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copied!<p>Setting the <code>TargetControlID</code> of the <code>ModalPopupExtender</code> basically trigger the client side Show function of that ModalPopup when the control is clicked. So you need to wire up the controls yourself.</p> <p>First, since the <code>ModalPopupExtender</code> need a <code>TargetControlID</code>, you should add a dummy control to link the modal popup to :</p> <pre><code><asp:Button runat="server" ID="HiddenTargetControlForModalPopup" style="display:none"/> </code></pre> <p>And link the <code>ModalPopupExtender</code> <code>TargetControlID</code> to it</p> <pre><code><asp:ModalPopupExtender ID="ModalPopupExtender1" runat="server" PopupControlID="Panel1" CancelControlID="btnCancel" OnCancelScript="HideModalPopup()" TargetControlID="HiddenTargetControlForModalPopup"> </asp:ModalPopupExtender> </code></pre> <p>So the <code>ModalPopupExtender</code> now has a target that do nothing. Now we now need to do the target's job. You need a javascript function to show the ModalPopup from client side.</p> <pre><code><script type="text/javascript"> var ModalPopup='<%= ModalPopupExtender1.ClientID %>'; function ShowModalPopup() { // show the Popup $find(ModalPopup).show(); } </script> </code></pre> <p>Then you should map the <code>OnClientClick</code> event of the control in your <code>gridview</code> to this javascript function. From your code, I see that you use a <code>asp:HyperLink</code>, I don't think it support the <code>OnClientClick</code> event, so you probably need to switch it to a <code>asp:LinkButton</code>.</p> <pre><code><asp:LinkButton ID="LinkButton1" runat="server" OnClientClick="ShowModalPopup()" /> </code></pre>

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