当然要先添加对Word的组件的引用,添加命名空间的引用,代码: 
 Word.Application oWord;
 Word._Document oDoc;
 object oMissing = Missing.Value;
 object docBuiltInProps; 
 object Source = @"DocPath";
 object Unknown =Type.Missing;
 oWord = new Word.Application();
 try
 {
 oDoc = oWord.Documents.Open(ref Source,ref Unknown,
 ref Unknown,ref Unknown,ref Unknown,
 ref Unknown,ref Unknown,ref Unknown,
 ref Unknown,ref Unknown,ref Unknown,
 ref Unknown ); 
 docBuiltInProps = oDoc.BuiltInDocumentProperties;
 Type typeDocBuiltInProps = docBuiltInProps.GetType();
 //获取作者
 string index = "Author";
 string propsValue;
 object docAuthor = typeDocBuiltInProps.InvokeMember("Item",
 BindingFlags.Default |
 BindingFlags.GetProperty,
 null,docBuiltInProps,
 new object[] {index} );
 Type typeDocAuthorProp = docAuthor.GetType();
 propsValue = http://www.jslnfj.com/dnbaike/21049/typeDocAuthorProp.InvokeMember("Value",
 BindingFlags.Default |
 BindingFlags.GetProperty,
 null,docAuthor,
 new object[] {} ).ToString();
 MessageBox.Show( propsValue,"Author" ); 
 //获取主题
 index = "Subject";
 propsValue = http://www.jslnfj.com/dnbaike/21049/"The Subject";
 object docSubjectProp = typeDocBuiltInProps.InvokeMember("Item",
 BindingFlags.Default |
 BindingFlags.GetProperty,
 null,docBuiltInProps,
 new object[] {index} );
 Type typeDocSubjectProp = docSubjectProp.GetType();
 propsValue = http://www.jslnfj.com/dnbaike/21049/typeDocSubjectProp.InvokeMember("Value",
 BindingFlags.Default |BindingFlags.GetProperty,
 null,docSubjectProp,
 new object[] {} ).ToString();
 MessageBox.Show( propsValue,"Subject" ); 
【获取Word文档的作者和主题帮助升级的技巧】 }
 finally
 {
 //关闭word进程
 object save = false;
 oWord.Quit(ref save,ref Unknown,ref Unknown);
 System.Runtime.InteropServices.Marshal.ReleaseComObject(oWord);
 } 
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