web-dev-qa-db-fra.com

Comment convertir HTML en PDF en utilisant iTextSharp

Je souhaite convertir le code HTML ci-dessous en PDF à l'aide de iTextSharp, mais je ne sais pas par où commencer:

<style>
.headline{font-size:200%}
</style>
<p>
  This <em>is </em>
  <span class="headline" style="text-decoration: underline;">some</span>
  <strong>sample<em> text</em></strong>
  <span style="color: red;">!!!</span>
</p>
c#pdf-generationitextsharpxmlworker
61
Chris Haas

@Chris Haas a très bien expliqué comment utiliser itextSharp pour convertir HTML en PDF, très utile
mon ajout est:
En utilisant HtmlTextWriter, je mets des balises html dans HTML table + CSS en ligne, j'ai obtenu mon PDF comme je le voulais sans utiliser XMLWorker .
Modifier : ajouter un exemple de code:
Page ASPX:

<asp:Panel runat="server" ID="PendingOrdersPanel">
 <!-- to be shown on PDF-->
 <table style="border-spacing: 0;border-collapse: collapse;width:100%;display:none;" >
 <tr><td><img src="abc.com/webimages/logo1.png" style="display: none;" width="230" /></td></tr>
<tr style="line-height:10px;height:10px;"><td style="display:none;font-size:9px;color:#10466E;padding:0px;text-align:right;">blablabla.</td></tr>
 <tr style="line-height:10px;height:10px;"><td style="display:none;font-size:9px;color:#10466E;padding:0px;text-align:right;">blablabla.</td></tr>
 <tr style="line-height:10px;height:10px;"><td style="display:none;font-size:9px;color:#10466E;padding:0px;text-align:right;">blablabla</td></tr>
<tr style="line-height:10px;height:10px;"><td style="display:none;font-size:9px;color:#10466E;padding:0px;text-align:right;">blablabla</td></tr>
<tr style="line-height:10px;height:10px;"><td style="display:none;font-size:11px;color:#10466E;padding:0px;text-align:center;"><i>blablabla</i> Pending orders report<br /></td></tr>
 </table>
<asp:GridView runat="server" ID="PendingOrdersGV" RowStyle-Wrap="false" AllowPaging="true" PageSize="10" Width="100%" CssClass="Grid" AlternatingRowStyle-CssClass="alt" AutoGenerateColumns="false"
   PagerStyle-CssClass="pgr" HeaderStyle-ForeColor="White" PagerStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" RowStyle-HorizontalAlign="Center" DataKeyNames="Document#" 
      OnPageIndexChanging="PendingOrdersGV_PageIndexChanging" OnRowDataBound="PendingOrdersGV_RowDataBound" OnRowCommand="PendingOrdersGV_RowCommand">
   <EmptyDataTemplate><div style="text-align:center;">no records found</div></EmptyDataTemplate>
    <Columns>                                           
     <asp:ButtonField CommandName="PendingOrders_Details" DataTextField="Document#" HeaderText="Document #" SortExpression="Document#" ItemStyle-ForeColor="Black" ItemStyle-Font-Underline="true"/>
      <asp:BoundField DataField="Order#" HeaderText="order #" SortExpression="Order#"/>
     <asp:BoundField DataField="Order Date" HeaderText="Order Date" SortExpression="Order Date" DataFormatString="{0:d}"></asp:BoundField> 
    <asp:BoundField DataField="Status" HeaderText="Status" SortExpression="Status"></asp:BoundField>
    <asp:BoundField DataField="Amount" HeaderText="Amount" SortExpression="Amount" DataFormatString="{0:C2}"></asp:BoundField> 
   </Columns>
    </asp:GridView>
</asp:Panel>

Code C #:

protected void PendingOrdersPDF_Click(object sender, EventArgs e)
{
    if (PendingOrdersGV.Rows.Count > 0)
    {
        //to allow paging=false & change style.
        PendingOrdersGV.HeaderStyle.ForeColor = System.Drawing.Color.Black;
        PendingOrdersGV.BorderColor = Color.Gray;
        PendingOrdersGV.Font.Name = "Tahoma";
        PendingOrdersGV.DataSource = clsBP.get_PendingOrders(lbl_BP_Id.Text);
        PendingOrdersGV.AllowPaging = false;
        PendingOrdersGV.Columns[0].Visible = false; //export won't work if there's a link in the gridview
        PendingOrdersGV.DataBind();

