C# ASP.Net Parameters.AddWithValue rejecting null value for parameter

Question

I am populating tables using a stored procedure. The table allows a \'null\' for the middle initial of the name, but I\'m getting the following error message:

Answer 1

You need to declare on everything - even if it's null.

Use DBNull.Value for MiddleInitial.

cmd.Parameters.AddWithValue("@MiddleInitial",DBNull.Value);