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Error on converting GridView to .pdf file. RSS

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Last post Apr 17, 2012 05:02 AM by Bhavik Solucky

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NIthya Natha...

Member

6 Points

59 Posts

Error on converting GridView to .pdf file.

Apr 17, 2012 04:31 AM|LINK

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!

Please mark as 'answer' if it is helpful. Thanks in advance!

Edited by NIthya Nathan on Apr 19, 2012 09:16 AM

Bhavik Solu...

Member

746 Points

159 Posts

Re: Error on converting GridView to .pdf file.

Apr 17, 2012 05:02 AM|LINK

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

Bhavik Solucky | My Blog