Retrieve value from a dynamically created control inside an UpadetPanel

I would like to dynamically create some controls - tablecells, textboxes, and dropdownlists inside an AJAX UpdatePanel.
How would I retrieve the values that user enters into these controls in my vb.net code behind?
Can you please provide vb.net sample code ??

Here is my code:

'creates the textboxes - works fine

For i = 1 To intUnseatedGuestCount
Dim txtFirstName As New TextBox
txtFirstName.ID = "txtFirstName" + i.ToString
Me.tdNewSeatingCards.Controls.Add(txtFirstName)
Next

'code to retreive the values - produces an error message

Object reference not set to an instance of an object

For i = 1 To Me.hidNewSeatingCardCount.value
strTXTName = "txtFirstName" + i.ToString
Dim myTXT As TextBox = CType(Me.tdNewSeatingCards.FindControl("txtFirstName" + i.ToString), TextBox)
strTest += myTXT.Text + "<br>"
Next

Thank you for your help

You are creating controls dynamically, So on every postback (even in asynchronous postbacks ) you have to create it

OK Here is my code to recreate the controls:

For i = 1 To Me.hidNewSeatingCardCount.Value
Dim txtFirstName As TextBox = CType(Me.tdNewSeatingCards.FindControl("txtFirstName" + i.ToString), TextBox)
txtFirstName.ID = "txtFirstName" + i.ToString
Me.tdNewSeatingCards.Controls.Add(txtFirstName)
strTest += CType(Me.tdNewSeatingCards.FindControl("txtFirstName" + i.ToString), TextBox).Text
Next

There are no error messages, but I am not getting the values that the user enters into the textbox.

Thank you

Hi,

Thank you for your post!

You should place your recreate code in the init event.

The cause of the issue is viewstate process is finished before you recreate your controls!

If you have further questions,let me know!

Best Regards,