how create pdf from gridview and send to outlook

protected void ExportToPDF(object sender, EventArgs e)
{
    using (StringWriter sw = new StringWriter())
        {
            using (HtmlTextWriter hw = new HtmlTextWriter(sw))
            {
                DetailsView1.RenderControl(hw);
                StringReader sr = new StringReader(sw.ToString());
                Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);
                HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
                using (MemoryStream memoryStream = new MemoryStream())
                {
                    PdfWriter.GetInstance(pdfDoc, memoryStream);
                    pdfDoc.Open();
                    htmlparser.Parse(sr);
                    pdfDoc.Close();
                    byte[] bytes = memoryStream.ToArray();
                    memoryStream.Close();
                    string too = string.Concat(DropDownList1.SelectedValue, "@med.sa");
                    string from1 = String.Concat(Label1.Text, "@med.sa");
                    string pass = Session["Pass"].ToString();
                    MailMessage mm = new MailMessage(from1,too);
                   mm.Subject = "GridView Exported PDF";
                 mm.Body = "GridView Exported PDF Attachment";
                   mm.Attachments.Add(new Attachment(new MemoryStream(bytes), "GridViewPDF.pdf"));
                mm.IsBodyHtml = true;
                SmtpClient smtp = new SmtpClient();
                smtp.Host = "100.43.100.101";
                smtp.EnableSsl = true;
                System.Net.NetworkCredential NetworkCred = new System.Net.NetworkCredential();
                NetworkCred.UserName = from1;
                NetworkCred.Password = pass;
                smtp.UseDefaultCredentials = true;
                smtp.Credentials = NetworkCred;
                smtp.Port = 30;
                smtp.Send(mm);
    }
}