如何使用带有C#的itext7将u3d添加到现有的pdf中 [英] How to add u3d into existing pdf using itext7 with C#

问题描述

我正在使用iText7(C#)创建pdf.我需要在现有的pdf文件中添加u3d图片.我可以找到示例( http: //developers.itextpdf.com/examples/itext-action-second-edition/chapter-16#619-pdf3d.java )，但它是Java.谁能帮我在.net C#上给我一个例子?

I am using iText7 (C#) to create the pdf. I need to add a u3d picture to the exising pdf. I can find the example (http://developers.itextpdf.com/examples/itext-action-second-edition/chapter-16#619-pdf3d.java) but it is java one. Can anyone help to give me an example on .net C#?

推荐答案

链接的示例适用于iText5，而不适用于iText7. 在iText7中，该示例如下所示:

The Linked example is for iText5, not iText7. In iText7 this example would look like this

  public static final String DEST = "./target/test/resources/book/part4/chapter16/Listing_16_16_Pdf3D.pdf";
    public static String RESOURCE = "./src/test/resources/img/teapot.u3d";

    public static void main(String args[]) throws Exception {
        new Listing_16_16_Pdf3D().manipulatePdf(DEST);
    }

    public void manipulatePdf(String dest) throws Exception {
        PdfDocument pdfDoc = new PdfDocument(new PdfWriter(dest));

        Document doc = new Document(pdfDoc);
        Rectangle rect = new Rectangle(100, 400, 400, 400);

        PdfStream stream3D = new PdfStream(pdfDoc, new FileInputStream(RESOURCE));
        stream3D.put(PdfName.Type, new PdfName("3D"));
        stream3D.put(PdfName.Subtype, new PdfName("U3D"));
        stream3D.setCompressionLevel(CompressionConstants.DEFAULT_COMPRESSION);
        stream3D.flush();

        PdfDictionary dict3D = new PdfDictionary();
        dict3D.put(PdfName.Type, new PdfName("3DView"));
        dict3D.put(new PdfName("XN"), new PdfString("Default"));
        dict3D.put(new PdfName("IN"), new PdfString("Unnamed"));
        dict3D.put(new PdfName("MS"), PdfName.M);
        dict3D.put(new PdfName("C2W"),
                new PdfArray(new float[]{1, 0, 0, 0, 0, -1, 0, 1, 0, 3, -235, 28}));
        dict3D.put(PdfName.CO, new PdfNumber(235));

        Pdf3DAnnotation annot = new Pdf3DAnnotation(rect, stream3D);
        annot.setContents(new PdfString("3D Model"));
        annot.setDefaultInitialView(dict3D);
        pdfDoc.addNewPage().addAnnotation(annot);
        doc.close();
    }

或者，如果您希望在C#中使用它(还没有在本地运行它，但是Visual Studio并没有抱怨语法)

Or, if you want it in C# (haven't ran it locally, but visual studio is not complaining about syntax)

    public void manipulatePdf(String dest) {
        PdfDocument pdfDoc = new PdfDocument(new PdfWriter(dest));

        Document doc = new Document(pdfDoc);
        Rectangle rect = new Rectangle(100, 400, 400, 400);

        PdfStream stream3D = new PdfStream(pdfDoc, new FileInputStream(RESOURCE));
        stream3D.Put(PdfName.Type, new PdfName("3D"));
        stream3D.Put(PdfName.Subtype, new PdfName("U3D"));
        stream3D.SetCompressionLevel(CompressionConstants.DEFAULT_COMPRESSION);
        stream3D.Flush();

        PdfDictionary dict3D = new PdfDictionary();
        dict3D.Put(PdfName.Type, new PdfName("3DView"));
        dict3D.Put(new PdfName("XN"), new PdfString("Default"));
        dict3D.Put(new PdfName("IN"), new PdfString("Unnamed"));
        dict3D.Put(new PdfName("MS"), PdfName.M);
        dict3D.Put(new PdfName("C2W"),
                new PdfArray(new float[] { 1, 0, 0, 0, 0, -1, 0, 1, 0, 3, -235, 28 }));
        dict3D.Put(PdfName.CO, new PdfNumber(235));

        Pdf3DAnnotation annot = new Pdf3DAnnotation(rect, stream3D);
        annot.SetContents(new PdfString("3D Model"));
        annot.SetDefaultInitialView(dict3D);
        pdfDoc.AddNewPage().AddAnnotation(annot);
        doc.Close();
    }

这篇关于如何使用带有C#的itext7将u3d添加到现有的pdf中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！