String was not recognized as a valid datetime format

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I have date as int, which I'm taking it from the filename and time from the file field as a string.

I'm trying to get the expected output as per the string format. I'm getting error that string was not recognized as a valid datetime format

Any help is appreciated, Thank you in advance.

What I have tried:

C#

DateTime DTTM; 
int crdt = 20180418; 
string time = "15:20:37.6789" ;
 DTTM = DateTime.ParseExact(crdt + " " + time, "yyyy-MM-dd HH:mm:ss.FFFF tt", CultureInfo.InvariantCulture);

Expected output : 2018-04-18 15:20:37.6789 PM

Posted 5-Jun-18 5:09am

Member 13801408

Updated 5-Jun-18 5:33am

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Member 13812021 5-Jun-18 11:29am

Is there a reason you are separating them? Where are the "crdt" and "time" coming from?

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Ravi Bhavnani · Answer 1 · 2018-06-05T05:27:00

Solution 1

Clearly your string doesn't match your format. Don't you want to use this format instead?

yyyyMMdd HH:mm:ss.FFFF

/ravi

Posted 5-Jun-18 5:27am

Ravi Bhavnani

MadMyche · Answer 2 · 2018-06-05T05:35:00

DateTime.ParseExact() does not have a method that takes accepts an INT as an argument
System.DateTime.ParseExact [^]

Some methods don't like an INT within the method even though it gets concatenized into a string when executed.

Best bet would be to stringify ahead of time, perhaps this would work:

C#

DateTime DTTM; 
int crdt = 20180418; 
string time = "15:20:37.6789" ;

// new
string timestring= crdt.ToString() + time;

// altered
DTTM = DateTime.ParseExact(timestring, "yyyyMMdd HH:mm:ss.FFFF", CultureInfo.InvariantCulture);