Hi,

I create 5 dropdownlist in code-behind. I want to insert their selectedvalues in a table by making a string separated with ":"
I can get their selecedvalues but i'm stuck when i want to execute the insert.
The error is "name dd is not declared" (in line: selvalue = selvalue & Session("dd" & dd.id) & ":"

Any idea how to solve this?
Thanks for help
H.

Dim dd() As DropDownList
Dim i As Integer

for i= 1 to 5
dd(i) = New DropDownList
dd(i).ID = id 'can be anything
next

For Each d As DropDownList In dds
AddHandler d.SelectedIndexChanged, AddressOf dropd
Next

Protected Sub dropd(ByVal sender As Object, ByVal e As System.EventArgs)
Dim dd As DropDownList = CType(sender, DropDownList)
Session("dd" & id) = dd.SelectedValue
End Sub

Protected Sub submit_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Dim i As Integer
Dim selvalue As String
For i = 1 To 5
selvalue = selvalue & Session("dd" & dd.id) & ":"
Next
sql="insert ....."
...

Couple of problems here. First the variable dd is out of scope of your Submit_Click method. (I am assuming the code where you populate the array is in another method, the Page_Load perhaps?) Since you are dynamically creating teh controls I can see why you keep building them, my suggestion would be to make dd a class level variable so that it has scope to all of the methods in your class.

Second, your loop won't achieve what you want it to. You should change your code to:
selvalue = selvalue & Session("dd" & dd(i).id) & ":"

hth.
-Doug

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Thanks for replying.
I think my explanation was not good enough. I ommitted some code to restrict the message.

This is the real problem: there are a unknown number of dropdownlist
(questions of a survey) (i took 5 as example) depending of the user who create the questions.
The dropdownlists (some are not visible) have the property AutoPostBack = true, because the value of dropdownlist x can make another further dropdownlist visible. So each time an user introduces a value, the depending DD will be visible or remains unvisible. This is solved.

Now, i want to collect all the selectedvalues and put them into a table. But i can't find a way to pass the collected selectedvalues in the submit procedure.


Friend dds As New List(Of DropDownList)
...
Dim dd() As DropDownList

For i = 1 To (number of dropdownlist)
dd(i) = New DropDownList
dd(i).ID = id 'id is the id of the related quesion in the table
dd(i).AutoPostBack = True
'fed from table
...
form1.Controls.Add(dd(i))
...

For Each d As DropDownList In dds
AddHandler d.SelectedIndexChanged, AddressOf dropd
Next

Protected Sub dropd(ByVal sender As Object, ByVal e As System.EventArgs)
Dim dd As DropDownList = CType(sender, DropDownList)
session(dd.ID)=dd.selectedValue
End Sub

Protected Sub submit_Click(ByVal sender As Object, ByVal e As
System.EventArgs)
[u]'how to get the selectvalue here?</u>
End Sub

Thanks