Export Repeater nested with multiple gridview to excel

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ASP.NET

C#3.5

Hi,

I want to export repeater having child grid views to excel. I bind child control inside the item data bound of repeater, and I wrote the code for exporting to excel, it shows excel but with no data

protected void lnkPrint_Click(object sender, EventArgs e)
  {
      Response.Clear();
      Response.Buffer = true;
      Response.AddHeader("content-disposition", "attachment;filename=finance.xls");
      Response.Charset = "UTF-8";

      Response.ContentType = "application/vnd.ms-excel";
      System.IO.StringWriter stringWrite = new System.IO.StringWriter();
      System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
      rptProduct.RenderControl(htmlWrite);
      Response.Write("<table>");
      Response.Write(stringWrite.ToString());

      Response.Write("</table>");
      Response.End();
  }

Any help is appreciated.

Regards
chinnu