is nothing

[SimonZ]

I have function:
Protected Function func(byVal param as object)

My param is null ( I get system.dbnull from database)

But when I check:

If not param is nothing then
'this is always executed
end if

my if is executed.

Why?

if param = null than is nothing should work?

thanks,S

 

[Eliyahu Goldin]

Because null and System.DBNull are two different things. You should check param for not being equal to System.DBNull.

Eliyahu
I have function:
Protected Function func(byVal param as object)

My param is null ( I get system.dbnull from database)

But when I check:

If not param is nothing then
'this is always executed
end if

my if is executed.

Why?

if param = null than is nothing should work?

thanks,S