Generating A Pdf Text Document?

I am trying to generate a pdf document using the following code which i picked up from one of these forums. It had worked fine when I exported a gridview to pdf.

Now I need to export HTML code to pdf. Can someone suggest how to proceed, possibly using the gridview exporting code below? Any other approach is also welcome.

Code:

Response.ContentType = "application/pdf";
filename = "DocumentName.pdf";
Response.AddHeader("content-disposition", "attachment;filename=" + filename);
Response.Cache.SetCacheability(HttpCacheability.NoCache);
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
gridView1.RenderControl(hw);
StringReader sr = new StringReader(sw.ToString());
Document pdfDoc = new Document(PageSize.B2, 10f, 10f, 10f, 0f);
HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
string sFinanceReportpath = ConfigurationManager.AppSettings["UploadFinanceReportPath"].ToString();
PdfWriter writer = PdfWriter.GetInstance(pdfDoc, new FileStream(sFinanceReportpath + filename, FileMode.Create));
pdfDoc.Open();
htmlparser.Parse(sr);
pdfDoc.Close();
//Response.Write(pdfDoc);
//Response.End();