Add Headers and Footers

VSTO

Word.Application wordApp = Application;
wordApp.Documents.Open("Add Headers and Footers.doc");
//Add Header
foreach (Word.Section section in this.Application.ActiveDocument.Sections)
{
	Word.Range headerRange = section.Headers[Word.WdHeaderFooterIndex.wdHeaderFooterPrimary].Range;
	headerRange.Fields.Add(headerRange, Word.WdFieldType.wdFieldPage);
	headerRange.ParagraphFormat.Alignment = Word.WdParagraphAlignment.wdAlignParagraphRight;
}
//Add Footer
foreach (Word.Section wordSection in this.Application.ActiveDocument.Sections)
{
	Word.Range footerRange = wordSection.Footers[Word.WdHeaderFooterIndex.wdHeaderFooterPrimary].Range;
	footerRange.Font.ColorIndex = Word.WdColorIndex.wdDarkRed;
	footerRange.Font.Size = 20;
	footerRange.Text = "Confidential";
}

Aspose.Words

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

// Create the headers.
builder.MoveToHeaderFooter(HeaderFooterType.HeaderPrimary);
builder.Write("Header Text goes here...");
//add footer having current date
builder.MoveToHeaderFooter(HeaderFooterType.FooterPrimary);
builder.InsertField("Date", "");
doc.UpdateFields();
doc.Save("Insert Headers and Footers.doc");

Download Sample Code

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