Duplicating Word document using OpenXml and C#

Question

I am using Word and OpenXml to provide mail merge functionality in a C# ASP.NET web application:

1) A document is uploaded with a number of pre-defined strings for s

Answer 1

As an addenda to the above; what's perhaps more useful is finding content controls that have been tagged (using the word GUI). I recently wrote some software that populated document templates that contained content controls with tags attached. To find them is just an extension of the above LINQ query:

var mainDocument = doc.MainDocumentPart.Document;
var taggedContentControls = from sdt in mainDocument.Descendants()
                            let sdtPr = sdt.GetFirstChild()
                            let tag = (sdtPr == null ? null : sdtPr.GetFirstChild())
                            where (tag != null)
                            select new
                            {
                                SdtElem = sdt,
                                TagName = tag.GetAttribute("val", W).Value
                            };   

I got this code from elsewhere but cannot remember where at the moment; full credit goes to them.

The query just creates an IEnumerable of an anonymous type that contains the content control and its associated tag as properties. Handy!