Getting error: String reference not set to an instance of a String. Parameter name: s

Question

I am using this code to truncate datetime from my database into its year and time components. The variables YearOfRelease and Runtime contain datetime of the format "dd/MM/yyyy hh:mm:ss" It was working fine previously but its now giving the error:

String reference not set to an instance of a String. Parameter name: s

It could only be something wrong in the DateTime.ParseExact function, could anyone please let me know why 'null' is suddenly causing this problem when previously it was working perfectly?

    DateTime dt2 = new DateTime();


    dt = DateTime.ParseExact(YearOfRelease, "dd/MM/yyyy hh:mm:ss", null);

    Year = dt.Year.ToString();


    dt2 = DateTime.ParseExact(RunTime, "dd/MM/yyyy hh:mm:ss", null);
    string hour = dt2.Hour.ToString();
    string min = dt2.Minute.ToString();

    Time = hour + ":" + min;

Brian Geihsler · Accepted Answer · 2011-05-06 03:18:15Z

26

The first parameter of DateTime.ParseExact is a string parameter named 's'.

Therefore, it looks like YearOfRelease or RunTime is null in your program. Make sure those are set before you call DateTime.ParseExact.

answered May 6, 2011 at 3:18

Brian Geihsler

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2 Comments

QPTR Over a year ago

You mean in the database? Nope, they are not null, I just checked

QPTR Over a year ago

Thanks, I rechecked, there was something wrong in my c# code, the variables weren't getting the correct values.

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