reference error when session expires

[TJS]

i get a reference error to CssDropDown object when the session expires

Why is object reference on "CssDropDown" not being found ?

========================================================
Exception Details: System.NullReferenceException:
Object reference not set to an instance of an object.

Source Line for Error:
....
cssNewStyle = CssDropDown.SelectedItem.value
...
==========================================================
html code is:

<aspropDownList
id="CssDropDown"
enableviewstate="true"
runat="server" >
</aspropDownList>

 

[Andy Mortimer [MS]]

You may need to provide more information concerning your setup, your code,
and when it happens etc.

Note this for Microsoft .NET Framework 1.0:-

http://support.microsoft.com/default.aspx?scid=kb;en-us;831382

 

[TJS]

I don't store sessions in SQL server and I'm using 1.1 framework .

I don't understand this problem, but I did manage a hack workaround by the
setting session timeout to 60 minutes and doing a page refresh every 50
minutes