Adding two dates to eachother

Question

string final = Convert.ToString(DateTime.Parse(date, System.Globalization.CultureInfo.InvariantCulture) + TimeSpan.Parse(duration));

Hi, I use the above code to add two date's to eachother. It do work very well on Windows and returns the required format yyyy-MM-dd HH:mm:ss in a correct fashion. HOWEVER, when on Linux building with Mono it returns the following format dd/MM/yyyy HH:mm:ss which is not what I want.

How can I specify that I ONLY want the first formatting and nothing else? I tried playing around with ParseExact but it did not do very well. What I've heard ParseExact should not really be needed for this?

Here is a example of input:

string date = "2014-10-30 10:00:04"; // On windows

string duration = "05:02:10"; // duration to be added to date

Greetings.

Tim Schmelter · Accepted Answer · 2014-10-30 09:37:10Z

2

Use ToString("yyyy-MM-dd HH:mm:ss") instead of Convert.ToString.

string date = "2014-10-30 10:00:04";  
string duration = "05:02:10";  
DateTime dt1 = DateTime.Parse(date, CultureInfo.InvariantCulture);
TimeSpan ts = TimeSpan.Parse(duration, CultureInfo.InvariantCulture);
DateTime dtFinal = dt1.Add(ts);
string final = dtFinal.ToString("yyyy-MM-dd HH:mm:ss", CultureInfo.InvariantCulture);

Convert.ToString uses your current culture's date separator, use CultureInfo.InvariantCulture.

Read: Custom Date and Time Format Strings

edited Oct 30, 2014 at 9:37

answered Oct 30, 2014 at 9:26

Tim Schmelter

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MichaelS · Accepted Answer · 2014-10-30 09:26:35Z

2

You can use the ToString() Method of the DateTime object.

var dt = DateTime.Now;
dt.ToString("yyyy-MM-dd HH:mm");

answered Oct 30, 2014 at 9:26

MichaelS

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Comments

Tyress · Accepted Answer · 2014-10-30 09:36:58Z

0

Using your code:

string _final = (DateTime.Parse(date, System.Globalization.CultureInfo.InvariantCulture) + TimeSpan.Parse(duration)).ToString("yyyy-MM-dd HH:mm:ss");

edited Oct 30, 2014 at 9:36

answered Oct 30, 2014 at 9:28

Tyress

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