Listbox does not appear in Request.Form

[Mr Newbie]

DropDown lists and Listboxes do not appear in the list of controls and
values passed back to the server on PostBack in Request.Form object. Can
someone confirm this to be correct and possibly answer why ?

The impact of this is that values added via javascript will never make it
back to the server side code unless one does some jiggery pokery with hidden
fields etc. If this is true, then I would like to understand the reason
behind the design decision and if this has been addressed in VS2005 ?
Cheers - Mr N

[Mr Newbie]

I found another way around this. If you hijack the form submit, you can
select all members of the ListBox and then submit the code, this is only any
good if you dont want to select a single item from the list. Otherwise your
hidden field idea is the only way forward.

Private Sub Button1_Click(B yVal sender As System.Object, ByVal e As
System.EventArg s) Handles Button1.Click

If IsPostBack Then

Dim col As System.Collecti ons.Specialized .NameValueColle ction

Dim listItemsArray( ) As String

Dim strListItems As String

col = Request.Form

strListItems = col.Item("ListB ox1")

listItemsArray = strListItems.Sp lit(",")

ListBox1.Items. Clear()

For Each s As String In listItemsArray

ListBox1.Items. Add(s)

Next



End If


"Karl Seguin" <karl REMOVE @ REMOVE openmymind REMOVEMETOO . ANDME net>
wrote in message news:%2******** ********@TK2MSF TNGP14.phx.gbl. ..

No, I think you are right about that part :) i could look into it, but
let's say you are...can't think of how else it would do it ...nice catch!

Karl

--
MY ASP.Net tutorials
http://www.openmymind.net/
"Mr Newbie" <he**@now.com > wrote in message
news:eq******** ******@TK2MSFTN GP14.phx.gbl...

OK, that makes sense I suppose. Presumably though viewstate is used with
textboxes to determine and fire the text changed event by comparing the
text before and that which is preserved in viewstate, or do I have that
wrong as well.

I dont seem to be doing very well today!

Cheers Mr N

Just to clarify in addition to my post...TextBoxe s don't work like you
think they do with ViewState. The value of a textbox isn't preserved
via ViewState. Since there's only 1 value and HTML specifications say
that the value has to be passed via REquest.Form, it would be foolish
for ASP.Net to also maintain it in ViewState (waste of space).

ViewState is used where/when Request.Form can't. Namely for controls
that don't participate in the form submission (datagrid for example) as
well as controls who only partially participate in form submission (only
the selected radio input gets passed).