OpenXML - 将书签应​​用于word文档中的段落

Question

下面的代码可以正常使用OPENXML(asp.net)并使用HEADING2打印word文档中的元素...我们如何将书签应用于特定的段落..

我们尝试的是在两个HEADING之间提取部分......我们想知道如何应用书签以及我们如何在两个书签之间使用该提取文本...

const string fileName = @"D:\DocFiles\Scan.docx";
const string documentRelationshipType = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument";
const string stylesRelationshipType = "http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles";
const string wordmlNamespace = "http://schemas.openxmlformats.org/wordprocessingml/2006/main";
XNamespace w = wordmlNamespace;
XDocument xDoc = null;
XDocument styleDoc = null;

using (Package wdPackage = Package.Open(fileName, FileMode.Open, FileAccess.Read))
{
    PackageRelationship docPackageRelationship =
      wdPackage
      .GetRelationshipsByType(documentRelationshipType)
      .FirstOrDefault();
    if (docPackageRelationship != null)
    {
        Uri documentUri =
            PackUriHelper
            .ResolvePartUri(
               new Uri("/", UriKind.Relative),
                     docPackageRelationship.TargetUri);
        PackagePart documentPart =
            wdPackage.GetPart(documentUri);

        //  Load the document XML in the part into an XDocument instance.  
        xDoc = XDocument.Load(XmlReader.Create(documentPart.GetStream()));

        //  Find the styles part. There will only be one.  
        PackageRelationship styleRelation =
          documentPart.GetRelationshipsByType(stylesRelationshipType)
          .FirstOrDefault();
        if (styleRelation != null)
        {
            Uri styleUri = PackUriHelper.ResolvePartUri(documentUri, styleRelation.TargetUri);
            PackagePart stylePart = wdPackage.GetPart(styleUri);

            //  Load the style XML in the part into an XDocument instance.  
            styleDoc = XDocument.Load(XmlReader.Create(stylePart.GetStream()));
        }
    }
}

string defaultStyle =
    (string)(
        from style in styleDoc.Root.Elements(w + "style")
        where (string)style.Attribute(w + "type") == "paragraph" &&
              (string)style.Attribute(w + "default") == "1"
        select style
    ).First().Attribute(w + "styleId");

// Find all paragraphs in the document.  
var paragraphs =
    from para in xDoc
                 .Root
                 .Element(w + "body")
                 .Descendants(w + "p")
    let styleNode = para
                    .Elements(w + "pPr")
                    .Elements(w + "pStyle")
                    .FirstOrDefault()
    select new
    {
        ParagraphNode = para,
        StyleName = styleNode != null ?
            (string)styleNode.Attribute(w + "val") :
            defaultStyle
    };

// Retrieve the text of each paragraph.  
var paraWithText =
    from para in paragraphs
    select new
    {
        ParagraphNode = para.ParagraphNode,
        StyleName = para.StyleName,
        Text = ParagraphText(para.ParagraphNode)
    };

foreach (var p in paraWithText)
{
    if (p.StyleName=="Heading2")
    {
        Response.Write(p.StyleName + " -" + p.Text);
        Response.Write("</br>");
    }
}

Answer 1

这是Bookmark我创建的一个示例类，用于演示如何处理书签。它查找w:bookmarkStart和w:bookmarkEnd元素对，并显示如何获取w:r这两个标记之间的元素。基于此，您可以处理文本，例如，如GetValue()方法中所示。

using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;
using OpenXmlPowerTools;

namespace CodeSnippets.OpenXml.Wordprocessing
{
    /// <summary>
    /// Represents a corresponding pair of w:bookmarkStart and w:bookmarkEnd elements.
    /// </summary>
    public class Bookmark
    {
        private Bookmark(XElement root, string bookmarkName)
        {
            Root = root;

            BookmarkStart = new XElement(W.bookmarkStart,
                new XAttribute(W.id, -1),
                new XAttribute(W.name, bookmarkName));

