how to write htmltable data in to excel in diff sheets in asp.net sharepoint

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ASP.NET

SharePoint2010

Hello friends, we are trying to write our Htmltable to excel it is working fine, now actually we want to write data in 2 different sheet of the same excel. like there is Sheet1 and sheet2 in that we want to write 2 html table can any one help to do this. we are using htmlwriter to write data to excel. we are working in Sharepoint 2010 and we have created one asp.net page

Response.Clear();
           Response.ContentType = "application/ms-excel";
           Response.AddHeader("content-disposition", string.Format("attachment;filename={0}.xls", filename));
           System.IO.StringWriter sw = new System.IO.StringWriter();
           HtmlTextWriter hw = new HtmlTextWriter(sw);
           tb.RenderControl(hw);
           Response.Write(sw.ToString());
           Response.End();