DateDiff 方法在C#中的实现

王朝c#·作者佚名  2006-11-24
窄屏简体版  字體: |||超大  

public enum DateInterval

{

Second, Minute, Hour, Day, Week, Month, Quarter, Year

}

public sealed class DateTimeManger

{

private DateTimeManger()

{}//end of default constructor

public static long DateDiff(DateInterval Interval, System.DateTime StartDate, System.DateTime EndDate )

{

long lngDateDiffValue = 0;

System.TimeSpan TS = new System.TimeSpan(EndDate.Ticks - StartDate.Ticks);

switch (Interval)

{

case DateInterval.Second:

lngDateDiffValue = (long) TS.TotalSeconds;

break;

case DateInterval.Minute:

lngDateDiffValue = (long) TS.TotalMinutes;

break;

case DateInterval.Hour:

lngDateDiffValue = (long)TS.TotalHours;

break;

case DateInterval.Day:

lngDateDiffValue = (long) TS.Days;

break;

case DateInterval.Week:

lngDateDiffValue = (long)( TS.Days / 7);

break;

case DateInterval.Month:

lngDateDiffValue = (long)( TS.Days / 30);

break;

case DateInterval.Quarter:

lngDateDiffValue = (long)( (TS.Days / 30) / 3 );

break;

case DateInterval.Year:

lngDateDiffValue = (long)( TS.Days / 365);

break;

}

return (lngDateDiffValue);

}//end of DateDiff

}//end of class

Samples:

public class DateDiffCS

{

public static void Main (string[] CmdLineArgs)

{

System.DateTime date1 = System.DateTime.Now;

System.DateTime date2 = System.DateTime.Now.AddYears(2);

System.Console.Out.WriteLine("Days : " + DateTimeManger.DateDiff

(DateTimeManger.DateInterval.Day,date1,date2).ToString());

System.Console.Out.WriteLine("Hours : " + DateTimeManger.DateDiff

(DateTimeManger.DateInterval.Hour,date1,date2).ToString());

System.Console.Out.WriteLine("Minutes : " + DateTimeManger.DateDiff

(DateTimeManger.DateInterval.Minute,date1,date2).ToString());

System.Console.Out.WriteLine("Month : " + DateTimeManger.DateDiff

(DateTimeManger.DateInterval.Month,date1,date2).ToString());

System.Console.Out.WriteLine("Quarter : " + DateTimeManger.DateDiff

(DateTimeManger.DateInterval.Quarter,date1,date2).ToString());

System.Console.Out.WriteLine("Seconds : " + DateTimeManger.DateDiff

(DateTimeManger.DateInterval.Second,date1,date2).ToString());

System.Console.Out.WriteLine("Week : " + DateTimeManger.DateDiff

(DateTimeManger.DateInterval.Week,date1,date2).ToString());

System.Console.Out.WriteLine("Year : " + DateTimeManger.DateDiff

(DateTimeManger.DateInterval.Year,date1,date2).ToString());

System.Console.In.ReadLine();

}

}//end of the class

From:

HP.Mahesh.UtilityManager.Libraries.DateTimeUtility

 
 
 
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