how to get posted file from html input file using behind code ASP.NET - file-upload

Question

I'm using jquery to copy 1 row to create 1 row below. Control is dynamic.
I have 1 control to copy and paste from tableclone
<input type="button" value="Add Row" id="addrowbutton" class="Button" />
This is the main table :
<table id="registrationtable" class="Grid">
<tr class="Caption">
<th scope="col">
Registration Number
</th>
<th scope="col"> Is Install
</th>
<th scope="col"> Upload File
</th>
<th scope="col"> Remove
</th>
</tr>
And I clone from here
<table id="tableclone" style="display: none;">
<tbody>
<tr class="Row">
<td style="white-space:nowrap;">
<input id="RegistrasiNo" class="RegistrasiNoClass" type="text" />
</td>
<td>
<asp:DropDownList ID="ddlIsInstall" runat="server" class="IsInstallclass">
<asp:ListItem Value="Y" Text="Yes"></asp:ListItem>
<asp:ListItem Value="N" Text="No"></asp:ListItem>
</asp:DropDownList>
</td>
<td>
<div style="float: left">
<input type="file" id="fileUpload" class="fileuploadclass" />
</div>
<div style="float: left">
<input type="button" value="Upload File" id="UploadFileControll" class="UploadFileControllclass" runat="server" />
</div>
</td>
<td>Remove</td>
</tr>
</tbody>
<asp:Button ID="SaveRegistrationID" runat="server" Text="SAVE" OnClick="SaveRegistrationID_Click" CssClass="Button" />
How to get posted file from fileupload dynamicly (more than 1 row) when i click button SAVE ?