選択したgridview deatailsをpdfに変換する方法は？エラーが発生しましたか？

Question

コード1：

private void GetPaymentReport() 
     { 
      try 
      { 
       string todate = txttodate.Text; 
       string[] todatesplt = todate.Split('-'); 
       int todatemnth = Convert.ToInt32(todatesplt[0]); 
       int todatedate = Convert.ToInt32(todatesplt[1]); 
       int todateyr = Convert.ToInt32(todatesplt[2]); 

       string fromdate = txtfromdate.Text; 
       string[] frmdatesplt = fromdate.Split('-'); 
       int frmdatemnth = Convert.ToInt32(frmdatesplt[0]); 
       int frmdatedate = Convert.ToInt32(frmdatesplt[1]); 
       int frmdateyr = Convert.ToInt32(frmdatesplt[2]); 
       DateTime start = new DateTime(frmdateyr, frmdatemnth, frmdatedate); 
       DateTime end = new DateTime(todateyr, todatemnth, todatedate); 
       int loanpaymentid = Convert.ToInt32(Session["Loanid"].ToString()); 
       var query = from p in mortgageentity.Payments 
          join D in mortgageentity.Debit_Method on p.Debit_Method_ID equals D.Debit_Method_ID 
          join pt in mortgageentity.Payment_Type on p.Payment_Type_ID equals pt.Payment_Type_ID 
          where (p.Client_Pmt_Date >= start) && (p.Client_Pmt_Date <= end) && (p.Loan_ID == loanpaymentid)orderby p.Client_Pmt_Date descending 
          select new 
          { 
           p.Pmt_ID, 
           p.Loan_ID, 
           p.Client_Pmt_Date, 
           p.MtgSvr_Pmt_Start_Date2, 
           D.Debit_Method_Desc, 
           p.Total_Debit_Amt, 
           p.CreditAmt, 
           p.LenderAmt, 
           pt.Payment_Type_Desc, 
           p.Return_Code, 
           p.Returned_Date 
          }; 
       grdviewPayments.DataSource = query.ToList(); 
       grdviewPayments.DataBind(); 
      } 
      catch { } 

     } 

コード2：

protected void btnemail_Click(object sender, EventArgs e) 
     { 
    Response.ContentType = "application/pdf"; 
      Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.pdf"); 
      Response.Cache.SetCacheability(HttpCacheability.NoCache); 
      StringWriter sw = new StringWriter(); 
      HtmlTextWriter hw = new HtmlTextWriter(sw); 
      grdviewPayments.AllowPaging = false; 
      grdviewPayments.DataBind(); 
      grdviewPayments.RenderControl(hw); 
      StringReader sr = new StringReader(sw.ToString()); 
      Document pdfDoc = new Document(PageSize.A4,10f,10f,10f,0f); 
      HTMLWorker htmlparser = new HTMLWorker(pdfDoc); 
      PdfWriter.GetInstance(pdfDoc,Response.OutputStream); 
      pdfDoc.Open(); 
      htmlparser.Parse(sr); 
      pdfDoc.Close(); 
      Response.Write(pdfDoc); 
      Response.End(); 

     } 

私はGridViewのfromatでデータベースからデータを取得するCODE1持っており、私のprolem format.but PDFにGridViewのデータをCONVERするCODE2上記のように"Control 'のようなエラーが発生しています。' GridView 'タイプのctl00_ContentPlaceHolder1_TabContainer1_TabPanel1_Paymentreport_grdviewPaymentsは、runat = serverのフォームタグ内に配置する必要があります。コード2の位置で：grdviewPayments.RenderControl（hw）;

私を助けてください。 はお待ちしております。

Answer 1

多分StringBuilderも組み込む必要がありますか？

StringBuilder sb = new StringBuilder(); 
StringWriter tw = new StringWriter(sb); 
HtmlTextWriter hw = new HtmlTextWriter(tw); 
grdviewPayments.RenderControl(hw); 
StringReader sr = new StringReader(hw.ToString()); 

私はので、私はこのページに読んだの推測：
http://blogs.x2line.com/al/articles/859.aspx