ArgumentNullException: Value cannot be null. (Parameter 's')

Question

I am trying to pull data from the table which has a DateTime data type with NULL values.
I am trying to get the required data by using the below method. However, it's throwing an error : ArgumentNullException: Value cannot be null. (Parameter 's')

TermDate = s.TermDate.HasValue ? s.TermDate : DateTime.Parse(s.TermDate.ToString().Replace(null, "-"))

Property: public DateTime? TermDate { get; set; }

Please advise.

Naimish Makwana · Answer

The issue here is that you’re trying to call ToString() on a null value. When s.TermDate is null , s.TermDate.ToString() will throw an ArgumentNullException . If you want to assign a default value when s.TermDate is null , you can do so directly in the ternary operator without calling ToString() or Replace() . Here’s how you can do it: TermDate = s.TermDate.HasValue ? s.TermDate.Value : new DateTime(1900, 1, 1); In this code, if s.TermDate has a value, it will be assigned to TermDate . If s.TermDate is null , then TermDate will be assigned a default date (in this case, January 1, 1900). You can replace new DateTime(1900, 1, 1) with any default date you prefer. Thanks

Amit Mohanty · Answer

You should check if s.TermDate is null before trying to access its value. TermDate = s.TermDate.HasValue ? s.TermDate : (s.TermDate != null ? DateTime.Parse(s.TermDate.ToString().Replace(null, "-")) : (DateTime?)null);

Rohini Parade · Answer

Here, Add null check for your object 's'. TermDate is null then provide any standard date according to business or default(DateTime);

Rafnas T P · Answer

Hi, You can try below code string TermDate = s?.TermDate?.ToString()?? "-"; if termdate is null then string will display as - else will show the date.

Sam Hobbs · Answer

You are checking s.TermDate but not s . The error message is saying that there is no s . You need to ensure that s is not null .

Jaimin Shethiya · Answer

Hello Satish, Please try with the below statement. TermDate = s.TermDate.HasValue ? s.TermDate : DateTime.Parse(Convert.ToString(s.TermDate).Replace(null, "-")) Thanks