Wednesday, 18 July, 2012 4:25:17 PM dddd, dd MMMM, yyyy hh:mm:ss tt = Wednesday, 18 July, 2012 04:25:17 PM dddd, dd MMMM, yyyy H:mm:ss = Wednesday, 18 July, 2012 16:25:17 dddd, dd MMMM, yyyy HH:mm:ss = Wednesday, 18 July, 2012 16:25:17 dd MMMM, yyyy h:mm:ss tt = 18 July, 2012 4:25:17 PM dd MMMM, yyyy hh:mm:ss tt = 18 July, 2012 04:25:17 PM dd MMMM, yyyy H:mm:ss = 18 July, 2012 16:25:17 dd MMMM, yyyy HH:mm:ss = 18 July, 2012 16:25:17 M/d/yyyy h:mm tt = 7/18/2012 4:25 PM M/d/yyyy hh:mm tt = 7/18/2012 04:25 PM M/d/yyyy H:mm = 7/18/2012 16:25 M/d/yyyy HH:mm = 7/18/2012 16:25 M/d/yy h:mm tt = 7/18/12 4:25 PM M/d/yy hh:mm tt = 7/18/12 04:25 PM M/d/yy H:mm = 7/18/12 16:25 M/d/yy HH:mm = 7/18/12 16:25 MM/dd/yy h:mm tt = 07/18/12 4:25 PM MM/dd/yy hh:mm tt = 07/18/12 04:25 PM MM/dd/yy H:mm = 07/18/12 16:25 MM/dd/yy HH:mm = 07/18/12 16:25 MM/dd/yyyy h:mm tt = 07/18/2012 4:25 PM MM/dd/yyyy hh:mm tt = 07/18/2012 04:25 PM MM/dd/yyyy H:mm = 07/18/2012 16:25 MM/dd/yyyy HH:mm = 07/18/2012 16:25 yy/MM/dd h:mm tt = 12/07/18 4:25 PM yy/MM/dd hh:mm tt = 12/07/18 04:25 PM yy/MM/dd H:mm = 12/07/18 16:25 yy/MM/dd HH:mm = 12/07/18 16:25 yyyy-MM-dd h:mm tt = 2012-07-18 4:25 PM yyyy-MM-dd hh:mm tt = 2012-07-18 04:25 PM yyyy-MM-dd H:mm = 2012-07-18 16:25 yyyy-MM-dd HH:mm = 2012-07-18 16:25 dd-MMM-yy h:mm tt = 18-Jul-12 4:25 PM dd-MMM-yy hh:mm tt = 18-Jul-12 04:25 PM dd-MMM-yy H:mm = 18-Jul-12 16:25 dd-MMM-yy HH:mm = 18-Jul-12 16:25 M/d/yyyy h:mm:ss tt = 7/18/2012 4:25:17 PM M/d/yyyy hh:mm:ss tt = 7/18/2012 04:25:17 PM M/d/yyyy H:mm:ss = 7/18/2012 16:25:17 M/d/yyyy HH:mm:ss = 7/18/2012 16:25:17 M/d/yy h:mm:ss tt = 7/18/12 4:25:17 PM M/d/yy hh:mm:ss tt = 7/18/12 04:25:17 PM M/d/yy H:mm:ss = 7/18/12 16:25:17 M/d/yy HH:mm:ss = 7/18/12 16:25:17 MM/dd/yy h:mm:ss tt = 07/18/12 4:25:17 PM MM/dd/yy hh:mm:ss tt = 07/18/12 04:25:17 PM MM/dd/yy H:mm:ss = 07/18/12 16:25:17 MM/dd/yy HH:mm:ss = 07/18/12 16:25:17 MM/dd/yyyy h:mm:ss tt = 07/18/2012 4:25:17 PM MM/dd/yyyy hh:mm:ss tt = 07/18/2012 04:25:17 PM MM/dd/yyyy H:mm:ss = 07/18/2012 16:25:17 MM/dd/yyyy HH:mm:ss = 07/18/2012 16:25:17 yy/MM/dd h:mm:ss tt = 12/07/18 4:25:17 PM yy/MM/dd hh:mm:ss tt = 12/07/18 04:25:17 PM yy/MM/dd H:mm:ss = 12/07/18 16:25:17 yy/MM/dd HH:mm:ss = 12/07/18 16:25:17 yyyy-MM-dd h:mm:ss tt = 2012-07-18 4:25:17 PM yyyy-MM-dd hh:mm:ss tt = 2012-07-18 04:25:17 PM yyyy-MM-dd H:mm:ss = 2012-07-18 16:25:17 yyyy-MM-dd HH:mm:ss = 2012-07-18 16:25:17 dd-MMM-yy h:mm:ss tt = 18-Jul-12 4:25:17 PM dd-MMM-yy hh:mm:ss tt = 18-Jul-12 04:25:17 PM dd-MMM-yy H:mm:ss = 18-Jul-12 16:25:17 dd-MMM-yy HH:mm:ss = 18-Jul-12 16:25:17 MMMM dd = July 