Subtract TimeSpan bigger than 24H

Question

I need to compare two TimeSpan values bigger than 24 hours. For that I use the following code

string startTime = textBox1.Text;
string endTime = textBox21.Text;
TimeSpan startTimet = new TimeSpan(int.Parse(startTime.Split(':')[0]),    // hours
                      int.Parse(startTime.Split(':')[1]),    // minutes
                      0);
TimeSpan endTimet = new TimeSpan(int.Parse(endTime.Split(':')[0]),    // hours
                    int.Parse(endTime.Split(':')[1]),    // minutes
                    0);
TimeSpan duration = endTimet.Subtract(startTimet);
label29.Text = duration.ToString();

If the values aren't bigger than 24H it's all ok, but if I have a value bigger than 24h the TimeSpan will appear like DD.HH.MM.SS.

For example:

endTimet = 32:15

startTimet = 02:00

duration = 1.06:15:00

And what I really need is the normal format like HH:MM, assuming the hours are greater than 24, getting the expected 30:15

Can anyone help me here? Regards

Duplicate of http://stackoverflow.com/questions/3505230/format-timespan-greater-than-24-hour — dotNET, Nov 05 '14 at 16:46
@MattJohnson: What difference do you see? The accepted answer of Jon does precisely what has been asked by the OP here. — dotNET, Nov 05 '14 at 17:22
@dotNET - The technique is similar, yes. However the requested format is different. This question also involves parsing and subtraction, though one might argue those are extraneous to the question. It could go either way really, but in my mind it's not an *exact* duplicate. — Matt Johnson-Pint, Nov 05 '14 at 17:26

Tim Schmelter · Accepted Answer · 2014-11-05T17:09:49.397

2

Perhaps with this workaround:

TimeSpan duration = TimeSpan.FromHours(30);
string result = string.Format("{0}:{1}"
    , duration.TotalHours
    , duration.Minutes);  // 30:00

edited Nov 05 '14 at 17:09

answered Nov 05 '14 at 16:47

Tim Schmelter

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score 1 · Answer 2 · answered Nov 05 '14 at 17:01

Noda Time to the rescue!

string s1 = "123:45";
string s2 = "234:56";

DurationPattern p = DurationPattern.CreateWithInvariantCulture("H:mm");
Duration d1 = p.Parse(s1).Value;
Duration d2 = p.Parse(s2).Value;

Duration diff = d2 - d1;

string result = p.Format(diff);  // "111:11"

Subtract TimeSpan bigger than 24H

2 Answers2