ASP.NET

<asp:DataGrid ID="aGrid">
  <Columns>
    <asp:TemplateColumn>
      <ItemTemplate>
        <asp:Repeater ID="aRepeater">
          <HeaderTemplate>
            <asp:Label ID="aLabel" Text='<%# DataBinder.Eval(Container.DataItem, "SomeColumn") %>'></asp:Label>
          </HeaderTemplate>
          <ItemTemplate>
            <asp:TextBox ID="aTextBox" AutoPostBack="true" OnTextChanged="SomeEvent"></asp:TextBox>
          </ItemTemplate>
        </asp:Repeater>
      </ItemTemplate>
    </asp:TemplateColumn>
  </Columns>
</asp:DataGrid>

void SomeEvent(object sender, EventArgs e)
{
    //Bind aRepeater to a certain data source in the ItemDataBound event of aGrid

    //Get reference to aRepeater
    //Parent gets you the RepeaterItem
    //Parent.Parent gets you the Repeater
    Repeater r = (sender as TextBox).Parent.Parent;
    
    //Assert that r.DataSource != null
}

<br />
//e is DataGridItemEventArgs object in ItemDataBound event<br />
e.Item.FindControl("aRepeater") as Repeater;<br />

string filename = "Chadwick2007.pdf";//"cab2.txt";//
Response.AddHeader("Content-Disposition", "attachment; filename=" + filename);
Response.ContentType = "application/octet-stream";
FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://127.0.0.1/ftpfolder/" + filename);
request.Method = WebRequestMethods.Ftp.DownloadFile;
request.UseBinary = true;
FtpWebResponse response = (FtpWebResponse)request.GetResponse();
Stream responseStream = response.GetResponseStream();
StreamReader sr = new StreamReader(responseStream);
int i;
while ((i = responseStream.ReadByte()) != -1)
{
    Response.OutputStream.WriteByte(Convert.ToByte(i));
}