c# - 如何在xps中将多个fpages添加到固定文档？

Question

我的要求是创建有 10 页(比方说)的 xps 文档。我正在使用以下代码创建一个 xps 文档。请看一下。

// Create the new document
        XpsDocument xd = new XpsDocument("D:\\9780545325653.xps", FileAccess.ReadWrite);

        IXpsFixedDocumentSequenceWriter xdSW = xd.AddFixedDocumentSequence();

        IXpsFixedDocumentWriter xdW = xdSW.AddFixedDocument();

        IXpsFixedPageWriter xpW = xdW.AddFixedPage();

            fontURI = AddFontResourceToFixedPage(xpW, @"D:\arial.ttf");

            image = AddJpegImageResourceToFixedPage(xpW, @"D:\Single content\20_1.jpg");

            StringBuilder pageContents = new StringBuilder();

            pageContents.Append(ReadFile(@"D:\Single content\20.fpage\20.fpage", i));

            xmlWriter = xpW.XmlWriter;
            xmlWriter.WriteRaw(pageContents.ToString());               
        }
        xmlWriter.Close();
        xpW.Commit();

        // Commit the fixed document
        xdW.Commit();
        // Commite the fixed document sequence writer
        xdSW.Commit();
        // Commit the XPS document itself
        xd.Close();

    }

    private static string AddFontResourceToFixedPage(IXpsFixedPageWriter pageWriter, String fontFileName)
    {
        string fontUri = "";
        using (XpsFont font = pageWriter.AddFont(false))
        {
            using (Stream dstFontStream = font.GetStream())
            using (Stream srcFontStream = File.OpenRead(fontFileName))
            {
                CopyStream(srcFontStream, dstFontStream);

                // commit font resource to the package file
                font.Commit();
            }
            fontUri = font.Uri.ToString();
        }
        return fontUri;
    }

    private static Int32 CopyStream(Stream srcStream, Stream dstStream)
    {
        const int size = 64 * 1024; // copy using 64K buffers
        byte[] localBuffer = new byte[size];
        int bytesRead;
        Int32 bytesMoved = 0;

        // reset stream pointers
        srcStream.Seek(0, SeekOrigin.Begin);
        dstStream.Seek(0, SeekOrigin.Begin);

        // stream position is advanced automatically by stream object
        while ((bytesRead = srcStream.Read(localBuffer, 0, size)) > 0)
        {
            dstStream.Write(localBuffer, 0, bytesRead);
            bytesMoved += bytesRead;
        }
        return bytesMoved;
    }

    private static string ReadFile(string filePath,int i)
    {

        FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.ReadWrite);

        StringBuilder sb = new StringBuilder();
        using (StreamReader sr = new StreamReader(fs))
        {
            String line;
            // Read and display lines from the file until the end of 
            // the file is reached.
            while ((line = sr.ReadLine()) != null)
            {
                sb.AppendLine(line);
            }
        }
        string allines = sb.ToString();

        //allines = allines.Replace("FontUri=\"/Resources/f7728e4c-2606-4fcb-b963-d2d3f52b013b.odttf\"", "FontUri=\"" + fontURI + "\" ");

        //XmlReader xmlReader = XmlReader.Create(fs, new XmlReaderSettings() { IgnoreComments = true });

        XMLSerializer serializer = new XMLSerializer();

        FixedPage fp = (FixedPage)serializer.DeSerialize(allines, typeof(FixedPage));

        foreach (Glyphs glyph in fp.lstGlyphs)
        {
            glyph.FontUri = fontURI;
        }

        fp.Path.PathFill.ImageBrush.ImageSource = image;

        fs.Close();

        string fpageString = serializer.Serialize(fp);



        return fpageString;
    }

    private static string AddJpegImageResourceToFixedPage(IXpsFixedPageWriter pageWriter, String imgFileName)
    {
        XpsImage image = pageWriter.AddImage("image/jpeg");
        using (Stream dstImageStream = image.GetStream())
        using (Stream srcImageStream = File.OpenRead(imgFileName))
        {
            CopyStream(srcImageStream, dstImageStream); // commit image resource to the package file 
            //image.Commit();
        }

        return image.Uri.ToString();

    }

如果您看到它，我会通过单个图像和单个 fpage 来创建一个 xps 文档。我想传递多个 fpages 列表和图像列表来创建一个包含多个页面的 xps 文档..？

Answer 1

您正在以极其困难的方式执行此操作。我建议走懒人路线。

意识到 XpsDocument 只是 FixedDocumentSequence 的包装器，它包含零个或多个 FixedDocuments，后者包含零个或多个 FixedPages。所有这些类型都可以在不编写 XML 的情况下创建、操作和组合。

您真正需要做的就是创建一个包含您需要的任何内容的 FixedPage。这是一个例子:

static FixedPage CreateFixedPage(Uri imageSource)
{
    FixedPage fp = new FixedPage();
    fp.Width = 320;
    fp.Height = 240;
    Grid g = new Grid();
    g.HorizontalAlignment = System.Windows.HorizontalAlignment.Center;
    g.VerticalAlignment = System.Windows.VerticalAlignment.Center;
    fp.Children.Add(g);
    Image img = new Image
    {
        UriSource = imageSource,
    };
    g.Children.Add(image);
    return fp;
}

这就是 WPF。我正在创建一个固定页面，它的根是一个网格，其中包含一个从给定 Uri 加载的图像。图像将被拉伸(stretch)以填充网格的可用空间。或者，你可以做任何你想做的事。创建一个模板作为 UserControl，将文本发送到自身内部，无论如何。

接下来，您只需要将一堆固定页面添加到XpsDocument。这非常困难，所以请仔细阅读:

public void WriteAllPages(XpsDocument document, IEnumerable<FixedPage> pages)
{

    var writer = XpsDocument.CreateXpsDocumentWriter(document);
    foreach(var page in pages)
        writer.Write(page);
}

这就是您需要做的全部。创建您的页面，将它们添加到您的文档中。完成。