文件结构
+DocxToTextDemo
+bin
+Debug
-DocxToTextDemo.vshost.exe
-ICSharpCode.SharpZipLib.dll
+Release
-DocxToTextDemo.exe
-ICSharpCode.SharpZipLib.dll
-DocxToText.cs
-DocxToTextDemo.csproj
-Form1.cs
-Form1.Designer.cs
-Form1.resx
+obj
+Debug
+TempPE
-Program.cs
+Properties
-AssemblyInfo.cs
-Resources.Designer.cs
-Resources.resx
-Settings.Designer.cs
-Settings.settings
-DocxToTextDemo.sln
-DocxToTextDemo.suo
说明
// DocxToText.cs
// Copyright (C) 2007 Eugene Pankov
//
using System;
using System.IO;
using System.Text;
using System.Xml;
using ICSharpCode.SharpZipLib.Zip;
namespace DocxToTextDemo
{
public class DocxToText
{
private const string ContentTypeNamespace =
@"http://schemas.openxmlformats.org/package/2006/content-types";
private const string WordprocessingMlNamespace =
@"http://schemas.openxmlformats.org/wordprocessingml/2006/main";
private const string DocumentXmlXPath =
"/t:Types/t:Override[@ContentType=\"application/vnd.openxmlformats-officedocument.wordprocessingml.document.main+xml\"]";
private const string BodyXPath = "/w:document/w:body";
private string docxFile = "";
private string docxFileLocation = "";
public DocxToText(string fileName)
{
docxFile = fileName;
}
#region ExtractText()
/// <summary>
/// Extracts text from the Docx file.
/// </summary>
/// <returns>Extracted text.</returns>
public string ExtractText()
{
if (string.IsNullOrEmpty(docxFile))
throw new Exception("Input file not specified.");
// Usually it is "/word/document.xml"
docxFileLocation = FindDocumentXmlLocation();
if (string.IsNullOrEmpty(docxFileLocation))
throw new Exception("It is not a valid Docx file.");
return ReadDocumentXml();
}
#endregion
#region FindDocumentXmlLocation()
/// <summary>
/// Gets location of the "document.xml" zip entry.
/// </summary>
/// <returns>Location of the "document.xml".</returns>
private string FindDocumentXmlLocation()
{
ZipFile zip = new ZipFile(docxFile);
foreach (ZipEntry entry in zip)
{
// Find "[Content_Types].xml" zip entry
if (string.Compare(entry.Name, "[Content_Types].xml", true) == 0)
{
Stream contentTypes = zip.GetInputStream(entry);
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.PreserveWhitespace = true;
xmlDoc.Load(contentTypes);
contentTypes.Close();
//Create an XmlNamespaceManager for resolving namespaces
XmlNamespaceManager nsmgr = new XmlNamespaceManager(xmlDoc.NameTable);
nsmgr.AddNamespace("t", ContentTypeNamespace);
// Find location of "document.xml"
XmlNode node = xmlDoc.DocumentElement.SelectSingleNode(DocumentXmlXPath, nsmgr);
if (node != null)
{
string location = ((XmlElement) node).GetAttribute("PartName");
return location.TrimStart(new char[] {'/'});
}
break;
}
}
zip.Close();
return null;
}
#endregion
#region ReadDocumentXml()
/// <summary>
/// Reads "document.xml" zip entry.
/// </summary>
/// <returns>Text containing in the document.</returns>
private string ReadDocumentXml()
{
StringBuilder sb = new StringBuilder();
ZipFile zip = new ZipFile(docxFile);
foreach (ZipEntry entry in zip)
{
if (string.Compare(entry.Name, docxFileLocation, true) == 0)
{
Stream documentXml = zip.GetInputStream(entry);
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.PreserveWhitespace = true;
xmlDoc.Load(documentXml);
documentXml.Close();
XmlNamespaceManager nsmgr = new XmlNamespaceManager(xmlDoc.NameTable);
nsmgr.AddNamespace("w", WordprocessingMlNamespace);
XmlNode node = xmlDoc.DocumentElement.SelectSingleNode(BodyXPath, nsmgr);
if (node == null)
return string.Empty;
sb.Append(ReadNode(node));
break;
}
}
zip.Close();
return sb.ToString();
}
#endregion
#region ReadNode()
/// <summary>
/// Reads content of the node and its nested childs.
/// </summary>
/// <param name="node">XmlNode.</param>
/// <returns>Text containing in the node.</returns>
private string ReadNode(XmlNode node)
{
if (node == null || node.NodeType != XmlNodeType.Element)
return string.Empty;
StringBuilder sb = new StringBuilder();
foreach (XmlNode child in node.ChildNodes)
{
if (child.NodeType != XmlNodeType.Element) continue;
switch (child.LocalName)
{
case "t": // Text
sb.Append(child.InnerText.TrimEnd());
string space = ((XmlElement)child).GetAttribute("xml:space");
if (!string.IsNullOrEmpty(space) && space == "preserve")
sb.Append(' ');
break;
case "cr": // Carriage return
case "br": // Page break
sb.Append(Environment.NewLine);
break;
case "tab": // Tab
sb.Append("\t");
break;
case "p": // Paragraph
sb.Append(ReadNode(child));
sb.Append(Environment.NewLine);
sb.Append(Environment.NewLine);
break;
default:
sb.Append(ReadNode(child));
break;
}
}
return sb.ToString();
}
#endregion
}
}
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