I use session:
If IsDBNull(Sessio n("Source")) Then ' this is the line cause an error
bindRptSell()
End If
But I get an error message:
Object variable or With block variable not set.
System.NullRefe renceException: Object variable or With block variable not
set.
Why? I check for null.
Simon
5  1759 
simon wrote: I use session:
If IsDBNull(Sessio n("Source")) Then ' this is the line cause an error
bindRptSell()
End If
But I get an error message:
Object variable or With block variable not set.
System.NullRefe renceException: Object variable or With block variable not
set.
Why? I check for null.
Simon
No, you check for "DbNull", which is DbNull.Value. This is *not* the
same as "null" (or "Nothing" in VB).
try:
If Session("Source ") Is Nothing Then ...
--
Hans Kesting
Thank you
regards,
Simon
"Hans Kesting" <ne***********@ spamgourmet.com > wrote in message
news:O%******** ********@tk2msf tngp13.phx.gbl. .. simon wrote: I use session:
If IsDBNull(Sessio n("Source")) Then ' this is the line cause an error
bindRptSell()
End If
But I get an error message:
Object variable or With block variable not set.
System.NullRefe renceException: Object variable or With block variable not
set.
Why? I check for null.
Simon
No, you check for "DbNull", which is DbNull.Value. This is *not* the same
as "null" (or "Nothing" in VB).
try:
If Session("Source ") Is Nothing Then ...
--
Hans Kesting
Hi,
Why do you check your session for DBNull???
DBNull is just for a database.
if(Session[''aaa'] == null)
just like that
bye
"simon" <si*********@st ud-moderna.si> wrote in message
news:e4******** *****@TK2MSFTNG P12.phx.gbl... I use session:
If IsDBNull(Sessio n("Source")) Then ' this is the line cause an error
bindRptSell()
End If
But I get an error message:
Object variable or With block variable not set.
System.NullRefe renceException: Object variable or With block variable not
set.
Why? I check for null.
Simon
Hi Michael,
If I use Session[''aaa'] =null I get the following error message:
'null' is not declared. 'Null' costant is no longer suported; use
'System.DBNull' instead.
So, that's way I'm using DBNull.
By the way, I'm writing in VB language. I heard that in C# that is possible,
to compare with null value.
Any comment?
Regards,
Simon
"Michael Tkachev" <m_*******@hotm ail.com> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. .. Hi,
Why do you check your session for DBNull???
DBNull is just for a database.
if(Session[''aaa'] == null)
just like that
bye
"simon" <si*********@st ud-moderna.si> wrote in message
news:e4******** *****@TK2MSFTNG P12.phx.gbl... I use session:
If IsDBNull(Sessio n("Source")) Then ' this is the line cause an error
bindRptSell()
End If
But I get an error message:
Object variable or With block variable not set.
System.NullRefe renceException: Object variable or With block variable not
set.
Why? I check for null.
Simon
C# uses "null".
VB uses "Nothing".
Try
If IsNothing(Sessi on("Source")) Then
....rest of code
End If
You could also set a variable equal to Session("Source ")
and then the code would look a bit cleaner :
Dim varSource as String=Session( "Source")
If IsNothing(varSo urce) Then
....rest of code
End If
Juan T. Llibre
ASP.NET MVP http://asp.net.do/foros/
Foros de ASP.NET en Español
Ven, y hablemos de ASP.NET...
=============== =======
"simon" <si*********@st ud-moderna.si> wrote in message
news:Ok******** ******@TK2MSFTN GP12.phx.gbl... Hi Michael,
If I use Session[''aaa'] =null I get the following error message:
'null' is not declared. 'Null' costant is no longer suported; use
'System.DBNull' instead.
So, that's way I'm using DBNull.
By the way, I'm writing in VB language. I heard that in C# that is
possible, to compare with null value.
Any comment?
Regards,
Simon
"Michael Tkachev" <m_*******@hotm ail.com> wrote in message
news:%2******** ********@tk2msf tngp13.phx.gbl. .. Hi,
Why do you check your session for DBNull???
DBNull is just for a database.
if(Session[''aaa'] == null)
just like that
bye
"simon" <si*********@st ud-moderna.si> wrote in message
news:e4******** *****@TK2MSFTNG P12.phx.gbl... I use session:
If IsDBNull(Sessio n("Source")) Then ' this is the line cause an error
bindRptSell()
End If
But I get an error message:
Object variable or With block variable not set.
System.NullRefe renceException: Object variable or With block variable
not
set.
Why? I check for null.
Simon
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