知识大全常见日期方法荟萃

Posted 2022-07-18 知

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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=System DateTime DaysInMonth(System

　　DateTime Now Year System DateTime Now Month);

　　二日期型格式处理通用方法在webconfig中配置如下

　　在global asax中 protected void Application_BeginRequest(Object sender EventArgs e) Thread currentThread = Thread CurrentThread; CultureInfo cul = currentThread CurrentCulture Clone() as CultureInfo; cul DateTimeFormat ShortDatePattern= BLLFacade Common GetShortDatePattern(); cul DateTimeFormat LongDatePattern= BLLFacade Common GetLongDatePattern(); cul DateTimeFormat ShortTimePattern= BLLFacade Common GetShortTimePattern(); cul DateTimeFormat LongTimePattern= BLLFacade Common GetLongTimePattern(); currentThread CurrentCulture = cul;

在业务逻辑层中

　　public static string GetShortDatePattern() return System Configuration ConfigurationSettings AppSettings[ ShortDatePattern ]; public static string GetLongDatePattern() return System Configuration ConfigurationSettings AppSettings[ LongDatePattern ]; public static string GetShortTimePattern() return System Configuration ConfigurationSettings AppSettings[ ShortTimePattern ]; public static string GetLongTimePattern() return System Configuration ConfigurationSettings AppSettings[ LongTimePattern ];

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=Convert ToDateTime( : ); // DateTime b=Convert ToDateTime( : ); // double d=Bll Common DateDiff(Bll Common EnumDateCompare day a b); // Response Write(d ToString( f ));//四舍五入 public enum EnumDateCompare year = month = day = hour = minute = second = public static double DateDiff(EnumDateCompare howtopare

　　System DateTime startDate System DateTime endDate) double diff= ; System TimeSpan TS = new System TimeSpan(endDate Ticks startDate Ticks); switch (howtopare) case EnumDateCompare year: diff = Convert ToDouble(TS TotalDays/ ); break; case EnumDateCompare month: diff = Convert ToDouble((TS TotalDays/ )* ); break; case EnumDateCompare day: diff = Convert ToDouble(TS TotalDays); break; case EnumDateCompare hour: diff = Convert ToDouble(TS TotalHours); break; case EnumDateCompare minute: diff = Convert ToDouble(TS TotalMinutes); break; case EnumDateCompare second: diff = Convert ToDouble(TS TotalSeconds); 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(System DateTime Now)); private int getDays(System DateTime date ) int m=System DateTime DaysInMonth(date Year date Month); int mm= ; for(int i= ;i<=m;i++) System DateTime date=Convert ToDateTime(date Year+ +date Month+ +i); switch (date DayOfWeek) case System DayOfWeek Monday: case System DayOfWeek Thursday: case System DayOfWeek Tuesday: case System DayOfWeek Wednesday: case System DayOfWeek Friday: mm=mm+ ; 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 date =Convert ToDateTime( ); //DateTime date =Convert ToDateTime( ); //int days =getDays(date date ); private int getDays(System DateTime date System DateTime date ) string m=DateDiff(EnumDateCompare day date date ) ToString( f ); int mm= ; for(int i= ;i<=Convert ToInt (m);i++) System DateTime date=Convert ToDateTime(date AddDays(i)); switch (date DayOfWeek) case System DayOfWeek Monday: case System DayOfWeek Thursday: case System DayOfWeek Tuesday: case System DayOfWeek Wednesday: case System DayOfWeek Friday: mm=mm+ ; break; return mm; #endregion 六格式输出

　　格式输出#region 格式输出 private void Page_Load(object sender System EventArgs e) System Globalization DateTimeFormatInfo myDTFI = new System

　　Globalization CultureInfo( en US false ) DateTimeFormat;//中国用zh cn DateTime myDT =System DateTime Now; Response Write(myDT ToString( f myDTFI)); /**//**//**//* This code produces the following output FORMAT en US EXAMPLE CHAR VALUE OF ASSOCIATED PROPERTY IF ANY d / / M/d/yyyy (ShortDatePattern) D Thursday January dddd MMMM dd yyyy (LongDatePattern) f Thursday January : AM F Thursday January : : AM dddd MMMM dd yyyy h:mm:ss tt (FullDateTimePattern) g / / : AM G / / : : AM m January MMMM dd (MonthDayPattern) M January MMMM dd (MonthDayPattern) r Thu Jan : : GMT ddd dd MMM yyyy HH : mm : ss GMT (RFC Pattern) R Thu Jan : : GMT ddd dd MMM yyyy HH : mm : ss GMT (RFC Pattern) s T : : yyyy MM dd T HH : mm : ss (SortableDateTimePattern) t : AM h:mm tt (ShortTimePattern) T : : AM h:mm:ss tt (LongTimePattern) u : : Z yyyy MM dd HH : mm : ss Z (UniversalSortableDateTimePattern) U Thursday January : : AM y January MMMM yyyy (YearMonthPattern) Y January MMMM yyyy (YearmonthPattern) */ #endregion

七获得本周的周六和周日

　　ConvertDateToWeek#region ConvertDateToWeek public static void ConvertDateToWeek(DateTime date

cha138/Article/program/net/201311/11629

知识大全 常见日期方法荟萃

知识大全常见日期方法荟萃