calling popup window from within a button in gridview

Question

Hi, 

 

I have creaed a popup once I click on a button, pupup will show with list of items for user to view.

This works fine. Now, I want  to create similar button inside gridview  , once user click on a button in gridview. it will  show hte popup . So my question how can I reference  TargetControlId to point to a button control inside Gridview .

please advise, 

 

<div>

<asp:Button ID="Button1" runat="server" Text="fill form" />

<ajaxToolkit:ModalPopupExtender ID="ModalPopupExtender1" runat="server"

CancelControlID="Button2"

TargetControlID="Button1"

PopupControlID="Panel1">

</ajaxToolkit:ModalPopupExtender>

<asp:Panel ID="Panel1" runat="server" CssClass="Popup" align="center" Style="display: none">

<iframe style="width: 400px; height:280px; background-color:white;" id="irm1"

scrolling="no" src="popUpDoc.aspx" runat="server"></iframe>

<br />

<asp:Button ID="Button2" runat="server" Text="Close" />

</asp:Panel>

</div>