18 MMMM dd = July 18 yyyy'-'MM'-'dd'T'HH':'mm':'ss.fffffffK = 2012-07-18T16:25:17.0961142-07:00 yyyy'-'MM'-'dd'T'HH':'mm':'ss.fffffffK = 2012-07-18T16:25:17.0961142-07:00 ddd, dd MMM yyyy HH':'mm':'ss 'GMT' = Wed, 18 Jul 2012 16:25:17 GMT ddd, dd MMM yyyy HH':'mm':'ss 'GMT' = Wed, 18 Jul 2012 16:25:17 GMT yyyy'-'MM'-'dd'T'HH':'mm':'ss = 2012-07-18T16:25:17 h:mm tt = 4:25 PM hh:mm tt = 04:25 PM H:mm = 16:25 HH:mm = 16:25 h:mm:ss tt = 4:25:17 PM hh:mm:ss tt = 04:25:17 PM H:mm:ss = 16:25:17 HH:mm:ss = 16:25:17 yyyy'-'MM'-'dd HH':'mm':'ss'Z' = 2012-07-18 16:25:17Z dddd, MMMM dd, yyyy h:mm:ss tt = Wednesday, July 18, 2012 4:25:17 PM dddd, MMMM dd, yyyy hh:mm:ss tt = Wednesday, July 18, 2012 04:25:17 PM dddd, MMMM dd, yyyy H:mm:ss = Wednesday, July 18, 2012 16:25:17 dddd, MMMM dd, yyyy HH:mm:ss = Wednesday, July 18, 2012 16:25:17 MMMM dd, yyyy h:mm:ss tt = July 18, 2012 4:25:17 PM MMMM dd, yyyy hh:mm:ss tt = July 18, 2012 04:25:17 PM MMMM dd, yyyy H:mm:ss = July 18, 2012 16:25:17 MMMM dd, yyyy HH:mm:ss = July 18, 2012 16:25:17 dddd, dd MMMM, yyyy h:mm:ss tt = Wednesday, 18 July, 2012 4:25:17 PM dddd, dd MMMM, yyyy hh:mm:ss tt = Wednesday, 18 July, 2012 04:25:17 PM dddd, dd MMMM, yyyy H:mm:ss = Wednesday, 18 July, 2012 16:25:17 dddd, dd MMMM, yyyy HH:mm:ss = Wednesday, 18 July, 2012 16:25:17 dd MMMM, yyyy h:mm:ss tt = 18 July, 2012 4:25:17 PM dd MMMM, yyyy hh:mm:ss tt = 18 July, 2012 04:25:17 PM dd MMMM, yyyy H:mm:ss = 18 July, 2012 16:25:17 dd MMMM, yyyy HH:mm:ss = 18 July, 2012 16:25:17 MMMM, yyyy = July, 2012 MMMM, yyyy = July, 2012
我不确定为什么会重复几种模式。
自定义日期时间格式
有以下自定义格式说明符y（年），M（月），d（日），h（小时12），H（小时24），m（分钟），s（秒），f（第二分数），F （第二部分，尾随零被修剪），t（PM或AM）和z（时区）。
以下示例演示了如何将格式说明符重写为输出。 [C＃]
// create date time 2008-03-09 16:05:07.123 DateTime dt = new DateTime(2008, 3, 9, 16, 5, 7, 123); String.Format("{0:y yy yyy yyyy}", dt); // "8 08 008 2008" year String.Format("{0:M MM MMM MMMM}", dt); // "3 03 Mar March" month String.Format("{0:d dd ddd dddd}", dt); // "9 09 Sun Sunday" day String.Format("{0:h hh H HH}", dt); // "4 04 16 16" hour 12/24 String.Format("{0:m mm}", dt); // "5 05" minute String.Format("{0:s ss}", dt); // "7 07" second String.Format("{0:f ff fff ffff}", dt); // "1 12 123 1230" sec.fraction String.Format("{0:F FF FFF FFFF}", dt); // "1 12 123 123" without zeroes String.Format("{0:t tt}", dt); // "P PM" AM or PM String.Format("{0:z zz zzz}", dt); // "-6 -06 -06:00" time zone
您还可以使用日期分隔符/（斜杠）和时间分隔符:(冒号）。 这些字符将被重写为当前DateTimeFormatInfo.DateSeparator和DateTimeFormatInfo.TimeSeparator中定义的字符。
