Listing 1

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using Microsoft.SharePoint; 
using Microsoft.SharePoint.Utilities; 
using System.IO; 
using System.IO.Packaging; 
using System.Xml; 
using System.Xml.Linq;

namespace DocxDemo 
{
class Program 
{
static void Main(string[] args) 
{
using (SPSite site = new SPSite("http://localhost")) 
using (SPWeb web = site.OpenWeb()) 
{
SPDocumentLibrary templateLib = 
    web.Lists.Cast<SPList>().FirstOrDefault(list => 
        list.RootFolder.Name == "WordTemplates") as SPDocumentLibrary;
SPDocumentLibrary reportLib = 
    web.Lists.Cast<SPList>().FirstOrDefault(list => 
        list.RootFolder.Name == "WordReports") as SPDocumentLibrary;
SPList dataList = web.Lists.Cast<SPList>().FirstOrDefault(list => 
    list.RootFolder.Name == "Finances");
string templateName = "ReportTemplate.docx"; 
string reportName = String.Format("DailyReport{0}.docx",
    DateTime.Now.ToShortDateString());
string documentUrl = 
    SPUrlUtility.CombineUrl(web.Site.MakeFullUrl
        (templateLib.RootFolder.Url), templateName); 
SPFile template = templateLib.RootFolder.Files[documentUrl]; 
Stream templateStream = template.OpenBinaryStream(); 
Stream documentStream = new MemoryStream(); 
BinaryReader templateReader = new BinaryReader(templateStream); 
BinaryWriter documentWriter = new BinaryWriter(documentStream);
documentWriter.Write(templateReader.ReadBytes((int)templateStream.Length));
documentWriter.Flush(); 
templateReader.Close(); 
templateStream.Dispose();

Package package = Package.Open(documentStream, FileMode.Open,
FileAccess.ReadWrite);

Uri uri = new Uri("/word/document.xml", UriKind.Relative);
PackagePart part = package.GetPart(uri);

Stream partStream = part.GetStream(FileMode.OpenOrCreate, 
    FileAccess.ReadWrite);
XmlReader xmlReader = XmlReader.Create(partStream); 
XDocument doc = XDocument.Load(xmlReader); 
xmlReader.Close();

XElement tablePlaceHolder = doc.Descendants(W.sdt)
    .FirstOrDefault(x => x.Element(W.sdtContent) .Descendants(W.sdt) 
         .FirstOrDefault() != null);

XElement prototype = tablePlaceHolder.Element(W.sdtContent)
   .Descendants(W.tr) .Where(x => x.Descendants(W.sdt) 
         .FirstOrDefault() != null) .FirstOrDefault();

IEnumerable<SPListItem> allItems = dataList.GetItems(new 
   SPQuery()).Cast<SPListItem>();

prototype.Parent.Add(allItems.Select(li =>
{
var result = new XElement(prototype); 
foreach (var placeholder in result.Descendants(W.sdt))
{
string celltag = placeholder.Element(W.sdtPr) 
   .Element(W.tag) .Attribute(W.val) .Value;

if (li.Fields.ContainsField(celltag)) 
{
placeholder.Element(W.sdtContent) .Descendants(W.t)
.Single() .Value = String.Format("{0}", li[celltag]);
} 
else 
{
placeholder.Element(W.sdtContent) .Descendants(W.t)
.Single() .Value = String.Empty;
} 
} 
return result;
}));

prototype.Remove(); 

partStream.SetLength(0);

XmlWriter writer = XmlWriter.Create(partStream); doc.WriteTo(writer); 
    writer.Close(); package.Flush();

string reportUrl = 
    SPUrlUtility.CombineUrl(web.Site.MakeFullUrl(reportLib.RootFolder.Url), 
    templateName);
SPFile report = reportLib.RootFolder.Files.Add(reportUrl, 
    documentStream, true);
SPListItem reportItem = report.Item; 
reportItem["Title"] = reportName; // Set Metadata reportItem.Update();
}
}
}
}