Hi!
I was trying to use the ?? operator with an DBDatareader. eg:
long lValue = Convert.ToInt32(objReader["ParentID"] ?? -1);
which throws the following exception:"... Object cannot be cast from DBNull to other types."
I think the reason is, that DBNull.Value isn′t actually null. Therefore I changed my code to:
long lValue = objReader["ParentID"] != DBNull.Value ? Convert.ToInt32(objReader["ParentID"]) : -1;
Is there a better way of doing this ? Can one use the ?? operator with a Datareader anyway?
Thanks for your help!
PS: sorry for my poor english.
Hi,
the ?? operator is used in conjunction with nullable types. The way you wrote it using the ?: operator is just fine.
Grz, Kris.
|||Thanks a lot!
