Modal Popup from code behind

I'm having issues trying to load a Modal Popup from a OnClick event from an Image Button. This code goes through and actually runs the sub from the code behind file, but when the page actually finishes loading the modal popup does not show up, it basically just refreshes my page. Can anyone tell me what I'm doing wrong? I'm needing this to work because eventually I'm going to be putting this into a repeater for a bunch of image thumbnails, on click of a particular thumbnail it will load a modal popup with a larger image and some text information.

In my actual file (code below is in a test page without the repeater information), I have the same code but add in my repeater code around it, but on button click it won't even fire the sub from code behind, it simply does a page refresh and thats it.

If I can get this test page to work, then maybe the other will fall into place too.

Frontend Code:
1 <asp:scriptmanager runat="server"></asp:scriptmanager>
2
3 <asp:ImageButton runat="server" ID="test" OnClick="myRun" ImageUrl="/my.jpg" />

4 <asp:Button ID="btnShowPreview" Visible="False" runat="server" Text="Button" />
5
6 <%--Designs--%>
7 <asp:Panel ID="pnlPreview" CssClass="popupModal" Style="display: none;" runat="server" Width="600px">
8 This is the panel.
9 </asp:Panel>

Backend Code: 
1Sub myRun(ByVal SourceAs Object,ByVal ArgsAs ImageClickEventArgs)2Dim modPreviewAs New AjaxControlToolkit.ModalPopupExtender34 modPreview.ID ="mpePreview"5 modPreview.TargetControlID ="btnShowPreview"6 modPreview.PopupControlID ="pnlPreview"7 modPreview.BackgroundCssClass ="modalBackground"9End Sub
 Hope you can help.
Micah

In your codebehind you are just creating the popup extender, you aren't showing it.
You need to call .Show() when you've created it.

Btw, you don't need to create it in codebehind. Create in your .aspx instead and just call Show() on it.

Good call on that one, I was thinking about it later that night to and couldn't figure out why I was doing it from code behind.

I moved the model popup extender to .aspx page and call the mpePreview.Show() from code behind, it does run through the code still, but never displays the modal still.

Any other suggestions? Do I need to have certain properties set on my modal and scriptmanager that I'm missing?

Thanks for the help

MIcah

Ah ha, kind of figured it out, my hidden button is causing the issue, if I make my button visible it works, if I make it invisible it fails.

So now I just need to figure out how to hide my control and have it still fire correctly.

style="display: none;"

will hide effectively.

<asp:Button runat="server" ... style="display: none;" />

Intellisense won't pick it up but you can put it there.

Ahh, sweet that worked perfectly! I hadn't even thought about that option.

Great, Thank you very much.

Micah