public void Merge(Stream doc1, Stream doc2)
{
var wordDoc = WordprocessingDocument.Open(doc1, true);
var mainPart = wordDoc.MainDocumentPart;
var chunk = mainPart.AddAlternativeFormatImportPart(
DocumentFormat.OpenXml.Packaging.AlternativeFormatImportPartType.WordprocessingML);
doc2.Position = 0;
chunk.FeedData(doc2);
var altChunkId = mainPart.GetIdOfPart(chunk);
var altChunk = new DocumentFormat.OpenXml.Wordprocessing.AltChunk();
altChunk.Id = altChunkId;
Paragraph para = new Paragraph(new Run((new Break()
{
Type = BreakValues.Page
})));
mainPart.Document.Body.InsertAfter(para, mainPart.Document.Body.LastChild);
mainPart.Document.Body.InsertAfter(altChunk, mainPart.Document.Body.LastChild);
wordDoc.Close();
}
void AddAltChunk(MainDocumentPart mainPart, Word.SdtElement sdt, SPFile filename)
{
string altChunkId = "AltChunkId" + id;
id++;
byte[] byteArray = filename.OpenBinary();
AlternativeFormatImportPart chunk = mainPart.AddAlternativeFormatImportPart(
AlternativeFormatImportPartType.WordprocessingML, altChunkId);
using (MemoryStream mem = new MemoryStream())
{
mem.Write(byteArray, 0, (int)byteArray.Length);
mem.Seek(0, SeekOrigin.Begin);
chunk.FeedData(mem);
}
Word.AltChunk altChunk = new Word.AltChunk();
altChunk.Id = altChunkId;
// Replace content control with altChunk information.
OpenXmlElement parent = sdt.Parent;
parent.InsertAfter(altChunk, sdt);
sdt.Remove();
}