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

I created an extension method to battle this problem. Marcin's suggestion is also worth considering if you can update the stored procedure.

cmd.Parameters.AddString("@MyParamName", myValue);


public static class SQLExtension
{
    public static void AddString(this SqlParameterCollection collection, string parameterName, string value)
    {
        collection.AddWithValue(parameterName, ((object)value) ?? DBNull.Value);
    }
}