Error on converting GridView to .pdf file.

I am currently trying to convert GridView that is generated into a pdf file. Unfortunately, I am constantly getting this error:

"Unable to cast object of type 'ITextSharp.text.html.simpleparser.CellWrapper' to type 'iTextSharp.text.Paragraph'.

I will include the code for reference and I really hope any of u guys can point ou the cause of the error.

.cs:

protected void GenerateReport(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);
            HtmlForm frm = new HtmlForm();
            GridView1.AllowPaging = false;
            GridView1.Parent.Controls.Add(frm);
            frm.Attributes["runat"] = "server";
            frm.Controls.Add(GridView1);
            frm.RenderControl(hw);
            GridView1.DataBind();
            GridView1.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();
            pdfDoc.Close();
            Response.Write(pdfDoc);
            Response.End();

.aspx:

 Report Format:<asp:DropDownList ID="ddlReportFormat" runat="server">
    <asp:ListItem Text="Please Select A Format" Value="default"></asp:ListItem> 
    <asp:ListItem Text="Excel" Value="1"></asp:ListItem>
    <asp:ListItem Text="Word" Value="2"></asp:ListItem>
    <asp:ListItem Text="PDF" Value="3"></asp:ListItem>
    </asp:DropDownList>
    <asp:Button ID="repSel" runat="server" Text="Generate Report" OnClick="GenerateReport"/>

Thanks in advance!

Re: Error on converting GridView to .pdf file.

Hi,

Basically, the problem is not your code. It's the HTML that you are passing to iTextSharp. There is most likely something it doesn't lik in the HTML

check code in below

protected void btnExportPDF_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);
    GridView1.AllowPaging = false;
    GridView1.DataBind();
    GridView1.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();
}

Link

http://www.aspsnippets.com/Articles/Export-GridView-To-Word-Excel-PDF-CSV-Formats-in-ASP.Net.aspx

http://am22tech.com/s/22/Blogs/post/2011/09/28/HTML-To-PDF-using-iTextSharp.aspx