wpf 如何将多个 fpages 添加到 xps 中的固定文档？
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How to add multiple fpages to fixed document in xps?
提问by Shafiq Abbas
My requirement is to create xps document which has 10 pages (say). I am using the following code to create a xps document. Please take a look.
我的要求是创建具有 10 页（比如说）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_1.jpg");
StringBuilder pageContents = new StringBuilder();
pageContents.Append(ReadFile(@"D:\Single content.fpage.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();
}
If you see it, i would have passed single image and single fpage to create a xps document. I want to pass multiple fpages list and image list to create a xps document which has multiple pages..?
如果你看到它，我会通过单个图像和单个 fpage 来创建一个 xps 文档。我想通过多个 fpages 列表和图像列表来创建一个具有多个页面的 xps 文档..？
回答by
You are doing this in the most excruciatingly difficult manner possible. I'd suggest taking the lazy man's route.
你正在以最难以忍受的方式来做这件事。建议走懒人路线。
Realize that an XpsDocument is just a wrapper on a FixedDocumentSequence, which contains zero or more FixedDocuments, which contains zero or more FixedPages. All these types can be created, manipulated and combined without writing XML.
意识到 XpsDocument 只是 a 的包装器FixedDocumentSequence，其中包含零个或多个FixedDocuments，其中包含零个或多个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。
All you really need to do is create a FixedPage with whatever content on it you need. Here's an example:
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。下面是一个例子：
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;
}
This is all WPF. I'm creating a FixedPage that has as its root a Grid, which contains an Image that is loaded from the given Uri. The image will be stretched to fill the available space of the Grid. Or, you could do whatever you want. Create a template as a UserControl, send it text to place within itself, whatever.
这就是所有的 WPF。我正在创建一个以 Grid 为根的 FixedPage，其中包含从给定 Uri 加载的图像。图像将被拉伸以填充网格的可用空间。或者，你可以为所欲为。创建一个模板作为用户控件，将其发送文本以放置在其自身内，无论如何。
Next, you just need to add a bunch of fixed pages to an XpsDocument. It's incredibly hard, so read carefully:
接下来，您只需要将一堆固定页面添加到XpsDocument. 这非常难，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);
}
And that's all you need to do. Create your pages, add them to your document. Done.
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。完毕。
