How to get FileUpload file from ModalPopupExtender? - asp.net

Question

I got this modal popup extender but i can't get the files on the FileUpload control. here's my code:
<asp:Button ID="targC" runat="server" Style="display: none;" Text="here" />
<ajax:ModalPopupExtender ID="myExtender" runat="server" BackgroundCssClass="myModalPopupbackGrnd"
TargetControlID="targC" PopupControlID="pnlUserRegNoti" OkControlID="btnDone">
</ajax:ModalPopupExtender>
<asp:Panel ID="pnlUserRegNoti" Width="70%" Style="display: none;" CssClass="myModalPopupload"
runat="server">
<center>
<br />
<br />
<table width="80%">
<tr>
<td>
<center>
<h3><b>Requirements of New Application</b></h3>
<asp:HiddenField ID="validateUploads" runat="server" />
<table>
<tr>
<td>DTI Application Form</td>
<td><asp:FileUpload ID="dtiFileUpload" runat="server" onchange = "return CheckForTestFileDTI();" />
<asp:CustomValidator ID="CustomValidator1" ControlToValidate="dtiFileUpload" runat="server" OnServerValidate="CustomValidator1_ServerValidate" Text="File is too large. Max size is 20MB."></asp:CustomValidator>
</td>
</tr>
<tr>
<td>
<center>
<asp:Button ID="btnDone" runat="server" CssClass="button" Text="Done" OnClick="btnDone_Click" />
</center>
</td>
</tr>
</table>
</center>
</asp:Panel>
i will be using the file on the FileUpload control to upload to WindowsAzure. how can i get the values on the file upload inside the modalpopupextender?

Answer 1

You will need to to retrieve that FileUpload from within the Panel to interact with it in your code behind:
FileUpload dtiFileUpload = (FileUpload)pnlUserRegNoti.FindControl("dtiFileUpload");