i want a code for convert data in to pdf from grid view

CR_visitor_Pass cr = new CR_visitor_Pass();
search_Record SR_obj = new search_Record();
DataTable DT = new DataTable();
DT = SR_obj.Search_Record_For_PrintPass(pass_obj);
cr.SetDataSource(DT);
MemoryStream oStream;
oStream = (MemoryStream)
                            cr.ExportToStream(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat);
Cache["testr"] = oStream.ToArray();

ScriptManager.RegisterStartupScript(Page, typeof(Page), "OpenWindow", "window.open('Pdfconvert.aspx');", true);

protected void Page_Load(object sender, EventArgs e)
        {

            ArrayList ary = new ArrayList();
            ary.Add(Cache["testr"]);
            Cache.Remove("testr");

            BinaryFormatter f = new BinaryFormatter();
            MemoryStream ms = new MemoryStream();
            f.Serialize(ms, ary);

            CR_visitor_Pass cr = new CR_visitor_Pass();
            cr.Load(Server.MapPath("~/CR_visitor_Pass.rpt"));            
            Response.Clear();
            Response.Buffer = true;
            Response.ContentType = "application/pdf";
            Response.BinaryWrite(ms.ToArray());
            Response.End();
        }