Problem in rendering the html data into excel

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ASP.NET

Hi All,

I have the below code which is working fine for exporting the data into excel, but
along with specific html data, its displaying the entire page too in excel sheet:

protected void lnkbtnExport_Click(object sender, EventArgs e)
   {
       ExcelHead.Visible = true;
       string fileName = "attachment;filename= UserProdReport_" + DateTime.Now.ToString("dd-MM-yyyy-hh-mm-ss") + ".xls";
       Response.Clear();
       Response.AddHeader("content-disposition", fileName);
       Response.Charset = "";
       Response.Cache.SetCacheability(HttpCacheability.NoCache);
       Response.ContentType = "application/excel";
       System.IO.StringWriter stringWrite = new System.IO.StringWriter();
       System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
       ExcelHead.RenderControl(htmlWrite);
       gvUserProd.RenderControl(htmlWrite);
       Response.Write(stringWrite);
       Response.End();
       ExcelHead.Visible = false;
   }

Here, it has to display only the 'ExcelHead' and 'gvUserProd'.. but I am getting the entire page content along with these two..

Any idea regarding this issue? Please help me on this.

Regards,