Handling events of dynamically created controls in asp.net - asp.net

Question

I have a button which is not created dynamically. When I click on that button the number of lines in a textbox are counted. I store that in the variable called count. Depending on value of count I create buttons in panel.
Up to now it is working properly.
Now the click event of those buttons is not firing.
I have tried to google my question. But everywhere I got the same answer. Create the controls in Page_Init event. But how is it possible? I am getting the value of count from a textfile's lines, and that value of count decides how many button will be created in the panel.
Dim btnAllow As New Button
btnAllow.Text = "Allow"
btnAllow.ID = "btA" & x
AddHandler btnAllow.Click, AddressOf btnAllow_Click
btnAllowList.Add(btnAllow)
tdAllow.Controls.Add(btnAllow)
The code for btnAllow_Click
Protected Sub btnAllow_Click(ByVal sender As Object, ByVal e As System.EventArgs)
For x As Integer = 0 To btnAllowList.Count - 1
If sender.ID.SubString(3) = btnAllowList(x).ID.Substring(3) Then
Dim lineCount = IO.File.ReadAllLines(PendingRequestsPath).Length
Dim reader As New System.IO.StreamReader(DocumentViewersPath)
Dim allLines As New List(Of String)
Do While Not reader.EndOfStream
allLines.Add(reader.ReadLine())
Loop
reader.Close()
Dim DocumentViewerAlreadyExists As Boolean = False
For i As Integer = 0 To lineCount - 1
If ReadLine(i, allLines) = lblRequestorsList(x).Text Then
DocumentViewerAlreadyExists = True
Exit For
End If
Next
If DocumentViewerAlreadyExists = False Then
Dim Writer As System.IO.StreamWriter = IO.File.AppendText(DocumentViewersPath)
Writer.WriteLine(lblRequestorsList(x).Text)
End If
Dim line As String = ""
Dim r As IO.StreamReader = IO.File.OpenText(PendingRequestsPath)
Dim strFile As New ArrayList
While r.Peek <> -1 ' Loop through the file
line = r.ReadLine 'Read the next available line
' Check to see if the line contains what you're looking for.
' If not, add it to an ArrayList
If Not line.Contains(lblRequestorsList(x).Text) Then
strFile.Add(line)
End If
r.Close()
' Because we want to replace the content of the file, we first
' need to delete it.
If IO.File.Exists(PendingRequestsPath) Then
IO.File.Delete(PendingRequestsPath)
End If
' Create a StreamWriter object with the same filename
Dim objWriter As New IO.StreamWriter(PendingRequestsPath, True)
' Iterate through the ArrayList
For Each item As ArrayList In strFile
objWriter.WriteLine(item) ' Write the current item in the ArrayList to the file.
Next
objWriter.Flush()
objWriter.Close()
End While
End If
Next
End Sub

Answer 1

This worked for me:
Protected Sub Button1_Click(sender As Object, e As System.EventArgs) Handles Button1.Click
Dim NumberOfControls As Integer = 10
Session("CreateControls") = NumberOfControls
End Sub
Protected Sub btnAllow_Click(ByVal sender As Object, ByVal e As System.EventArgs)
'This will be executed when clicking on the newly created buttons.
End Sub
Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load
If Session("CreateControls") IsNot Nothing Then
For x As Integer = 0 To Convert.ToInt32(Session("CreateControls"))
Dim btnAllow As New Button
btnAllow.Text = "Allow"
btnAllow.ID = "btA" & x
AddHandler btnAllow.Click, AddressOf btnAllow_Click
Panel1.Controls.Add(btnAllow)
Next
End If
End Sub