How to retrieve back editable values in textboxes added in PlaceHolder?

I'm a newbie here and I'm stuck with the coding. So far I've created 3 buttons, first button is to load the values in textboxes added to placeholder. Then button2 is to extract the data from button 1 and display out. Now the 3rd step, I want to edit the values from the textboxes, after edit, how do I grab and display out the new values in label and textboxes?

Code:

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Partial Class _Default
    Inherits System.Web.UI.Page

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim x As Integer = 1
        Dim message As String

        For x = 1 To 36
            Dim txt As New TextBox
            'txt.ID = "Text" & ViewState("COUNT")
            txt.ID = "Text" & x
            txt.Text = x.ToString
            PlaceHolder1.Controls.Add(txt)
        Next


        For x = 1 To 36
            Dim stxt As String = "Text" & x.ToString
            Dim txtxx As TextBox = TryCast(PlaceHolder1.FindControl(stxt), TextBox)
            If txtxx IsNot Nothing Then
                'There's your textbox value.
                message = message & txtxx.Text & ","
            End If
        Next
        'Label1.Text = message
        Session("message") = message
    End Sub

Protected Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click

        Label1.Text = Session("message")

        Dim x As Integer
        Dim message As String = ""

        For x = 1 To 36
            Dim txt As New TextBox

            txt.ID = "Text" & x
            txt.Text = x.ToString
            PlaceHolder1.Controls.Add(txt)
        Next

        For x = 1 To 36
            Dim stxt As String = "Text" & x.ToString
            Dim txtxx As TextBox = TryCast(PlaceHolder1.FindControl(stxt), TextBox)
            If txtxx IsNot Nothing Then
                'There() 's your textbox value.
                message = message & txtxx.Text
            End If
        Next

    End Sub

    Protected Sub Button3_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button3.Click

    End Sub

End Class

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Hello,

The first thing that I would have to ask for is the use case for what you are trying to do.

Although you "can" add controls to the page dynamically at runtime, it has to be understood that there are complexities involved in doing this in terms of maintaining those controls across postbacks, viewstate, etc. I would encourage you to read this article:

http://www.4guysfromrolla.com/articles/092904-1.aspx

To gain a better understanding of those complexities.

Once you have read that, and you still want to continue down this route, we can then extend the conversation.

Gary