Exporting HTML report to Excel

I have created a HTML report dynamically. I use the following code to export it to Excel.

Response.ContentType = "application/vnd.ms-excel";

Response.AppendHeader("content-disposition", "attachment; filename= Center_Wise_Registration_Statistics_" + DateTime.Now.ToLongDateString());

Response.Charset = "";

System.IO.StringWriter sw = new System.IO.StringWriter();

System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(sw);

hw.RenderBeginTag(System.Web.UI.HtmlTextWriterTag.Html);