Handle negative time spans

Question

In my output of a grid, I calculate a TimeSpan and take its TotalHours. e.g.

(Eval(\"WorkedHours\") - Eval(\"BadgedHours\")).TotalH         


        

Answer 1

Hi i worked this into a bit of code i have been writing, hope it helps

(results) is an int variable

(TimeSpan.FromMinutes(result)) < TimeSpan.Zero ? "-" + TimeSpan.FromMinutes(result).ToString(@"hh\:mm") : "" + TimeSpan.FromMinutes(result).ToString(@"hh\:mm");

Answer 2

TimeSpan Diff = Date1 - Date2;

if ((int)Diff.TotalDays < 0) { // your code }

Answer 3

Just multiply it by -1 or use an absolute value function.

Answer 4

static string ToHMString(TimeSpan timespan) { 
    if (timespan.Ticks < 0) return "-" + ToHMString(timespan.Negate());

    return timespan.TotalHours.ToString("#0") + ":" + timespan.Minutes.ToString("00");
}

Console.WriteLine(ToHMString(TimeSpan.FromHours(3)));       //Prints "3:00"
Console.WriteLine(ToHMString(TimeSpan.FromHours(-27.75)));  //Prints "-28:45"

This will also work correctly if the timespan is longer than 24 hours.

Answer 5

The simple solution would be to do:

string format = "HH:mm";
if(hours < 0)
  format = "-" + format;

hours = Math.Abs(hours)

Answer 6

Isn't there a TimeSpan.Duration method? I think this would handle what you are trying to do.