I have a form that builds programatically based on certain conditions. When I click submit to input the data entered into the database I get this error message:
Object reference not set to an instance of an object.
on this line:
dbComm.Parameters("category").Value = drpDwnCategory.SelectedValue

Also note that I have split up the form because it's long into panels. panel1 gets the first 7 questions, panel2 gets the next 7 and panel3 gets the final 8 questions. I'm sending the form controls to 2 placeholders. The final 8 questions are the same for every form so I just added them in the panel3 and they are not programably built. The values from panel3 can be retrieved.

Is there something I need to do for the programmably built controls to make sure they are maintained throughout the form?

r they in deffrent pages or u just parted them by ur panels? if so, do u save the previous page's items??

Always:),
Hovik Melkomian.

I set their visible property to false and the next panel to true like this:

Dim pnlPanel As Panel
Dim strPanelName As String

' Hide Previous Panel
strPanelName = "pnlForm" & ViewState("CurrentPage")
pnlPanel = FindControl(strPanelName)
pnlPanel.Visible = False

' Show Current Panel
ViewState("CurrentPage") += 1
strPanelName = "pnlForm" & ViewState("CurrentPage")
pnlPanel = FindControl(strPanelName)
pnlPanel.Visible = True

When you say save do you mean update the database with the info?

i still dont know ur project style? do u use more than 1 page or not?!

Always:),
Hovik Melkomian.

It's only one page.

It seems ur script is wrong! Shouldnt u use
dbComm.Parameters("category").Value = drpDwnCategory.SelectedItem.Value;
if u have filled Text & value of ur DropDownList?!

keep in touch.

Always:),
Hovik Melkomian.

That didn't work. There are 20 possible combinations of questions and when i first started trying to code it I created 20 pages and built the form by hand and it worked. But I wanted one page to accomplish it but the error was returned when submit was clicked.

So, I wondering if building controls there is one step that I left out.

Here is a snipit of code from the Form Builder:

Select Case strQuestion.ToUpper
Case "Please Select a Category.".ToUpper
     Dim myQuestion As New Label
     myQuestion.Text = strQuestion & "<br>"

     Dim myCategory As New DropDownList
     myCategory.ID = "drpDwnCategory"
     myCategory.Items.Add("No")

     myCatHolder.Controls.Add(myQuestion)
     myCatHolder.Controls.Add(myCategory)
Case "Approximately how many square feet is your project?".ToUpper
     Dim myQuestion As New Label
     myQuestion.Text = "<br><br>" & strQuestion & "<br>"

     Dim myTextBox As New TextBox
     myTextBox.ID = "txtSquareFt"
     myTextBox.Width = New Unit(100)

     myCatHolder.Controls.Add(myQuestion)
     myCatHolder.Controls.Add(myTextBox)

If it goes into Panel2 the 'myCatHolder' changes to 'myCatHolder2'

i.e.
myCatHolder2.Controls.Add(myQuestion)
myCatHolder2.Controls.Add(myTextBox)

- Where are you building the controls (in what function, what point of the page execution)?
- How and at what point in execution are the controls reaching their final parent control? This may have a great impact on the problem.

Peter
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Work smarter, not harder.

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        If Not IsPostBack Then
            ViewState("CurrentPage") = 1
            Label1.Text = getCategory()
        End If
        getQuestions()
        'getCats()
    End Sub

getCategory executes first and returns a single text like Additions.
getQuestions takes 'Additions' and pulls all questions related to 'Additions' and adds them to the form panels. The controls are reaching the myCatHolder1 and 2 when the functions runs. myCatHolder1 and 2 reside in panel 1 and 2 respectively. If you need me to post the code let me know.