String to Custom DateTime Format Parse C# [duplicate]

Question

I have a string like this

"10/22/2012 9:13:15 PM".

I want to parse it to DateTime Format like this format

"2012-10-22T21:13:15+00:00"

This is my code.

string startTime = "10/22/2012 9:13:15 PM";

Datetime date = DateTime.ParseExact(
  startTime, 
 "yyyy’-‘MM’-‘dd’T’HH’:’mm’:’ss.fffffffK", 
  CultureInfo.InvariantCulture, 
  DateTimeStyles.None);

But it generates this exception.

System.FormatException: String '10/22/2012 5:00:00 PM' was not recognized as a valid DateTime.

How to solve it?

Your format specifies all characters that MUST be in the string. Your string input must look like "2012’-‘10’-‘20’T’09’:’13’:’15.fffffffK" ... and whatever fffffffK is - look UP the format strings and fix it to suit your given input. — Patrick Artner
– Patrick Artner, Commented Apr 12, 2023 at 5:37
When it's a DateTime, it doesn't have a format. It instead is just wrapping an integer counting the number of 100ns intervals since its epoch date. Don't confuse data with presentation. — Damien_The_Unbeliever
– Damien_The_Unbeliever, Commented Apr 12, 2023 at 5:47

Dmitrii Bychenko · Accepted Answer · 2023-04-12 05:48:03Z

3

You should ParseExact string into date using existing format:

string startTime = "10/22/2012 9:13:15 PM";
  
DateTime date = DateTime.ParseExact(
  startTime, 
 "M/d/yyyy h:m:s tt", // <- given format 
  CultureInfo.InvariantCulture, 
  DateTimeStyles.None);

And only then format the date while using desired format:

// format we want
var result = date.ToString("yyyy'-'MM'-'dd'T'HH':'mm':'ss.fffffffK");

edited Apr 12, 2023 at 5:48

answered Apr 12, 2023 at 5:42

Dmitrii Bychenko

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Comments

Muhammad Adeel · Accepted Answer · 2023-04-12 05:39:28Z

0

you can use DateTime.Parse instead of DateTime.ParseExact

here is code

string dateInput = "10/22/2012 9:13:15 PM";
var parsedDate = DateTime.Parse(dateInput);

answered Apr 12, 2023 at 5:39

Muhammad Adeel

196 bronze badges

1 Comment

Dmitrii Bychenko Over a year ago

Note, that Parse uses CultureInfo.CurrentCulture which vary from workstation to workstation, so your solution will work on some computers only

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