            BookmarkEnd = new XElement(W.bookmarkEnd,
                new XAttribute(W.id, -1));
        }

        private Bookmark(XElement root, XElement bookmarkStart, XElement bookmarkEnd)
        {
            Root = root;
            BookmarkStart = bookmarkStart;
            BookmarkEnd = bookmarkEnd;
        }

        /// <summary>
        /// The root element containing both <see cref="BookmarkStart"/> and
        /// <see cref="BookmarkEnd"/>.
        /// </summary>
        public XElement Root { get; }

        /// <summary>
        /// The w:bookmarkStart element.
        /// </summary>
        public XElement BookmarkStart { get; }

        /// <summary>
        /// The w:bookmarkEnd element.
        /// </summary>
        public XElement BookmarkEnd { get; }

        /// <summary>
        /// Finds a pair of w:bookmarkStart and w:bookmarkEnd elements in the given
        /// <paramref name="root"/> element, where the w:name attribute value of the
        /// w:bookmarkStart element is equal to <paramref name="bookmarkName"/>.
        /// </summary>
        /// <param name="root">The root <see cref="XElement"/>.</param>
        /// <param name="bookmarkName">The bookmark name.</param>
        /// <returns>A new <see cref="Bookmark"/> instance representing the bookmark.</returns>
        public static Bookmark Find(XElement root, string bookmarkName)
        {
            XElement bookmarkStart = root
                .Descendants(W.bookmarkStart)
                .FirstOrDefault(e => (string) e.Attribute(W.name) == bookmarkName);

            string id = bookmarkStart?.Attribute(W.id)?.Value;
            if (id == null) return new Bookmark(root, bookmarkName);

            XElement bookmarkEnd = root
                .Descendants(W.bookmarkEnd)
                .FirstOrDefault(e => (string) e.Attribute(W.id) == id);

            return bookmarkEnd != null
                ? new Bookmark(root, bookmarkStart, bookmarkEnd)
                : new Bookmark(root, bookmarkName);
        }

        /// <summary>
        /// Gets all w:r elements between the bookmark's w:bookmarkStart and
        /// w:bookmarkEnd elements.
        /// </summary>
        /// <returns>A collection of w:r elements.</returns>
        public IEnumerable<XElement> GetRuns()
        {
            return Root
                .Descendants()
                .SkipWhile(d => d != BookmarkStart)
                .Skip(1)
                .TakeWhile(d => d != BookmarkEnd)
                .Where(d => d.Name == W.r);
        }

        /// <summary>
        /// Gets the concatenated inner text of all runs between the bookmark's
        /// w:bookmarkStart and w:bookmarkEnd elements, ignoring paragraph marks
        /// and page breaks.
        /// </summary>
        /// <remarks>
        /// The output of this method can be compared to the output of the
        /// <see cref="XElement.Value"/> property.
        /// </remarks>
        /// <returns>The concatenated inner text.</returns>
        public string GetValue()
        {
            return GetRuns().Select(UnicodeMapper.RunToString).StringConcatenate();
        }
    }
}

上面的类处理如下文档（非常简单的测试文档）：

<?xml version="1.0" encoding="utf-8"?>
<w:document xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main">
  <w:body>
    <w:p>
      <w:r>
        <w:t>First</w:t>
      </w:r>
    </w:p>
    <w:bookmarkStart w:id="1" w:name="_Bm001" />
    <w:p>
      <w:r>
        <w:t>Second</w:t>
      </w:r>
    </w:p>
    <w:p>
      <w:r>
        <w:t>Third</w:t>
      </w:r>
    </w:p>
    <w:bookmarkEnd w:id="1" />
    <w:p>
      <w:r>
        <w:t>Fourth</w:t>
      </w:r>
    </w:p>
  </w:body>
</w:document>

上述文档是通过以下单元测试创​​建的，演示了如何使用该类Bookmark：

using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Xml.Linq;
using CodeSnippets.OpenXml.Wordprocessing;
using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using OpenXmlPowerTools;
using Xunit;

namespace CodeSnippets.Tests.OpenXml.Wordprocessing
{
    public class BookmarkTests
    {
        /// <summary>
        /// The w:name value of our bookmark.
        /// </summary>
        private const string BookmarkName = "_Bm001";

