VB.NET IsNull?

in vb6 there was IsNull()... is there a replacement in vb.net?

   - Marc
LVL 1
MarcGraffAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

appariCommented:
there is no direct function as in VB 6.

but there are few otherways of checking for null. like check whether the variable is nothing or using dbNull. here is an example which i use in my .net projects, code is from http://www.freevbcode.com/ShowCode.Asp?ID=5810

    Enum enumObjectType
        StrType = 0
        IntType = 1
        DblType = 2
    End Enum

Public Function CheckDBNull(ByVal obj As Object, _
    Optional ByVal ObjectType As enumObjectType = enumObjectType.StrType) As Object
        Dim objReturn As Object
        objReturn = obj
        If ObjectType = enumObjectType.StrType And IsDBNull(obj) Then
            objReturn = ""
        ElseIf ObjectType = enumObjectType.IntType And IsDBNull(obj) Then
            objReturn = 0
        ElseIf ObjectType = enumObjectType.DblType And IsDBNull(obj) Then
            objReturn = 0.0
        End If
        Return objReturn
 End Function

you can change above function to suit your needs.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
MarcGraffAuthor Commented:
Wow! Works great! Thanks!

   - Marc
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Visual Basic Classic

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.