Given string format is not valid in C#

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I get output as string "01-01-2013 00:00:00" now i want to convert into date

i used following format

row[colNum - 1] = temp.ToString();
DateTime d = DateTime.Parse(temp.ToString());   // giving me error
DateTime conv = DateTime.FromOADate(d);
string convT = d.ToString("dd/MM/yyyy");
convT = convT.Replace("-", "/");

Error: Giving input string is invalid format

What I have tried:

i tried following code also

DateTime d = DateTime.ParseExact(temp.ToString(), "MM/dd/yyyy hh:mm:ss tt", CultureInfo.InvariantCulture);

Posted 28-Jun-23 7:27am

Akshay malvankar

Updated 28-Jun-23 10:26am

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raddevus · Answer 1 · 2023-06-28T08:59:00

The following code works.

The convert to Double (commented out) does not work.

C#

string temp = "01-01-2013 00:00:00";
	DateTime d = DateTime.Parse(temp.ToString());   // giving me error
 	//DateTime conv = DateTime.FromOADate(d);
	string convT = d.ToString("dd/MM/yyyy");
	convT = convT.Replace("-", "/");
	Console.WriteLine(convT);

The output is:

01/01/2013

Also, the line

convT = convT.Replace("-", "/");

does not do anything. It's attempting to replace - with / and there are no dashes in the string.

Maybe you meant:

C#

string temp = "01-01-2013 00:00:00";
	DateTime d = DateTime.Parse(temp.ToString());   // giving me error
 	//DateTime conv = DateTime.FromOADate(d);
	string convT = d.ToString("dd/MM/yyyy");
	Console.WriteLine(convT);
	convT = convT.Replace("/", "-");
	Console.WriteLine(convT);

Output is:

01/01/2013
01-01-2013

If Parse is throwing an exception, it is likely that the string is not in any of numerous formats that Parse can deal with.

OriginalGriff · Answer 2 · 2023-06-28T10:26:00

TryParseExact is the way to go rather than Parse or ParseExact, but your format string doesn't match the date example you show:

string temp = "01-01-2013 00:00:00";

DateTime d = DateTime.ParseExact(temp.ToString(), "MM/dd/yyyy hh:mm:ss tt", CultureInfo.InvariantCulture);

Compare the two and you'll see what I mean:

01-01-2013 00:00:00
MM/dd/yyyy hh:mm:ss tt

Your format specifies a trailing AM/PM indicator which the date data does not provide.

Have a look here: Formatting a DateTime for display - format string description[^] - the format codes are the same for parsing.

Given string format is not valid in C#

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