public static void ChangeHeader(String documentPath)
{
// Replace header in target document with header of source document.
using (WordprocessingDocument document = WordprocessingDocument.Open(documentPath, true))
{
// Get the main document part
MainDocumentPart mainDocumentPart = document.MainDocumentPart;
// Delete the existing header and footer parts
mainDocumentPart.DeleteParts(mainDocumentPart.HeaderParts);
mainDocumentPart.DeleteParts(mainDocumentPart.FooterParts);
// Create a new header and footer part
HeaderPart headerPart = mainDocumentPart.AddNewPart<HeaderPart>();
FooterPart footerPart = mainDocumentPart.AddNewPart<FooterPart>();
// Get Id of the headerPart and footer parts
string headerPartId = mainDocumentPart.GetIdOfPart(headerPart);
string footerPartId = mainDocumentPart.GetIdOfPart(footerPart);
GenerateHeaderPartContent(headerPart);
GenerateFooterPartContent(footerPart);
// Get SectionProperties and Replace HeaderReference and FooterRefernce with new Id
IEnumerable<SectionProperties> sections = mainDocumentPart.Document.Body.Elements<SectionProperties>();
foreach (var section in sections)
{
// Delete existing references to headers and footers
section.RemoveAllChildren<HeaderReference>();
section.RemoveAllChildren<FooterReference>();
// Create the new header and footer reference node
section.PrependChild<HeaderReference>(new HeaderReference() { Id = headerPartId });
section.PrependChild<FooterReference>(new FooterReference() { Id = footerPartId });
}
}
}