全文转载自：http://msdn.microsoft.com/zh-cn/library/bb669125.aspx

本主题显演示一个打开、修改和保存 Office Open XML 文档的示例。

有关 Office Open XML 的更多信息，请参见 www.openxmldeveloper.org（可能为英文网页）。

示例

本示例查找文档中的第一个段落元素。 示例从段落中检索文本，然后删除段落中的所有文本域。 它创建一个由第一个段落已转换为大写的文本构成的新文本域。 然后将已更改的 XML 序列化为 Open XML 包并关闭该包。

本示例使用 WindowsBase 程序集中的类。 它使用 System.IO.Packaging 命名空间中的类型。

public static class LocalExtensions
{public static string StringConcatenate(this IEnumerable<string> source){StringBuilder sb = new StringBuilder();foreach (string s in source)sb.Append(s);return sb.ToString();}public static string StringConcatenate<T>(this IEnumerable<T> source,Func<T, string> func){StringBuilder sb = new StringBuilder();foreach (T item in source)sb.Append(func(item));return sb.ToString();}public static string StringConcatenate(this IEnumerable<string> source, string separator){StringBuilder sb = new StringBuilder();foreach (string s in source)sb.Append(s).Append(separator);return sb.ToString();}public static string StringConcatenate<T>(this IEnumerable<T> source,Func<T, string> func, string separator){StringBuilder sb = new StringBuilder();foreach (T item in source)sb.Append(func(item)).Append(separator);return sb.ToString();}
}class Program
{public static string ParagraphText(XElement e){XNamespace w = e.Name.Namespace;return e.Elements(w + "r").Elements(w + "t").StringConcatenate(element => (string)element);}static void Main(string[] args){const string fileName = "SampleDoc.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;using (Package wdPackage = Package.Open(fileName, FileMode.Open, FileAccess.ReadWrite)){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.XDocument xDoc = XDocument.Load(XmlReader.Create(documentPart.GetStream()));//  Find the styles part. There will only be one.PackageRelationship styleRelation =documentPart.GetRelationshipsByType(stylesRelationshipType).FirstOrDefault();PackagePart stylePart = null;XDocument styleDoc = null;if (styleRelation != null){Uri styleUri = PackUriHelper.ResolvePartUri(documentUri, styleRelation.TargetUri);stylePart = wdPackage.GetPart(styleUri);//  Load the style XML in the part into an XDocument instance.styleDoc = XDocument.Load(XmlReader.Create(stylePart.GetStream()));}XElement paraNode = xDoc.Root.Element(w + "body").Descendants(w + "p").FirstOrDefault();string paraText = ParagraphText(paraNode);// remove all text runsparaNode.Descendants(w + "r").Remove();paraNode.Add(new XElement(w + "r",new XElement(w + "t", paraText.ToUpper())));//  Save the XML into the packageusing (XmlWriter xw =XmlWriter.Create(documentPart.GetStream(FileMode.Create, FileAccess.Write))){xDoc.Save(xw);}Console.WriteLine("New first paragraph: >{0}<", paraText.ToUpper());}}}
}