Convert “M/d/yyyy h:mm:ss tt” to “YYYY-MM-DDThh:mm:ss.SSSZ”

Question

As title suggests, what I want to do is to convert my date-string eg

• "6/6/2014 12:24:30 PM" (M/d/yyyy h:mm:ss tt) format

to

• "YYYY-MM-DDThh:mm:ss.SSSZ" format.

I am trying in the following way. It's not giving me any exception, but I am getting the value like :

• "YYYY-06-DDT12:24:30.SSSZ"

How can I exactly achieve this?

string LastSyncDateTime = "6/6/2014 12:24:30 PM";
DateTime dt = DateTime.ParseExact(LastSyncDateTime, "M/d/yyyy h:mm:ss tt",CultureInfo.InvariantCulture);
string result = dt.ToString("YYYY-MM-DDThh:mm:ss.SSSZ");

Answer 1

The simplest way is to use the "o" date formatter, like this:

dt.ToString("o");

This method will give you a timestring in the ISO 8601 format, something like this:

2014-12-25T11:56:54.9571247Z

but, since that ISO 8601 uses more than 3 decimal digits to define the second , if you only want to stop at milliseconds you can use the full formatting string and write down ss.fffzzz at the end, like this:

dt.ToString("yyyy-MM-ddThh:mm:ss.fffzzz");

and the result will be:

2014-12-25T11:56:54.957Z

For more informations you can refer to THIS LIST of date formatting options.

Answer 2

Data time Formats Can't recognize, the non Case sensitive chars in some systems due to their internal settings. Please refer the below code, which works fine

string result = dt.ToString("yyyy-MM-ddThh:mm:ss.SSSZ");

The above code will result as 2014-06-06T12:24:30.SSSZ

EDIT :

The below snippet will give you milliseconds as well

dt.ToString("yyyy-MM-ddThh:mm:ss.fffZ");

Answer 3

but I am getting the value like " YYYY-06-DDT12:24:30.SSSZ "

Let me explain why you get this result. Since there is no custom date and time format as YYYY , DD , SSS or Z , these characters are copied to the result string unchanged .

I strongly suspect you want to use yyyy , dd , fff and z format specifiers instead.

You can use DateTime.TryParseExact method like;

string s = "6/6/2014 12:24:30 PM";
DateTime dt;
if(DateTime.TryParseExact(s, "M/d/yyyy hh:mm:ss tt",
                          CultureInfo.InvariantCulture,
                          DateTimeStyles.None, out dt))
{
    Console.WriteLine(dt.ToString("yyyy-MM-ddThh:mm:ss.fffz"));
}

Here a demonstration on Ideone .

Result will be 2014-06-06T12:24:30.000+3 on my machine because my time zone is UTC +3 right now. Time zone information might change based on your UTC value as well.

Answer 4

Try this -

dt.ToString("o"); dt.ToString("O");

you can see this link

hope this helps

Answer 5

You can use date in this format :(" yyyy-MM-ddThh:mm:ss.000Z ")

Or in manually by changing the time zone you can easily use the date set time zone to ( GMT:000(Greenwich mean time) ) in your setting tab and make sure data type is date/time.

Answer 6

使用yyyy表示年份，使用dd表示日期

  string result = dt.ToString("yyyy-MM-ddThh:mm:ss.SSSZ");

Answer 7

这是快速解决方案：

DateTime.UtcNow.ToString("yyyy-MM-ddThh:mm:ss.fffZ")