converting c to vb/asp; isnull, isdbnull

[et]

How do you know when to use isnull, and isdbnull and how do you use them? I
have the following expression in C:
DataRowView drv = dataItem as DataRowView;

if (drv != null)
How do I convert this to VB? By using intellisense, the only option I have
is isdbnull(drv), but it's not a database, and there is no option for
drv.isnull or isnull(drv). How would I do this is vb? Thanks and excuse my
ignorance:

[Juan T. Llibre]

Try :
If Not drv Is Nothing Then
' drv refers to a valid object, ' so your code can use it.

End If

Juan T. Llibre
===========
"et" <ea*************@yahoo.com> wrote in message
news:OH**************@TK2MSFTNGP09.phx.gbl...

How do you know when to use isnull, and isdbnull and how do you use them?
I have the following expression in C:
DataRowView drv = dataItem as DataRowView;

if (drv != null)
How do I convert this to VB? By using intellisense, the only option I
have is isdbnull(drv), but it's not a database, and there is no option for
drv.isnull or isnull(drv). How would I do this is vb? Thanks and excuse
my ignorance: