Parameter has no default value if previous param is null?

Question

I have this query which seems to work unless I try to pass a null value in a parameter:

using (OleDbCommand com = new OleDbCommand(\"INSERT INTO [GROUP] ([Gr         


        

Answer 1

Parameters with a .Value of null are not passed. At all.

You need to pass DBNull.Value instead to pass a semantic null. For example:

com.Parameters.Add("@p7", OleDbType.Char, 255).Value =
         ((object)values7[0]) ?? DBNull.Value;

(etc)

And yes: I agree that this is ridiculous