Question

I have an optional field in a database that I’m pulling out using a DAO Record Set. I need to check whether or not the field is set before I concatenate it with other fields. So far I have the following code snippet which I’ve tried with both Is and = (that’s the obviously wrong syntax [[Is | =]]) to no avail. It appears that if I use = it will not correctly compare with Null and if I use Is then it complains that it’s not comparing with an Object.

While Not rs.EOF     If rs.Fields('MiddleInitial') [[Is | =]] Null Then thisMiddleInitial = '' Else thisMiddleInitial = rs.Fields('MiddleInitial')     If prettyName(myLastName, myFirstName, myMiddleInitial) = prettyName(rs.Fields('LastName'), rs.Fields('FirstName'), thisMiddleInitial) Then         MsgBox 'Yay!'     End If     rs.MoveNext Wend 

If there’s a simpler way to do this I’m totally open to it. prettyName takes 3 Strings as parameters and initially I was just trying to pass rs.Fields(‘MiddleName’) directly but it threw up at a Null value. I’d prefer to do something more direct like that but this is the best I could come up with.

Answer 1

How about:

IsNull(rs.Fields('MiddleInitial').Value) 

You could also have a look at this article which has some explanation about Null values in Access VBA apps and how to handle them.