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asp.net下日期和时间处理的类库


发布日期:2020年01月05日
 
asp.net下日期和时间处理的类库

复制代码 代码如下:

using System;

namespace Utilities

{

/// <summary>

/// Common DateTime Methods

/// </summary>

///

public enum Quarter

{

First =

Second =

Third =

Fourth =

}

public enum Month

{

January =

February =

March =

April =

May =

June =

July =

August =

September =

October =

November =

December =

}

public class DateUtilities

{

#region Quarter

public static DateTime GetStartOfQuarter( int Year Quarter Qtr )

{

if( Qtr == QuarterFirst ) // st Quarter = January to March

return new DateTime( Year );

else if( Qtr == QuarterSecond ) // nd Quarter = April to June

return new DateTime( Year );

else if( Qtr == QuarterThird ) // rd Quarter = July to September

return new DateTime( Year );

else // th Quarter = October to December

return new DateTime( Year );

}

public static DateTime GetEndOfQuarter( int Year Quarter Qtr )

{

if( Qtr == QuarterFirst ) // st Quarter = January to March

return new DateTime( Year DateTimeDaysInMonth( Year ) );

else if( Qtr == QuarterSecond ) // nd Quarter = April to June

return new DateTime( Year DateTimeDaysInMonth( Year ) );

else if( Qtr == QuarterThird ) // rd Quarter = July to September

return new DateTime( Year DateTimeDaysInMonth( Year ) );

else // th Quarter = October to December

return new DateTime( Year DateTimeDaysInMonth( Year ) );

}

public static Quarter GetQuarter( Month month )

{

if( month <= MonthMarch ) // st Quarter = January to March

return QuarterFirst;

else if( ( month >= MonthApril ) && ( month <= MonthJune ) ) // nd Quarter = April to June

return QuarterSecond;

else if( ( month >= MonthJuly ) && ( month <= MonthSeptember ) ) // rd Quarter = July to September

return QuarterThird;

else // th Quarter = October to December

return QuarterFourth;

}

public static DateTime GetEndOfLastQuarter()

{

if( DateTimeNowMonth <= (int)MonthMarch ) //go to last quarter of previous year

return GetEndOfQuarter( DateTimeNowYear GetQuarter( MonthDecember ));

else //return last quarter of current year

return GetEndOfQuarter( DateTimeNowYear GetQuarter( (Month)DateTimeNowMonth));

}

public static DateTime GetStartOfLastQuarter()

{

if( DateTimeNowMonth <= ) //go to last quarter of previous year

return GetStartOfQuarter( DateTimeNowYear GetQuarter( MonthDecember ));

else //return last quarter of current year

return GetStartOfQuarter( DateTimeNowYear GetQuarter( (Month)DateTimeNowMonth));

}

public static DateTime GetStartOfCurrentQuarter()

{

return GetStartOfQuarter( DateTimeNowYear GetQuarter( (Month)DateTimeNowMonth ));

}

public static DateTime GetEndOfCurrentQuarter()

{

return GetEndOfQuarter( DateTimeNowYear GetQuarter( (Month)DateTimeNowMonth ));

}

#endregion

#region Weeks

public static DateTime GetStartOfLastWeek()

{

int DaysToSubtract = (int)DateTimeNowDayOfWeek + ;

DateTime dt = DateTimeNowSubtract( SystemTimeSpanFromDays( DaysToSubtract ) );

return new DateTime( dtYear dtMonth dtDay );

}

public static DateTime GetEndOfLastWeek()

{

DateTime dt = GetStartOfLastWeek()AddDays();

return new DateTime( dtYear dtMonth dtDay );

}

public static DateTime GetStartOfCurrentWeek()

{

int DaysToSubtract = (int)DateTimeNowDayOfWeek ;

DateTime dt = DateTimeNowSubtract( SystemTimeSpanFromDays( DaysToSubtract ) );

return new DateTime( dtYear dtMonth dtDay );

}

public static DateTime GetEndOfCurrentWeek()

{

DateTime dt = GetStartOfCurrentWeek()AddDays();

return new DateTime( dtYear dtMonth dtDay );

}

#endregion

#region Months

public static DateTime GetStartOfMonth( int Month int Year )

{

return new DateTime( Year Month );

}

public static DateTime GetEndOfMonth( int Month int Year )

{

return new DateTime( Year Month DateTimeDaysInMonth( Year Month ) );

}

public static DateTime GetStartOfLastMonth()

{

if( DateTimeNowMonth == )

return GetStartOfMonth( DateTimeNowYear );

else

return GetStartOfMonth( DateTimeNowMonth DateTimeNowYear );

}

public static DateTime GetEndOfLastMonth()

{

if( DateTimeNowMonth == )

return GetEndOfMonth( DateTimeNowYear );

else

return GetEndOfMonth( DateTimeNowMonth DateTimeNowYear );

}

public static DateTime GetStartOfCurrentMonth()

{

return GetStartOfMonth( DateTimeNowMonth DateTimeNowYear );

}

public static DateTime GetEndOfCurrentMonth()

{

return GetEndOfMonth( DateTimeNowMonth DateTimeNowYear );

}

#endregion

#region Years

public static DateTime GetStartOfYear( int Year )

{

return new DateTime( Year );

}

public static DateTime GetEndOfYear( int Year )

{

return new DateTime( Year DateTimeDaysInMonth( Year ) );

}

public static DateTime GetStartOfLastYear()

{

return GetStartOfYear( DateTimeNowYear );

}

public static DateTime GetEndOfLastYear()

{

return GetEndOfYear( DateTimeNowYear );

}

public static DateTime GetStartOfCurrentYear()

{

return GetStartOfYear( DateTimeNowYear );

}

public static DateTime GetEndOfCurrentYear()

{

return GetEndOfYear( DateTimeNowYear );

}

#endregion

#region Days

public static DateTime GetStartOfDay( DateTime date )

{

return new DateTime( dateYear dateMonth dateDay );

}

public static DateTime GetEndOfDay( DateTime date )

{

return new DateTime( dateYear dateMonth dateDay );

}

#endregion

}

}

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