openxml 中 word 文档的结构是如下图：
其中，页眉是 header，属于headerpart 部件，页脚是footer，属于footerpart 部件，图上还有其他的东西，之后会一一介绍。这些部件都属于MainDocumentPart 部件。之前讲过了 一个包（package）就是一个word文件。
<maindoucmentpart>
<headerpart>
<header>..........其他东西.......</header>
</headerpart>
<document>
<body>.........</body>
</document>
<footerpart>
<footer>........</footer>
</foooterpart>
</maindoucmentpart>
大概是这样子的关系。
页眉和页脚的对应的，页眉有三种，1.首页的页面(选择首页不同的话，这个会显示) 2.偶数页页面（选择奇偶页不同的话，这个会显示），3.默认页面（什么都不选，默认显示这个）。页脚也有三种与页面对应。
添加页眉，页脚的代码如下：
1 using (WordprocessingDocument packaging = WordprocessingDocument.Create("test.docx", WordprocessingDocumentType.Document)) { MainDocumentPart maindocumentpart = packaging.AddNewPart<MainDocumentPart>("application/vnd.openxmlformats-officedocument.wordprocessingml.document.main+xml", "r001"); 2 3 Document doc = new Document(); doc.Body = new Body(); maindocumentpart.Document = doc; maindocumentpart.Document.Body.AppendChild<Paragraph>(new Paragraph(new Run(new Text() { Text = "测试" }))); 4 5 #region 页眉 Header header1 = new Header(new Paragraph(new Run(new Text() { Text = "header1" }))); Header header2 = new Header(new Paragraph(new Run(new Text() { Text = "header2" }))); Header header3 = new Header(new Paragraph(new Run(new Text() { Text = "header3" }))); maindocumentpart.AddNewPart<HeaderPart>("application/vnd.openxmlformats-officedocument.wordprocessingml.header+xml", "r002").Header = header1; maindocumentpart.AddNewPart<HeaderPart>("application/vnd.openxmlformats-officedocument.wordprocessingml.header+xml", "r003").Header = header2; maindocumentpart.AddNewPart<HeaderPart>("application/vnd.openxmlformats-officedocument.wordprocessingml.header+xml", "r004").Header = header3; #endregion 6 7 #region 页脚 Footer footer1 = new Footer(new Paragraph(new Run(new Text() { Text = "footer1" }))); Footer footer2 = new Footer(new Paragraph(new Run(new Text() { Text = "footer2" }))); Footer footer3 = new Footer(new Paragraph(new Run(new Text() { Text = "footer3" }))); maindocumentpart.AddNewPart<FooterPart>("application/vnd.openxmlformats-officedocument.wordprocessingml.footer+xml", "r005").Footer = footer1; maindocumentpart.AddNewPart<FooterPart>("application/vnd.openxmlformats-officedocument.wordprocessingml.footer+xml", "r006").Footer = footer2; maindocumentpart.AddNewPart<FooterPart>("application/vnd.openxmlformats-officedocument.wordprocessingml.footer+xml", "r007").Footer = footer3; #endregion /*设置 页眉，页脚和页面关系*/ SectionProperties sp = new SectionProperties( new HeaderReference() { Id = "r002", Type = HeaderFooterValues.First }, new HeaderReference() { Id = "r003", Type = HeaderFooterValues.Even }, new HeaderReference() { Id = "r004", Type = HeaderFooterValues.Default }, new FooterReference() { Id = "r005", Type = HeaderFooterValues.First }, new FooterReference() { Id = "r006", Type = HeaderFooterValues.Even }, new FooterReference() { Id = "r007", Type = HeaderFooterValues.Default }); maindocumentpart.Document.Body.AppendChild<SectionProperties>(sp); }