button in webcontrol added to datagrid event not firing

[flynny1st]

hi all,

hopefully you can help.

i have created a web control for my add to cart button. this is working fine in my static pages. however, i have a search page which hold a data grid. when the users searches it i want to add an instance of this add to cart button to the datagrid. however when i click the added button its not triggering the click event in the control. can someone explain why.

I've tried the following way

<asp:DataGrid 
OnEditCommand="ItemsGrid_Edit" 
CssClass="SearchBody" 
AlternatingItemStyle-BackColor="GhostWhite" 
id="search_datagrid" 
AutoGenerateColumns=False 
AllowPaging="True"
PageSize="20" 
OnItemCreated="DataGrid_ItemCreated"
OnPageIndexChanged="PageIndexChanged_Click"
PagerStyle-Mode="NumericPages"  
runat="server">

with my page_load event being

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        'If Not Page.IsPostBack Then

        oDataSet = CreateDataSource()
        Session("searchDataSet") = oDataSet

        If oDataSet.Tables(0).Rows.Count = 0 Then
            gridEmptyLabel.Text = "The search returned back no results"
            gridEmptyLabel.Visible = True
        Else
            search_datagrid.DataSource = oDataSet
            search_datagrid.DataBind()

            'add the addcart buttons here
            addCartButtonsToDataGrid(search_datagrid)
        End If

        'End If

    End Sub

and 

   Sub addCartButtonsToDataGrid(ByVal grid As DataGrid)

        For i = 0 To grid.Items.Count - 1

            Dim item As DataGridItem = grid.Items(i)
            Dim bPlaceHolder As PlaceHolder = item.FindControl("addToCartPlaceholder")

            Dim productID As Label = item.FindControl("productID")
            Dim productName As HyperLink = item.FindControl("productName")
            Dim sizeID As Label = item.FindControl("sizeID")
            Dim size As Label = item.FindControl("size")
            Dim flavours As DropDownList = item.FindControl("FlavourDropDown")
            Dim price As Label = item.FindControl("productPrice")
            Dim quantity As TextBox = item.FindControl("quantity")

            If item.ItemType = ListItemType.Item Or item.ItemType = ListItemType.AlternatingItem Then
                'finally set the add to cart button
                addButton = DirectCast(LoadControl("~/cart/add_to_cart_control/add_to_cart.ascx"), add_to_cart)
                addButton.productID = productID.Text
                addButton.product = productName.Text
                addButton.sizeID = sizeID.Text
                addButton.size = size.Text
                addButton.flavourID = flavours.SelectedIndex
                addButton.flavour = flavours.SelectedValue.ToString
                addButton.price = price.Text
                addButton.Quantity = 1 'quantity.Text
                addButton.Attributes.Add("oncommand", "AddProductToCart")

                bPlaceHolder.Controls.Add(addButton)
            End If

        Next

    End Sub

i have also tried adding the button in the onitemcreated event

        'now create the add button and add

        'If e.Item.ItemType = ListItemType.Item Or e.Item.ItemType = ListItemType.AlternatingItem Then
        ''finally set the add to cart button
        'addButton = DirectCast(LoadControl("~/cart/add_to_cart_control/add_to_cart.ascx"), add_to_cart)
        'addButton.productID = productID.Text
        'addButton.product = productName.Text
        'addButton.sizeID = sizeID.Text
        'addButton.size = size.Text
        'addButton.flavourID = flavours.SelectedIndex
        'addButton.flavour = flavours.SelectedValue.ToString
        'addButton.price = price.Text
        'addButton.Quantity = quantity.Text

        'placeHolder.Controls.Add(addButton)
        'End If

now both seem to add the button but its losing the click event the ascx is simply

----------------------------ascx-------------------------------

<&#37;@ Control Language="VB" AutoEventWireup="true" CodeFile="add_to_cart.ascx.vb" Inherits="add_to_cart" %>
<%@ Reference Control="~/main/left_side_frame/basket/side_cart.ascx" %>
<asp:button id="add_to_cart_button" text="Add to Cart" OnCommand="AddProductToCart" runat="server"/>

--------------------------ascx.vb-----------------------------

   Sub AddProductToCart(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.CommandEventArgs) Handles add_to_cart_button.Click

...

End Sub

any ideas why?

many thanks in advance,

Matt.