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using System;
using System.Globalization;
String format="D";
DateTime date=DataTime,Now;
Response.Write(date.ToString(format, DateTimeFormatInfo.InvariantInfo));
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d ShortDatePattern
D LongDatePattern
f ÍêÕûÈÕÆÚºÍʱ¼ä£¨³¤ÈÕÆÚºÍ¶Ìʱ¼ä£©
F FullDateTimePattern£¨³¤ÈÕÆÚºÍ³¤Ê±¼ä£©
g ³£¹æ£¨¶ÌÈÕÆÚºÍ¶Ìʱ¼ä£©
G ³£¹æ£¨¶ÌÈÕÆÚºÍ³¤Ê±¼ä£©
m¡¢M MonthDayPattern
r¡¢R RFC1123Pattern
s ʹÓõ±µØÊ±¼äµÄ SortableDateTimePattern£¨»ùÓÚ ISO 8601£©
t ShortTimePattern
T LongTimePattern
u UniversalSortableDateTimePattern ÓÃÓÚÏÔʾͨÓÃʱ¼äµÄ¸ñʽ
U ʹÓÃͨÓÃʱ¼äµÄÍêÕûÈÕÆÚºÍʱ¼ä£¨³¤ÈÕÆÚºÍ³¤Ê±¼ä£©
y¡¢Y YearMonthPattern
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dd ÔÂÖеÄijһÌ졣һλÊýµÄÈÕÆÚÓÐÒ»¸öǰµ¼Áã¡£
ddd ÖÜÖÐijÌìµÄËõдÃû³Æ£¬ÔÚ AbbreviatedDayNames Öж¨Òå¡£
dddd ÖÜÖÐijÌìµÄÍêÕûÃû³Æ£¬ÔÚ DayNames Öж¨Òå¡£
M Ô·ÝÊý×Ö¡£Ò»Î»ÊýµÄÔ·ÝûÓÐǰµ¼Áã¡£
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MMM Ô·ݵÄËõдÃû³Æ£¬ÔÚ AbbreviatedMonthNames Öж¨Òå¡£
MMMM Ô·ݵÄÍêÕûÃû³Æ£¬ÔÚ MonthNames Öж¨Òå¡£
y ²»°üº¬¼ÍÔªµÄÄê·Ý¡£Èç¹û²»°üº¬¼ÍÔªµÄÄê·ÝСÓÚ 10£¬ÔòÏÔʾ²»¾ßÓÐǰµ¼ÁãµÄÄê·Ý¡£
yy ²»°üº¬¼ÍÔªµÄÄê·Ý¡£Èç¹û²»°üº¬¼ÍÔªµÄÄê·ÝСÓÚ 10£¬ÔòÏÔʾ¾ßÓÐǰµ¼ÁãµÄÄê·Ý¡£
yyyy °üÀ¨¼ÍÔªµÄËÄλÊýµÄÄê·Ý¡£
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MSComm1.PortOpen = True
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