Aspose.Plugins.AsposeVSOpenXML.Program.ChangeHeader C# (CSharp) Method

        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 });
                }
            }
        }