常见日期方法荟萃

Author:小山

from:Cnblogs

常见日期方法荟萃 一.如何获得当月有多少天 　　int m=ysInMonth(System.

ar,nth);

二.日期型格式处理通用方法 1.在webconfig中配置如下 2.在ax中protected void Application_BeginRequest(Object sender虽经众多媒体多方“围追堵截”, EventArgs e){Thread currentThread = rrentThread;CultureInfo cul = one() as CultureInfo;ortDatePattern= tShortDatePattern();ngDatePattern= tLongDatePattern();ortTimePattern= tShortTimePattern();ngTimePattern= tLongTimePattern();rrentCulture = cul;}

3.在业务逻辑层中 public static string GetShortDatePattern(){return pSettings["ShortDatePattern"];}public static string GetLongDatePattern(){return pSettings["LongDatePattern"];}public static string GetShortTimePattern(){return pSettings["ShortTimePattern"];}public static string GetLongTimePattern(){return pSettings["LongTimePattern"];}

4.然后在其他地方正常调用就可以了，如果需要修改格式只需要修改webconfig中的，且可以保证整个系统中的所有格式都是一致的 三.在中怎么样计算两个日期相差的年、月份、日期、小时、分钟 、妙等在中怎么样计算两个日期相差的年、月份、日期、小时、分钟 、妙等#region 在中怎么样计算两个日期相差的年、月份、日期、小时、分钟 、妙等 // 调用// DateTime a=DateTime(" 20:15");// DateTime b=DateTime(" 09:09 ");// double d=teDiff(y,a,b);// ite(String("f0"));//四舍五入 public enum EnumDateCompare { year =1, month =2, day =3, hour =4, minute =5, second =6 } public static double DateDiff(EnumDateCompare howtocompare,

teTime startDate, teTime endDate) { double diff=0; meSpan TS = new meSpan(cks); switch (howtocompare) { case ar: diff = Double(talDays/365); break; case nth: diff = Double((talDays/365)*12); break; case y: diff = Double(talDays); break; case ur: diff = Double(talHours); break; case nute: diff = Double(talMinutes); break; case cond: diff = Double(talSeconds); break; } return diff; } #endregion四.获取某月的实际工作日(即不包括周六日)//调用//int days =getDays(w));private int getDays(teTime date1){ int m=ysInMonth(ar,nth); int mm=0; for(int i=1;i=m;i++) { teTime date=DateTime(ar+"-"+nth+"-"+i); switch (yOfWeek) { case nday: case ursday: case esday: case dnesday: case iday: mm=mm+1; break; } } return mm;}

五.获得任意两日期之间的有效工作日(不包括周六日) 获得任意两日期之间的有效工作日(不包括周六日)#region 获得任意两日期之间的有效工作日(不包括周六日) //调用 //DateTime date1=DateTime(""); //DateTime date2=DateTime(""); //int days =getDays(date1,date2); private int getDays(teTime date1,teTime date2) { string m=DateDiff(y,date1,date2).ToString("f0"); int mm=0; for(int i=0;i=Int32(m);i++) { teTime date=DateTime(dDays(i)); switch (yOfWeek) { case nday: case ursday: case esday: case dnesday: case iday: mm=mm+1; break; } } return mm; } #endregion六.格式输出格式输出#region 格式输出 private void Page_Load(object sender, entArgs e) { teTimeFormatInfo myDTFI = new System.

ltureInfo( "en-US", false ).DateTimeFormat;//中国用zh-cn DateTime myDT =w; ite(String("f",myDTFI)); /**//**//**//* This code produces the following output. FORMAT en-US EXAMPLE CHAR VALUE OF ASSOCIATED PROPERTY将在8月7日全国党代表大会上, IF ANY d 1/3/2002 M/d/yyyy (ShortDatePattern) D Thursday, January 03, 2002 dddd, MMMM dd, yyyy (LongDatePattern) f Thursday, January 03, 2002 12:00 AM F Thursday, January 03, 2002 12:00:00 AM dddd, MMMM dd, yyyy h:mm:ss tt (FullDateTimePattern) g 1/3/2002 12:00 AM G 1/3/2002 12:00:00 AM m January 03 MMMM dd (MonthDayPattern) M January 03 MMMM dd (MonthDayPattern) r Thu, 03 Jan 2002 00:00:00 GMT ddd, dd MMM yyyy HH':'mm':'ss 'GMT' (RFC1123Pattern) R Thu, 03 Jan 2002 00:00:00 GMT ddd, dd MMM yyyy HH':'mm':'ss 'GMT' (RFC1123Pattern) s T00:00:00 yyyy'-'MM'-'dd'T'HH':'mm':'ss (SortableDateTimePattern) t 12:00 AM h:mm tt (ShortTimePattern) T 12:00:00 AM h:mm:ss tt (LongTimePattern) u 00:00:00Z yyyy'-'MM'-'dd HH':'mm':'ss'Z' (UniversalSortableDateTimePattern) U Thursday, January 03, 2002 8:00:00 AM y January, 2002 MMMM, yyyy (YearMonthPattern) Y January, 2002 MMMM, yyyy (YearMonthPattern) */ } #endregion

七.获得本周的周六和周日ConvertDateToWeek#region ConvertDateToWeek public static void ConvertDateToWeek(DateTime date,

out DateTime firstdate,out DateTime lastdate) { DateTime first=w; DateTime last=w; switch (yOfWeek) { case nday: first=dDays(-1); last=dDays(5); break; case esday: first=dDays(-2); last=dDays(4); break; case dnesday: first=dDays(-3); last=dDays(3); break; case ursday: first=dDays(-4); last=dDays(2); break; case iday: first=dDays(-5); last=dDays(1); break; case turday: first=dDays(-6); last=date; break; case nday: first=date; last=dDays(6); break; } firstdate=first; lastdate=last; } #endregion //调用DateTime firstdate=w; DateTime lastdate=w;ConvertDateToWeek(date,out firstdate,out lastdate);八获得当前日期是该年度的第几周DateTime dt = DateTime("");int weeks = yOfYear / 7 + 1;

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