问题
I would like to embed one Word document (call it "hidden.docx") into another Word document (call it "host.docx"). The document hidden.docx would not be visible at all when host.docx is opened in Word by an end-user. Document hidden.docx would only be carried inside host.docx, sort of as unstructured cargo data.
All research I have done points me to the use of something called altChunk offered by the Open XML SDK. I have installed Open XML SDK and got a sample working: http://msdn.microsoft.com/en-us/library/gg490656%28v=office.14%29.aspx
My question: In order to insert an altChunk into a docx, do I really need the Open XML SDK? Can this not be accomplished using VSTO? If so, how?
[PS: My ultimate goal is, for a pair of documents where one document is the original text and the other is its translated version in another language, to be able to preserve the original document within the translated document, so as not to lose it. For any document pair, there's always the risk that the two documents become separated through misplacement of one of them.]
回答1:
Yes and No.
1.) That's not what AltChunks do. AltChunks are a way to embed one document into another document such that they get merged together. They are not hidden. If you create a docx package with an AltChunk in it, and then open up Word, Word will immediately merge that AltChunk into the document. (If that AltChunk is another Word document that also contains child AltChunks they will be recursively merged into the parent as well.) Basically, it's an easy way to merge content together without having to reconsolidate all their styles, rIDs, etc. -- if you save the document and examine it, the AltChunk will be gone, and you will notice that Word has merged the document back together into a single document again.
2.) Range.InsertXML, if provided a valid Flat Package for a full Word document will, under the hood, invoke that same merge functionality (down to having the same bugs, etc.) that you would get from an AltChunk. The two behave identical, and you can even create a document package with the OpenXML SDK that contains embedded AltChunks, and insert those (I've done this in Word 2007, 2010, and 2013) -- of course, as I mentioned above, the AltChunks are never persisted, they're immediately merged into the document.
If you want to save hidden data in a document, I recommend using Custom XML (take a look at Document.CustomXMLParts). Keep in mind though, at least in Word 2010, Undo does not revert changes to CustomXML parts.
回答2:
If you simply want to include some file into the Open XML package, then the simplest way is to use API from the System.IO.Packaging namespace (First obtain the reference to the main document part of the host part):
EmbeddedPackagePart hiddenDocumentPart = mainDocumentPart.AddEmbeddedPackagePart(@"application/vnd.openxmlformats-officedocument.wordprocessingml.document");
hiddenDocumentPart.FeedData(File.Open(hiddenDocumentFile, FileMode.Open));
Just to be sure, this way the hidden document will be in no way part of the host document content. It will only be part of its file (package). You can later extract it with a similar method: Get the main part of the host document, find the embedded (hidden) part and get/read the data from it.
来源：https://stackoverflow.com/questions/18278471/can-i-use-vsto-instead-of-open-xml-to-manipulate-altchunk-features