AjaxToolkit control Extenders in a composite web control

Question

I am writing a bunch of controls for a Toolkit of controls and each control needs to use the various controls like the CollapsiblePanelExtender, RoundedCornerExtender, popup window extender etc. But since I am using the Web Control and inheriting from the Composite control but upon rendering if I try to render the extenders, it makes the panel disappear all together. but if I just add the controls in the CreateChildControls(), they appear but the collapse/expand does not work. Also the Rounded corners doesn't work as well. Not sure what I am doing wrong as rendering the extenders does not work and adding the controls to the updatepanel does nothing.

Any help is appreciated. I've attached the code here:

---

Imports System Imports System.IO Imports System.Web Imports System.Web.UI

''' ''' IUpdatePanelContainer Interface ''' ''' Public Interface IUpdatePanelContainer Sub RenderUpdatePanel(ByVal writer As HtmlTextWriter) End Interface

''' ''' CustomTemplateControl Class ''' ''' Public Class CustomTemplateControl Inherits Control

Private container As IUpdatePanelContainer

Sub New(ByVal container As IUpdatePanelContainer)
    Me.container = container
End Sub

Protected Overrides Sub Render(ByVal writer As System.Web.UI.HtmlTextWriter)
    container.RenderUpdatePanel(writer)
End Sub

End Class

''' ''' CustomUpdatePanel Class ''' ''' Public Class CustomUpdatePanel Inherits UpdatePanel

Private container As IUpdatePanelContainer

Sub New(ByVal container As IUpdatePanelContainer)
    Me.container = container
End Sub

Protected Overrides Function CreateContentTemplateContainer() As System.Web.UI.Control
    Return New CustomTemplateControl(container)
End Function

End Class

---

Composite Control

Public Class ProfileManagement Inherits CompositeControl Implements INamingContainer Implements IUpdatePanelContainer

Region "Overridden Events"

    Protected Overrides Sub OnInit(ByVal e As System.EventArgs)
        MyBase.OnInit(e)
        ' Create the main grid with the expandable panel and the inner table with the profile rows
        CreateGridTable()
        ' Add the Buttons at the end of the Authentication Control based on the PaymentOption set
        CreateButtonControls()
        ' Add the Back/Next buttons and the powered-by image
        CreateFooterControls()
    End Sub

    Protected Overrides Sub CreateChildControls()
        Controls.Clear()
        upd = New CustomUpdatePanel(Me)
        upd.ContentTemplateContainer.Controls.Add(pnlMain)
        upd.ContentTemplateContainer.Controls.Add(pnlButtons)
        upd.ContentTemplateContainer.Controls.Add(pnlFooter)
        upd.ContentTemplateContainer.Controls.Add(roundedCornetEx)
        upd.ContentTemplateContainer.Controls.Add(colPanelExdr)
        'pnlMain.Controls.Add(roundedCornetEx)
        'pnlMain.Controls.Add(colPanelExdr)

        Me.Controls.Add(upd)
        'Me.Controls.Add(roundedCornetEx)
        'Me.Controls.Add(colPanelExdr)
    End Sub

End Region

Region "IUpdatePanelContainer Members"

    Public Sub RenderUpdatePanel(ByVal writer As HtmlTextWriter) Implements IUpdatePanelContainer.RenderUpdatePanel

        'roundedCornetEx.RenderControl(writer)
        'colPanelExdr.RenderControl(writer)
        pnlMain.RenderControl(writer)
        pnlButtons.RenderControl(writer)
        pnlFooter.RenderControl(writer)


    End Sub

End Region

Region "Private Methods"

    Private Sub CreateGridTable()
        Dim tRow As New TableRow()
        Dim tCol As New TableCell()

        pnlMain = New Panel()
        pnlMain.ID = "pnlMain"
        pnlMain.Width = Unit.Percentage(100)
        tblMain = New Table()
        tblMain.Width = Unit.Percentage(100)
        pnlMain.Controls.Add(tblMain)

        roundedCornetEx = New AjaxControlToolkit.RoundedCornersExtender()
        roundedCornetEx.TargetControlID = "pnlMain"
        roundedCornetEx.Radius = 6
        roundedCornetEx.Corners = AjaxControlToolkit.BoxCorners.All
        roundedCornetEx.ClientState = True

        tCol.Width = Unit.Percentage(80)
        tCol.HorizontalAlign = HorizontalAlign.Left
        hlnkbtnHeader = New LinkButton()
        hlnkbtnHeader.ID = "hlnkbtnHeader"
        hlnkbtnHeader.Text = "Payment Profiles"

        lblColPanel = New Label()
        lblColPanel.CssClass = "txtlabel"
        lblColPanel.ID = "lblColPanel"
        lblColPanel.Text = "(Hide Payment Profiles..)"

        tCol.BackColor = Drawing.Color.WhiteSmoke
        tCol.Controls.Add(hlnkbtnHeader)
        tCol.Controls.Add(New LiteralControl(" "))
        tCol.Controls.Add(New LiteralControl(" "))
        tCol.Controls.Add(lblColPanel)
        tRow.Cells.Add(tCol)

        tCol = New TableCell()
        tCol.HorizontalAlign = HorizontalAlign.Right
        tCol.Width = Unit.Percentage(20)
        tCol.BackColor = Drawing.Color.WhiteSmoke
        imgAscDesc = New Image()
        imgAscDesc.ID = "imgAscDesc"
        imgAscDesc.ImageUrl = "desc.gif"

        tCol.Controls.Add(imgAscDesc)
        tRow.Cells.Add(tCol)
        tblMain.Rows.Add(tRow)

        tRow = New TableRow()
        tCol = New TableCell()
        tCol.ColumnSpan = 2 : tCol.HorizontalAlign = HorizontalAlign.Left
        tCol.Width = Unit.Percentage(100)
        tCol.Controls.Add(CreateInnerTable())
        tRow.Cells.Add(tCol)
        tblMain.Rows.Add(tRow)

        ' CollapsiblePanel Extender
        colPanelExdr = New AjaxControlToolkit.CollapsiblePanelExtender()
        colPanelExdr.ID = "cpe" : colPanelExdr.TargetControlID = pnlMain.ClientID
        colPanelExdr.CollapsedSize = 0 ' colPanelExdr.ExpandedSize = 300
        colPanelExdr.Collapsed = True
        colPanelExdr.ExpandControlID = hlnkbtnHeader.ClientID
        colPanelExdr.CollapseControlID = hlnkbtnHeader.ClientID
        colPanelExdr.AutoCollapse = False : colPanelExdr.AutoExpand = False
        colPanelExdr.ScrollContents = True
        colPanelExdr.TextLabelID = lblColPanel.ClientID
        colPanelExdr.CollapsedText = "(Show Payment Profiles..)" : colPanelExdr.ExpandedText = "(Hide Payment Profiles..)"
        colPanelExdr.ImageControlID = imgAscDesc.ClientID
        colPanelExdr.ExpandedImage = "styles/style_7/desc.gif" : colPanelExdr.CollapsedImage = "styles/style_7/asc.gif"
        colPanelExdr.ExpandDirection = AjaxControlToolkit.CollapsiblePanelExpandDirection.Vertical
        colPanelExdr.ClientState = True


    End Sub

End Region

End Class