Question

I have an application where i show Flight Departure Date and Arrival Date and Flight Time Duration.

For Flight Time Duration , i simply subtract dates which gives me TimeStamp like

TimeStamp duration = arrivalDate.subtract(departureDate);

so record is like

               Departure          Arrival                   Duration
               Sat 07:05A         Sat 09:20A                2h 15m
               Sat 10:10A         Sat 11:15A                1h 05m
               Sat 05:15P         Sat 07:16P                2h 01m
Total Duration                                              5h 21m

I have many such flight records and i need to show Total Flight Duration , for this
i simply add Time span like

TimeStamp totalDuration = totalDuration.Add(duration);

But i got a situation where totalDuration reaches a value like {1.02:10:00} and when trying to convert this value to DateTime like this

TotalConnectionTime = new DateTime(2012,06, 30,(int)totalDuration.TotalHours, totalDuration.Minutes, 0);

it gives error

“Hour, Minute, and Second parameters describe an un-representable DateTime.”

(int)totalDuration.TotalHours = 26 and this create problem

I need to covert to {1.02:10:00} to 26h 10m which means 1 Day = 24 hours + 2 hours + 10 min

Hope i clear my point.

Thanks for any help.

Answer 1

Anil,

Bqased on the comments above, I’d suggest saving a DateTime as the Departutre time (UTC) and then saving the minutes as an integer column. You can then calculate the offset as required. Below is a little console app to demonstrate the timespan usage, based on your example:

class Program
{
    static void Main(string[] args)
    {
        TimeSpan timeSpan = new TimeSpan(0,1570,0);
        var stringDisplay = string.Format("{0}:{1}:{2}", timeSpan.Days, timeSpan.Hours, timeSpan.Minutes);
        Console.WriteLine(stringDisplay);
        Console.ReadKey();
    }
}

this produces a result of : 1:2:10 (1 day, 2 hours and 10 minutes).

this should work well for you when adding to your initial Departure time, i.e.:

DateTime departure = new DateTime(2012, 6, 21, 7, 30, 0);
DateTime completeJourney = departure.Add(timeSpan);

Hope this helps.