        /// <summary>
        /// The w:id value of our bookmark.
        /// </summary>
        private const int BookmarkId = 1;

        /// <summary>
        /// The test w:document with our bookmark, which encloses the two runs
        /// with inner texts "Second" and "Third".
        /// </summary>
        private static readonly XElement Document =
            new XElement(W.document,
                new XAttribute(XNamespace.Xmlns + "w", W.w.NamespaceName),
                new XElement(W.body,
                    new XElement(W.p,
                        new XElement(W.r,
                            new XElement(W.t, "First"))),
                    new XElement(W.bookmarkStart,
                        new XAttribute(W.id, BookmarkId),
                        new XAttribute(W.name, BookmarkName)),
                    new XElement(W.p,
                        new XElement(W.r,
                            new XElement(W.t, "Second"))),
                    new XElement(W.p,
                        new XElement(W.r,
                            new XElement(W.t, "Third"))),
                    new XElement(W.bookmarkEnd,
                        new XAttribute(W.id, BookmarkId)),
                    new XElement(W.p,
                        new XElement(W.r,
                            new XElement(W.t, "Fourth")))
                )
            );

        /// <summary>
        /// Creates a <see cref="WordprocessingDocument"/> for on a <see cref="MemoryStream"/>
        /// testing purposes, using the given <paramref name="document"/> as the w:document
        /// root element of the main document part.
        /// </summary>
        /// <param name="document">The w:document root element.</param>
        /// <returns>The <see cref="MemoryStream"/> containing the <see cref="WordprocessingDocument"/>.</returns>
        private static MemoryStream CreateWordprocessingDocument(XElement document)
        {
            var stream = new MemoryStream();
            const WordprocessingDocumentType type = WordprocessingDocumentType.Document;

            using (WordprocessingDocument wordDocument = WordprocessingDocument.Create(stream, type))
            {
                MainDocumentPart part = wordDocument.AddMainDocumentPart();
                part.PutXDocument(new XDocument(document));
            }

            return stream;
        }

        [Fact]
        public void GetRuns_WordprocessingDocumentWithBookmarks_CorrectRunsReturned()
        {
            // Arrange.
            // Create a new Word document on a Stream, using the test w:document
            // as the main document part.
            Stream stream = CreateWordprocessingDocument(Document);

            // Open the WordprocessingDocument on the Stream, using the Open XML SDK.
            using WordprocessingDocument wordDocument = WordprocessingDocument.Open(stream, true);

            // Get the w:document element from the main document part and find
            // our bookmark.
            XElement document = wordDocument.MainDocumentPart.GetXElement();
            Bookmark bookmark = Bookmark.Find(document, BookmarkName);

            // Act, getting the bookmarked runs.
            IEnumerable<XElement> runs = bookmark.GetRuns();

            // Assert.
            Assert.Equal(new[] {"Second", "Third"}, runs.Select(run => run.Value));
        }

        [Fact]
        public void GetText_WordprocessingDocumentWithBookmarks_CorrectRunsReturned()
        {
            // Arrange.
            // Create a new Word document on a Stream, using the test w:document
            // as the main document part.
            Stream stream = CreateWordprocessingDocument(Document);

            // Open the WordprocessingDocument on the Stream, using the Open XML SDK.
            using WordprocessingDocument wordDocument = WordprocessingDocument.Open(stream, true);

            // Get the w:document element from the main document part and find
            // our bookmark.
            XElement document = wordDocument.MainDocumentPart.GetXElement();
            Bookmark bookmark = Bookmark.Find(document, BookmarkName);

            // Act, getting the concatenated text contents of the bookmarked runs.
            string text = bookmark.GetValue();

            // Assert.
            Assert.Equal("SecondThird", text);
        }
    }
}

您可以在我的CodeSnippets GitHub 存储库中找到完整的代码示例。查找Bookmark和BookmarkTests类，并注意我正在使用Open-Xml-PowerTools。

显然，您可以使用这些 Open XML 元素做更复杂的事情。这只是一个简单的例子。