Exporting in pdf file......

StringBuilder str = new StringBuilder();
            BAL.EmailForVerification ObjEmailVer = new BAL.EmailForVerification();//FROM EmailForVerification.cs BAL
            DataTable dt = ObjEmailVer.SelectPrepetsPartForReceipt();
            if (dt.Rows.Count > 0)
            {       
                Response.Clear();
                Response.Buffer = true;
                Response.AddHeader("content-disposition", "attachment;filename=Receipts.pdf");
                Response.ContentType = "application/pdf";
                Response.Cache.SetCacheability(HttpCacheability.NoCache);
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    string status = string.Empty;
                    if (Convert.ToString(dt.Rows[i]["Resident Category"]).ToLower() == "yes")
                    {
                        status = "Couple";
                    }
                    else if (Convert.ToString(dt.Rows[i]["Resident Category"]).ToLower() == "no")
                    {
                        status = "Single";
                    }
                    //str.Append("<h2 style='page-break-before: always;'> </h2>");
                    str.Append("<table width=100% cellpadding=3 cellspacing=0 border=0 style=border:solid 1px #000000;>");
                    str.Append("<tr><td align=center colspan=2 valign=top><table width=100% cellpadding=0 cellspacing=0 border=0><tr><td align=left width=10%><img src=http://prepets.rotarydombivlieast.org/App_Themes/images/RotaryLogo_wh-k.jpg width=60 height=60  /></td><td align=center width=90% style=font-size:16pt; font-weight:bold; font-family:Times New Roman; >Rotary Club of Dombivili East<br/><span style=font-size:10px>Dist. 3140</span> <br/>PREPETS ROYALE 2011</td></tr></table> </td></tr>");
                    str.Append("<tr><td style=width:70%> </td><td style=width:30%; align=left valign=top ><br/>Receipt No: " + Convert.ToString(dt.Rows[i]["ReceiptNo"]) + "<br/>");
                    str.Append("Receipt Date: " + Convert.ToString(dt.Rows[i]["ReceiptDate"]) + "</td></tr>");
                    str.Append("<tr><td align=left valign=top colspan=2><br/>Received from Rtn. " + Convert.ToString(dt.Rows[i]["Name"]) + " Rs. " + Convert.ToString(dt.Rows[i]["AmountPaid"]) + " towards registration charges (" + status + ") for PREPETS 2011. </td></tr>");
                    str.Append("<tr><td align=left valign=top colspan=2><br/>Cheque/DD No.: " + Convert.ToString(dt.Rows[i]["TransactionChequeNo"]) + "     Date: " + Convert.ToString(dt.Rows[i]["TransactionChequeDate"]) + "      Drawn On: " + Convert.ToString(dt.Rows[i]["DrawnonBankName"]) + "</td></tr>");
                    str.Append("<tr><td align=center valign=top colspan=2 > </td></tr>");
                    str.Append("<tr><td align=left valign=top colspan=2 style=padding-left:320px; ><br/>PP Dr. Madhav Baitule <br/>");
                    str.Append("Treasurer <br/>");
                    str.Append("PREPETS Organizing Committee <br/>");
                    str.Append("Rotary Club of Dombivli East </td></tr>");
                    str.Append("</table>");
                    str.Append("<h2 style='page-break-after: always;'> </h2>");
                    //str.Append("<br/>");
                }
                Response.Output.Write(str.ToString());
                Response.Flush();
                Response.End();
            }