How can I format a nullable DateTime with ToString()?

by 
Console.WriteLine(dt2 != null ? dt2.Value.ToString("yyyy-MM-dd hh:mm:ss") : "n/a");

EDIT: As stated in other comments, check that there is a non-null value.

Update: as recommended in the comments, extension method: 

public static string ToString(this DateTime? dt, string format)
    => dt == null ? "n/a" : ((DateTime)dt).ToString(format);

And starting in C# 6, you can use the null-conditional operator to simplify the code even more. The expression below will return null if the DateTime? is null.

dt2?.ToString("yyyy-MM-dd hh:mm:ss")

More Related Contents:

  1. format date in c#
  2. What does “DateTime?” mean in C#?
  3. How can i format 07/03/2012 to March 7th,2012 in c# [duplicate]
  4. How to get nullable DateTime out of the database
  5. How do I use DateTime.TryParse with a Nullable?
  6. Parse DateTime with time zone of form PST/CEST/UTC/etc
  7. How can I round up the time to the nearest X minutes?
  8. DateTime “null” value
  9. Nullable type is not a nullable type?
  10. How do I get the last day of a month?
  11. Compare nullable types in Linq to Sql
  12. What is the easiest way to subtract time in C#?
  13. DateTime.TryParse century control C#
  14. Parse C# string to DateTime
  15. DateTime’s representation in milliseconds?
  16. Linq query with nullable sum
  17. Format date in C#
  18. insert datetime value in sql database with c#
  19. Convert String to Date in .NET if my incoming date format is in YYYYMMDD
  20. Where in memory are nullable types stored?
  21. DateTime conversion from string C#
  22. DateTime “null” / uninitialized value?
  23. Type result with conditional operator in C#
  24. What is the default value of the nullable type “int?” (including question mark)?
  25. Boxing / Unboxing Nullable Types – Why this implementation?
  26. Correct way to check if a type is Nullable [duplicate]
  27. Convert Date from Persian to Gregorian
  28. Serializing a Nullable in to XML
  29. Unix time conversions in C# [duplicate]
  30. Datetime format Issue: String was not recognized as a valid DateTime

Leave a Comment