CODEWITHSUNDEEP
c#htmlitext
newbie_86
newbie_86

Reputation: 4610

ITextSharp repeat HTML table header in PDF

I have an HTML table in a view. I'm using ITextSharp 4 to convert the HTML to a PDF using the htmlParser. The table spans multiple pages. How do I get it to show the header on each page? Is there some setting I can turn on in HTML so that ITextSharp can recognise it?

Upvotes: 1

Views: 11441

Answers (3)

Juan Jimenez
Juan Jimenez

Reputation: 763

Apply the "repeat-header" style, and set to "yes", like so:

<table style="repeat-header:yes;">

Upvotes: 2

Adam Seabridge
Adam Seabridge

Reputation: 2044

you should just be able to set: table.HeaderRows = 1;

this will repeat the header on each page.

Upvotes: 3

Chris Haas
Chris Haas

Reputation: 55417

I don't have access to iTextSharp 4.0 but since the HTML parser writes directly to the document I'm not sure if it would be possible without modify the original source. Is it an option to upgrade to 5.0 which completely replaced the HtmlParser with a much more robust HTMLWorker object?

To have a PdfPTable's headers span multiple page you need to set its HeaderRows property to the number of rows in your header. Unfortunately if you're using the HTMLParser or the HTMLWorker they do not currently treat THEAD and TH tags differently than TBODY and TD tags. The solution is to modify the PdfPTable sometime after parsing but before being written to the document. I don't have 4.0 available here but in 5.1.1.0 using the HTMLWorker you can easily do that and manually set the HeaderRows property:

        //Output file
        string outputFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "Table.pdf");

        using (FileStream fs = new FileStream(outputFile, FileMode.Create, FileAccess.Write, FileShare.Read))
        {
            using (Document doc = new Document(PageSize.LETTER))
            {
                using (PdfWriter w = PdfWriter.GetInstance(doc, fs))
                {
                    doc.Open();

                    doc.NewPage();

                    //Create some long text to force a new page
                    string longText = String.Concat(Enumerable.Repeat("Lorem ipsum.", 40));

                    //Create our table using both THEAD and TH which iTextSharp currently ignores
                    string html = "<table>";
                    html += "<thead><tr><th>Header Row 1/Cell 1</th><th>Header Row 1/Cell 2</th></tr><tr><th>Header Row 2/Cell 1</th><th>Header Row 2/Cell 2</th></tr></thead>";
                    html += "<tbody>";

                    for (int i = 3; i < 20; i++)
                    {
                        html += "<tr>";
                        html += String.Format("<td>Data Row {0}</td>", i);
                        html += String.Format("<td>{0}</td>", longText);
                        html += "</tr>";
                    }
                    html += "</tbody>";
                    html += "</table>";

                    using (StringReader sr = new StringReader(html))
                    {
                        //Get our list of elements (only 1 in this case)
                        List<IElement> elements = iTextSharp.text.html.simpleparser.HTMLWorker.ParseToList(sr, null);
                        foreach (IElement el in elements)
                        {
                            //If the element is a table manually set its header row count
                            if (el is PdfPTable)
                            {
                                ((PdfPTable)el).HeaderRows = 2;
                            }
                            doc.Add(el);
                        }
                    }
                    doc.Close();
                }
            }
        }

Upvotes: 4

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