        //to PDF code --Sam
        string attachment = "attachment; filename=report.pdf";
        Response.ClearContent();
        Response.AddHeader("content-disposition", attachment);
        Response.ContentType = "application/pdf";
        StringWriter stw = new StringWriter();
        HtmlTextWriter htextw = new HtmlTextWriter(stw);
        htextw.AddStyleAttribute("font-size", "8pt");
        htextw.AddStyleAttribute("color", "Grey");

        PendingOrdersPanel.RenderControl(htextw); //Name of the Panel
        Document document = new Document();
        document = new Document(PageSize.A4, 5, 5, 15, 5);
        FontFactory.GetFont("Tahoma", 50, iTextSharp.text.BaseColor.BLUE);
        PdfWriter.GetInstance(document, Response.OutputStream);
        document.Open();

        StringReader str = new StringReader(stw.ToString());
        HTMLWorker htmlworker = new HTMLWorker(document);
        htmlworker.Parse(str);

        document.Close();
        Response.Write(document);
    }
}

bien sûr, inclure iTextSharp Refrences to cs

using iTextSharp.text;
using iTextSharp.text.pdf;
using iTextSharp.text.html.simpleparser;
using iTextSharp.tool.xml;

J'espère que cela t'aides!
Je vous remercie

8
Sam

Depuis 2018, il existe également iText7 (une nouvelle itération de l'ancienne bibliothèque iTextSharp) et son package HTML vers PDF disponible: itext7.pdfhtml

L'utilisation est simple:

HtmlConverter.ConvertToPdf(
    new FileInfo(@"Path\to\Html\File.html"),
    new FileInfo(@"Path\to\Pdf\File.pdf")
);

La méthode a beaucoup plus de surcharges.

Mise à jour: La famille de produits iText * a un modèle de double licence : gratuite pour les sources ouvertes, payée pour un usage commercial.

5
George Chakhidze

J'utilise le code suivant pour créer un PDF

protected void CreatePDF(Stream stream)
        {
            using (var document = new Document(PageSize.A4, 40, 40, 40, 30))
            {
                var writer = PdfWriter.GetInstance(document, stream);
                writer.PageEvent = new ITextEvents();
                document.Open();

                // instantiate custom tag processor and add to `HtmlPipelineContext`.
                var tagProcessorFactory = Tags.GetHtmlTagProcessorFactory();
                tagProcessorFactory.AddProcessor(
                    new TableProcessor(),
                    new string[] { HTML.Tag.TABLE }
                );

                //Register Fonts.
                XMLWorkerFontProvider fontProvider = new XMLWorkerFontProvider(XMLWorkerFontProvider.DONTLOOKFORFONTS);
                fontProvider.Register(HttpContext.Current.Server.MapPath("~/Content/Fonts/GothamRounded-Medium.ttf"), "Gotham Rounded Medium");
                CssAppliers cssAppliers = new CssAppliersImpl(fontProvider);

                var htmlPipelineContext = new HtmlPipelineContext(cssAppliers);
                htmlPipelineContext.SetTagFactory(tagProcessorFactory);

                var pdfWriterPipeline = new PdfWriterPipeline(document, writer);
                var htmlPipeline = new HtmlPipeline(htmlPipelineContext, pdfWriterPipeline);

                // get an ICssResolver and add the custom CSS
                var cssResolver = XMLWorkerHelper.GetInstance().GetDefaultCssResolver(true);
                cssResolver.AddCss(CSSSource, "utf-8", true);
                var cssResolverPipeline = new CssResolverPipeline(
                    cssResolver, htmlPipeline
                );

                var worker = new XMLWorker(cssResolverPipeline, true);
                var parser = new XMLParser(worker);
                using (var stringReader = new StringReader(HTMLSource))
                {
                    parser.Parse(stringReader);
                    document.Close();
                    HttpContext.Current.Response.ContentType = "application /pdf";
                    if (base.View)
                        HttpContext.Current.Response.AddHeader("content-disposition", "inline;filename=\"" + OutputFileName + ".pdf\"");
                    else
                        HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=\"" + OutputFileName + ".pdf\"");
                    HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
                    HttpContext.Current.Response.WriteFile(OutputPath);
                    HttpContext.Current.Response.End();
                }
            }
        }
0
Jonas T