Convert string Time format to Time format

Question

I have a string

10:30AM

I want to convert into

10:30:00 AM

The resulting string should be in time format(HH:MM:SS AM/PM). How do I do this?

Have you tried anything yet? You should probably parse to a `DateTime` (ignoring the date) in the current format, then reformat to the format you want. — Jon Skeet, Sep 25 '15 at 12:19
[Parsing Date and Time Strings in the .NET Framework](https://msdn.microsoft.com/en-us/library/2h3syy57(v=vs.110).aspx) — Liam, Sep 25 '15 at 12:20
This is one of them times where I wished *"this is just plain laziness"* was a close reason — Liam, Sep 25 '15 at 12:22
possible duplicate of [Converting a String to DateTime](http://stackoverflow.com/questions/919244/converting-a-string-to-datetime) — slavoo, Sep 25 '15 at 12:28

score 2 · Answer 1 · answered Sep 25 '15 at 12:23

2

You want to convert "10:30AM" to "10:30:00 AM"? Use DateTime methods:

string time = "10:30AM";
DateTime dt = DateTime.ParseExact(time, "hh:mmtt", DateTimeFormatInfo.InvariantInfo);
string result = dt.ToString("hh:mm:ss tt", DateTimeFormatInfo.InvariantInfo);

worth reading: https://msdn.microsoft.com/en-us/library/8kb3ddd4(v=vs.110).aspx

answered Sep 25 '15 at 12:23

Tim Schmelter

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Does `DateTimeFormatInfo.InvariantInfo` has any benefit over `CultureInfo.InvariantCulture`? – Hossein Narimani Rad Sep 25 '15 at 12:31
1

@HosseinNarimaniRad: Not that I know of. I'm using it because i'm not interested in all culture settings but only those related to datetime. If i parse numbers i use `NumberFormatInfo.InvariantInfo`. I guess it's a matter of taste. – Tim Schmelter Sep 25 '15 at 12:34
Good at least this is a different approach. – Hossein Narimani Rad Sep 25 '15 at 12:37

Hossein Narimani Rad · Accepted Answer · 2015-09-25T12:29:20.397

1

You can try ParseExact method to convert a custom string to a DateTime, then use ToString method to convert it to your desired string format.

 var result = DateTime.ParseExact("10:30AM", "hh:mmtt", CultureInfo.InvariantCulture)
                      .ToString("hh:mm:ss tt");
//result : "10:30:00 AM"

In the DateTime formatting you may remember these notes:

hh: hour part
mm: minute part
ss: second part
tt: represent AM/PM part

edited Sep 25 '15 at 12:29

answered Sep 25 '15 at 12:23

Hossein Narimani Rad

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It Works... thank you very much... – Pravin Sep 25 '15 at 12:39
1

One pitfall here, you aren't using `.ToString("hh:mm:ss tt",CultureInfo.InvariantCulture)`. So this works only if the current culture uses the `AM/PM` designator. Otherwise you get: `"10:30:00 "` – Tim Schmelter Sep 25 '15 at 12:40
@TimSchmelter good point. – Hossein Narimani Rad Sep 25 '15 at 13:20

Convert string Time format to Time format

2 Answers2