// date separator in german culture is "." (so "/" changes to ".") String.Format("{0:d/M/yyyy HH:mm:ss}", dt); // "9/3/2008 16:05:07" - english (en-US) String.Format("{0:d/M/yyyy HH:mm:ss}", dt); // "9.3.2008 16:05:07" - german (de-DE)
以下是自定义日期和时间格式的一些示例：
// month/day numbers without/with leading zeroes String.Format("{0:M/d/yyyy}", dt); // "3/9/2008" String.Format("{0:MM/dd/yyyy}", dt); // "03/09/2008" // day/month names String.Format("{0:ddd, MMM d, yyyy}", dt); // "Sun, Mar 9, 2008" String.Format("{0:dddd, MMMM d, yyyy}", dt); // "Sunday, March 9, 2008" // two/four digit year String.Format("{0:MM/dd/yy}", dt); // "03/09/08" String.Format("{0:MM/dd/yyyy}", dt); // "03/09/2008"
标准日期时间格式
在DateTimeFormatInfo中，为当前文化定义了标准模式。 例如，属性ShortTimePattern是字符串，其包含用于en-US文化的值h：mm tt和用于de-DE文化的值HH：mm。
以下示例显示了String.Format方法中标准格式说明符的使用以及结果输出。
String.Format("{0:t}", dt); //"4:05 PM" ShortTime String.Format("{0:d}", dt); //"3/9/2008" ShortDate String.Format("{0:T}", dt); //"4:05:07 PM" LongTime String.Format("{0:D}", dt); //"Sunday, March 09, 2008" LongDate String.Format("{0:f}", dt); //"Sunday, March 09, 2008 4:05 PM" LongDate+ShortTime String.Format("{0:F}", dt); //"Sunday, March 09, 2008 4:05:07 PM" FullDateTime String.Format("{0:g}", dt); //"3/9/2008 4:05 PM" ShortDate+ShortTime String.Format("{0:G}", dt); //"3/9/2008 4:05:07 PM" ShortDate+LongTime String.Format("{0:m}", dt); //"March 09" MonthDay String.Format("{0:y}", dt); //"March, 2008" YearMonth String.Format("{0:r}", dt); //"Sun, 09 Mar 2008 16:05:07 GMT" RFC1123 String.Format("{0:s}", dt); //"2008-03-09T16:05:07" SortableDateTime String.Format("{0:u}", dt); // "2008-03-09 16:05:07Z" UniversalSortableDateTime
DateTime.Now.ToString("D") displays "Wednesday, July 18, 2012" DateTime.Now.ToString("d") displays "7/18/2012" DateTime.Now.ToString("F") displays "Wednesday, July 18, 2012 3:57:13 PM" DateTime.Now.ToString("f") displays "Wednesday, July 18, 2012 3:57 PM" DateTime.Now.ToString("G") displays "7/18/2012 3:57 PM" DateTime.Now.ToString("g") displays "7/18/2012 3:57:30 PM" DateTime.Now.ToString("M") displays "July 18" DateTime.Now.ToString("R") displays "Wed, 18 Jul 2012 15:57:55 GMT" DateTime.Now.ToString("s") displays "2012-07-18T15:58:02" DateTime.Now.ToString("T") displays "3:56:38 PM" DateTime.Now.ToString("t") displays "3:56 PM" DateTime.Now.ToString("U") displays "Wednesday, July 18, 2012 10:58:09 PM" DateTime.Now.ToString("u") displays "2012-07-18 15:58:17Z" DateTime.Now.ToString("Y") displays "July, 2012" DateTime.Now.ToString("42") displays "42"
我这样做了一次……我做的是创建一个Windows应用程序，在其上放置一个Label和一个TextBox并附加到TextBox Change事件上
Label1.Text = DateTime.Now.ToString(TextBox1.Text)
非常简单，可以帮助您立即尝试。