Implementation code of asp.net computing time and date interval

First, let's look at the simplest. net code for calculating the time difference.

The code is as follows:	Copy code
DateTime dt1 = new DateTime ); DateTime dt2 = new DateTime ); System. TimeSpan st = dt2.sSubtract (dt1 ); This. TextBox1.Text = st. Days. ToString () + "day" + St. Hours. ToString () + "hour" + St. Minutes. ToString () + "minute" + St. Seconds. ToString () + "Seconds ";

Instances, such as the number of days and seconds before the date and time

Function:

The code is as follows:

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/// <Summary> /// Return the time interval between two dates (y: year interval, M: month interval, d: day interval, h: hour interval, m: minute interval, s: second interval) /// </Summary> /// <Param name = "Date1"> start date </param> /// <Param name = "Date2"> end date </param> /// <Param name = "Interval"> Interval flag </param> /// <Returns> return interval indicates the specified interval </returns> Private int DateDiff (System. DateTime Date1, System. DateTime Date2, string Interval) { Double dblYearLen = 365; // The length of the year, 365 days Double dblMonthLen = (365/12); // average number of days per month System. TimeSpan objT; ObjT = Date2.Subtract (Date1 ); Switch (Interval) { Case "y": // returns the year interval of the date. Return System. Convert. ToInt32 (objT. Days/dblYearLen ); Case "M": // return the month interval of the date Return System. Convert. ToInt32 (objT. Days/dblMonthLen ); Case "d": // The number of days before the return date. Return objT. Days; Case "h": // returns the hour interval of the date Return System. Convert. ToInt32 (objT. TotalHours ); Case "m": // return the minute interval of the date Return System. Convert. ToInt32 (objT. TotalMinutes ); Case "s": // return the second interval of the date Return System. Convert. ToInt32 (objT. TotalSeconds ); Default: Break; } Return 0; }

Usage:

The code is as follows:

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Private void Form1_Load (object sender, System. EventArgs e) { System. DateTime dt1, dt2; Dt1 = new DateTime (November 5, 1 ); Dt2 = new DateTime (November 6, 30 ); System. Console. WriteLine (this. DateDiff (dt1, dt2, "Y ")); System. Console. WriteLine (this. DateDiff (dt1, dt2, "M ")); System. Console. WriteLine (this. DateDiff (dt1, dt2, "d ")); System. Console. WriteLine (this. DateDiff (dt1, dt2, "h ")); System. Console. WriteLine (this. DateDiff (dt1, dt2, "m ")); System. Console. WriteLine (this. DateDiff (dt1, dt2, "s ")); }

Instance

The code is as follows:

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DateTime dt1, dt2; // if not the time type, convert it to the time type TimeSpan d = dt1.Subtract (dt2 ); D. Days =... // This is the number of Days D. Minutes =... // This is minute 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

The call method is simple in the form of a function.