Time Calculation

indian22

Hai! How to Calculate Total Elapsed time from given starting value and ending value when the the given values are greater than 24(ie Meter Readings)(for eg:Starting time=1015:35,Ending time=1058:15) Plz Send any Ideas, Thank You

mrcooll

what do u mean by 1015:35 is it H:M if it's TimeSpan end = new TimeSpan(1015, 35, 0); TimeSpan start = new TimeSpan(1058, 15, 0); TimeSpan sub= end.Subtract(start); double TotalSeconds = sub.TotalSeconds;

0x3c0

If you convert those strings to DateTime structures (possibly using DateTime.ParseExact, I don't know the exact form of the strings you gave) then you can simply subtract the starting time from the ending time to get the elapsed time as an instance of the TimeSpan structure. That lets you access such properties as TotalHours, TotalMinutes, TotalSeconds and TotalMilliseconds

indian22

     DateTime date1 = System.Convert.ToDateTime(txtstarttime.Text);

    DateTime date2 = System.Convert.ToDateTime(txtendtime.Text);
    TimeSpan ts = new TimeSpan();

    ts = date2.Subtract(date1);
    DateTime dt = DateTime.MinValue.Add(ts);
     txttottime.Text=ts.Hours + ":" + ts.Minutes + ":" + ts.Seconds  ;

I have used this but it Produce error when the given values are greater than 24

0x3c0

What format are txtstarttime.Text and txtendtime.Text in? Are they hours:minutes:seconds like your output? If so, then you can replace the System.Convert.ToDateTime calls with System.DateTime.Parse("input goes here", "hh:mm:ss", null)

indian22

My Format is ("HH:MM")

0x3c0

You can replace the System.Convert.ToDateTime calls with System.DateTime.Parse("input goes here", "hh:mm", null). The first parameter will be your Text properties instead of the string "input goes here"

mrcooll

u can use this but i don't recommend it string x1="1015:35"; string[] r=x1.Split(':'); TimeSpan end = new TimeSpan(int.Parse(r[0]), int.Parse(r[1]), 0); //bla bla bla //bla bla bla TimeSpan sub= end.Subtract(start);

Alan N

Hi, Hmm, you need to stop for a moment and think about what you are trying to do. If the measured time span is 24 hours or more then information about the number of days that have passed is required to perform the calculation. If the time span is guaranteed to be less than 24 hours the following pseudocode is valid

// Calculate time span
duration = endtime - starttime;
// if the value is negative then assume that
// midnight has passed
// and therefore end day = start day + 1
if duration < 0 then duration = duration + 24 hours;

Note how this would fail as soon as the actual time span is 24 hours or more. Alan. [EDIT corrected error in code fragment]

modified on Sunday, May 31, 2009 9:29 AM