Экспортировать содержимое панели в PDF не работает

Question

Я хочу экспортировать содержимое панели в pdf, но я получаю ошибку, на панели у меня есть таблица и Gridview.

ASPX страница:

  <asp:Panel ID = "pnl_export" runat = "server" > 
       <table> 
       <tr> 
        <td> 
         <asp:Label ID="rptname" runat="server" Text=""></asp:Label> 
        </td> 
        <td> 
         <asp:Label ID="lbid" runat="server"></asp:Label> 
        </td> 
       </tr> 
       <tr> 
        <td> 
         <asp:Label ID="lbexp" runat="server" Text="Report Exported On : "></asp:Label> 
        </td> 
        <td> 
         <asp:Label ID="lbdate" runat="server"></asp:Label> 
        </td> 
       </tr> 
       <tr> 
        <td> 
         <asp:Label ID="lfrm" runat="server" Text="From : "></asp:Label> 
        </td> 
        <td> 
         <asp:Label ID="fdate" runat="server"></asp:Label> 
        </td> 
        <td> 
         <asp:Label ID="lto" runat="server" Text="To : "></asp:Label> 
        </td> 
        <td> 
         <asp:Label ID="tdate" runat="server"></asp:Label> 
        </td> 
       </tr> 
       </table> 
       <asp:GridView ID="GridView1" runat="server" Width="63%" align="Center" PageSize="20" 
        AllowPaging="true" OnRowDataBound="GridView1_RowDataBound" OnPageIndexChanging="GridView1_PageIndexChanging"> 
        <AlternatingRowStyle BackColor="White" ForeColor="#284775" /> 
    <PagerSettings Mode="NextPreviousFirstLast" FirstPageText="First" LastPageText="Last" 
         NextPageText="Next" PreviousPageText="Prev" Position="TopAndBottom" /> 

       </asp:GridView> 
       </asp:Panel> 

Код За для PDF Экспорт:

  protected void pdfExport_Click(object sender, EventArgs e) 
     { 
     using (StringWriter sw = new StringWriter()) 
     { 
      using (HtmlTextWriter hw = new HtmlTextWriter(sw)) 
      { 
       // GridView1.AllowPaging = false; 
       Response.ContentType = "application/pdf"; 
       Response.AddHeader("content-disposition", "attachment;filename=AgentReport.pdf"); 
       Response.Cache.SetCacheability(HttpCacheability.NoCache); 
       pnl_export.RenderControl(hw); 
       String htmlString = sw.ToString().Substring(0, sw.ToString().Length - 1); 
       StringReader sr = new StringReader(htmlString); 
       Document pdfDoc = new Document(PageSize.A2, 10f, 10f, 10f, 0f); 
       pdfDoc.Open(); 
       HTMLWorker htmlparser = new HTMLWorker(pdfDoc); 

       PdfWriter.GetInstance(pdfDoc, Response.OutputStream); 

       htmlparser.Parse(sr); 
       pdfDoc.Close(); 

       Response.Write(pdfDoc); 
       Response.End(); 

      } 

     } 


    } 

Это не работает давая мне ошибку,

Error : Unable to cast object of type 'iTextSharp.text.html.simpleparser.TableWrapper' to type 'iTextSharp.text.ITextElementArray'. 

HTML Содержание:

 <div id="pnl_export"> 

    <table> 
     <tr> 
      <td> 
       <span id="rptname">Agent Report For AgentID : </span> 
      </td> 
      <td> 
       <span id="lbid">RSBOM0400986</span> 
      </td> 
     </tr> 
     <tr> 
      <td> 
       <span id="lbexp">Report Exported On : </span> 
      </td> 
      <td> 
       <span id="lbdate">10:01:34 AM</span> 
      </td> 
     </tr> 
     <tr> 
      <td> 
       <span id="lfrm">From : </span> 
      </td> 
      <td> 
       <span id="fdate">25/11/2014</span> 
      </td> 
      <td> 
       <span id="lto">To : </span> 
      </td> 
      <td> 
       <span id="tdate">28/11/2014</span> 
      </td> 
     </tr> 
     <div> 
    <table cellspacing="0" rules="all" align="Center" border="1" id="GridView1" style="width:63%;border-collapse:collapse;"> 
     <tr style="color:White;background-color:#5D7B9D;font-weight:bold;"> 
      <th scope="col">Sr.No</th><th scope="col">Sales Person</th><th scope="col">Remark</th><th scope="col">Date Visited</th> 
     </tr><tr class="Textsmall" align="center" valign="middle" style="color:#333333;background-color:#F7F6F3;border-style:None;"> 
      <td>1</td><td>Manish Goswami-700145</td><td>fhvhvhffffffftt</td><td>26-Nov-14 5:53:49 PM</td> 
     </tr><tr class="Textsmall" align="center" valign="middle" style="color:#284775;background-color:White;border-style:None;"> 
      <td>2</td><td>Manish Goswami-700145</td><td>remark km from my name of the way to</td><td>26-Nov-14 5:59:23 PM</td> 
     </tr> 
    </table> 
</div> 
    </table> 

Пожалуйста, помогите мне решить эту ошибку. Спасибо заранее.

Answer 1

попробовать этот путь

protected void pdfExport_Click(object sender, EventArgs e) 
{ 
    Response.ContentType = "application/pdf"; 
    Response.AddHeader("content-disposition", "attachment;filename=AgentReport.pdf"); 
    Response.Cache.SetCacheability(HttpCacheability.NoCache); 
    StringWriter sw = new StringWriter(); 
    HtmlTextWriter hw = new HtmlTextWriter(sw); 
    pnl_export.RenderControl(hw); 
    StringReader sr = new StringReader(sw.ToString()); 
    Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 100f, 0f); 
    HTMLWorker htmlparser = new HTMLWorker(pdfDoc); 
    PdfWriter.GetInstance(pdfDoc, Response.OutputStream); 
    pdfDoc.Open(); 
    htmlparser.Parse(sr); 
    pdfDoc.Close(); 
    Response.Write(pdfDoc); 
    Response.End(); 
}