c# - How to check if a DateTime field is not null or empty?

Question

(This question already has answers here): question from:https://stackoverflow.com/questions/21905733/how-to-check-if-a-datetime-field-is-not-null-or-empty

Answer 1

If you declare a DateTime, then the default value is DateTime.MinValue, and hence you have to check it like this:

DateTime dat = new DateTime();

 if (dat==DateTime.MinValue)
 {
     //unassigned
 }

---

If the DateTime is nullable, well that's a different story:

 DateTime? dat = null;

 if (!dat.HasValue)
 {
     //unassigned
 }