dynamic checkbox list challenge galore

[segue]

I'm dynamically creating/populating a checkbox list and adding it to a web
form.
I want to when checking an item in the list have the autopostback retrieve
the
selected item.

I'm dynamically adding that control as:
Protected WithEvents userSelectionLi st, Ulist2 As
System.Web.UI.W ebControls.Chec kBoxList
Protected WithEvents checkboxcontain er As PlaceHolder

For i = 0
Dim selectedItem As New ListItem(appstr ing, appstring)
'selectedItem.S elected = True
userselectionli st.Items.Add(se lectedItem)
Next i

checkboxcontain er.Controls.Add (userselectionl ist)

etc..
td1.Controls.Ad d(checkboxconta iner)
tr1.Controls.Ad d(td1)
table1.Controls .Add(tr1)
form1.Controls. Add(table1)

My asp looks something like this:

<form id="Form1" method="post" runat="server">
<asp:Table Runat="server" ID="Table1">
<asp:TableRow ID='appinfo' Visible=false Width='250'>
<asp:TableCel l ID='appname' Visible=true ColumnSpan="1"
HorizontalAlign ="Right">
<br>
<asp:Literal id="mySelection s" Runat="server"> </asp:Literal>
<asp:PlaceHolde r ID="checkboxcon tainer" Runat="server" />
<asp:CheckBoxLi st ID="mylist" Runat="server" />
<br>
</asp:TableCell>
</asp:TableRow>

And retrieving the list on the postback which I'm calling in page_init:

Sub apppb()
Dim i, x As Integer

'Dim userSelectionLi st As New CheckBoxList
userSelectionLi st = CType(form1.Fin dControl("mylis t"), CheckBoxList)
Ulist2 = CType(form1.Fin dControl("mylis t"), CheckBoxList)
Try
For x = 0 To Ulist2.Items.Co unt - 1
If Ulist2.Items(x) .Selected = True Then
results.Text += Ulist2.Items(x) .Value
'mySelections.T ext += userSelectionLi st.Items(x).Val ue

End If
Next x
Catch ex As Exception

End Try
End Sub

Yet no value for the selected item.

Please help. I've used dynamic controls before and I think
maybe there may be a problem when I redeclare the control
for viewstate on the postback i.e.:

There are some complications in finding the checkboxlist control maybe because
it's binded to a placeholder - checkboxcontain er.

My page init looks something like:

InitializeCompo nent()
If Not IsPostBack Then
buildform(sende r, e)
Else

'userSelectionL ist = New CheckBoxList
'checkboxcontai ner = New PlaceHolder
'userSelectionL ist = CType(form1.Fin dControl("mylis t"),
CheckBoxList)
'checkboxcontai ner.Controls.Ad d(userSelection List)
'checkcontainer ()
buildform(sende r, e)
apppb()

End If

Can someone get this scenario to work?

Regards;

tjt:

[Ryan Ternier]

segue,

In the CBL's properties, set AutoPostBack = true

As well, you will want to set up a server side event that is called
whenever a user clicks the checkbox (the click event). THis way you can
get the sender, and the EventArgs from the postback and figure out what
Item called the post back.

/RT
segue wrote:

I'm dynamically creating/populating a checkbox list and adding it to a web
form.
I want to when checking an item in the list have the autopostback retrieve
the
selected item.

I'm dynamically adding that control as:
Protected WithEvents userSelectionLi st, Ulist2 As
System.Web.UI.W ebControls.Chec kBoxList
Protected WithEvents checkboxcontain er As PlaceHolder

For i = 0
Dim selectedItem As New ListItem(appstr ing, appstring)
'selectedItem.S elected = True
userselectionli st.Items.Add(se lectedItem)
Next i

checkboxcontain er.Controls.Add (userselectionl ist)

etc..
td1.Controls.Ad d(checkboxconta iner)
tr1.Controls.Ad d(td1)
table1.Controls .Add(tr1)
form1.Controls. Add(table1)

My asp looks something like this:

<form id="Form1" method="post" runat="server">
<asp:Table Runat="server" ID="Table1">
<asp:TableRow ID='appinfo' Visible=false Width='250'>
<asp:TableCel l ID='appname' Visible=true ColumnSpan="1"
HorizontalAlign ="Right">
<br>
<asp:Literal id="mySelection s" Runat="server"> </asp:Literal>
<asp:PlaceHolde r ID="checkboxcon tainer" Runat="server" />
<asp:CheckBoxLi st ID="mylist" Runat="server" />
<br>
</asp:TableCell>
</asp:TableRow>

And retrieving the list on the postback which I'm calling in page_init:

Sub apppb()
Dim i, x As Integer

'Dim userSelectionLi st As New CheckBoxList
userSelectionLi st = CType(form1.Fin dControl("mylis t"), CheckBoxList)
Ulist2 = CType(form1.Fin dControl("mylis t"), CheckBoxList)
Try
For x = 0 To Ulist2.Items.Co unt - 1
If Ulist2.Items(x) .Selected = True Then
results.Text += Ulist2.Items(x) .Value
'mySelections.T ext += userSelectionLi st.Items(x).Val ue

End If
Next x
Catch ex As Exception

End Try
End Sub

Yet no value for the selected item.

Please help. I've used dynamic controls before and I think
maybe there may be a problem when I redeclare the control
for viewstate on the postback i.e.:

There are some complications in finding the checkboxlist control maybe because
it's binded to a placeholder - checkboxcontain er.

My page init looks something like:

InitializeCompo nent()
If Not IsPostBack Then
buildform(sende r, e)
Else

'userSelectionL ist = New CheckBoxList
'checkboxcontai ner = New PlaceHolder
'userSelectionL ist = CType(form1.Fin dControl("mylis t"),
CheckBoxList)
'checkboxcontai ner.Controls.Ad d(userSelection List)
'checkcontainer ()
buildform(sende r, e)
apppb()

End If

Can someone get this scenario to work?

Regards;

tjt: