How do I save Xml Changes Back to the Original Document - ms-word

Question

I need to update the Styles (styles.xml) part of an MS Word document due to a problem with a vendor's product.
So far I've been able to extract and update the xml I need. The only problem, is that I don't know how to save my changes back to the document.
The code below is working just fine. I usually output the xml to the console to make sure it's going in just fine. At the end, I know I need to perform some save operation, but the XDocument.Save( /stream/) hasn't worked.
Here's where I am so far
static void FixNormal()
{
using (WordprocessingDocument doc = WordprocessingDocument.Open(_path, true))
{
// Get the Styles part for this document.
StyleDefinitionsPart stylesPart = doc.MainDocumentPart.StyleDefinitionsPart;
// If the Styles part does not exist, add it and then add the style.
if (stylesPart == null)
{
Console.WriteLine("No Style Part");
}
else
{
XDocument stylesDoc;
using (var reader = XmlNodeReader.Create(stylesPart.GetStream(FileMode.Open, FileAccess.Read)))
{
XNamespace w = "http://schemas.openxmlformats.org/wordprocessingml/2006/main";
Console.WriteLine(stylesPart.Styles.OuterXml);
// Create the XDocument.
stylesDoc = XDocument.Load(reader);
var xStyle = stylesDoc.Descendants(w + "styles").Descendants(w + "style").Where(x => x.Attribute(w + "styleId").Value.Equals("Normal"));
XElement style = xStyle.Single();
var q = style.Descendants(w + "qFormat").FirstOrDefault();
if (q is null)
{
XElement qFormat = new XElement(w + "qFormat");
style.Add(qFormat);
}
var r = style.Descendants(w + "rsid").FirstOrDefault();
if (r is null)
{
XElement rsid = new XElement(w + "rsid");
XAttribute val = new XAttribute(w + "val", "003C4F1E");
rsid.Add(val);
style.Add(rsid);
}
}
//doc.Save(); --- Did not work
}
}
}

Answer 1

I found the answer in the SAVE THE PARTS section of this page Replace the styles parts in a word processing document (Open XML SDK)
See the end of this code for the solution. You'll also see what I've tried.
static void FixNormal()
{
using (WordprocessingDocument doc = WordprocessingDocument.Open(_path, true))
{
// Get the Styles part for this document.
StyleDefinitionsPart stylesPart = doc.MainDocumentPart.StyleDefinitionsPart;
// If the Styles part does not exist, add it and then add the style.
if (stylesPart == null)
{
Console.WriteLine("No Style Part");
}
else
{
XDocument stylesDoc;
using (var reader = XmlNodeReader.Create(stylesPart.GetStream(FileMode.Open, FileAccess.Read)))
{
XNamespace w = "http://schemas.openxmlformats.org/wordprocessingml/2006/main";
// Create the XDocument.
stylesDoc = XDocument.Load(reader);
var xStyle = stylesDoc.Descendants(w + "styles").Descendants(w + "style").Where(x => x.Attribute(w + "styleId").Value.Equals("Normal"));
XElement style = xStyle.Single();
var q = style.Descendants(w + "qFormat").FirstOrDefault();
if (q is null)
{
XElement qFormat = new XElement(w + "qFormat");
style.Add(qFormat);
}
var r = style.Descendants(w + "rsid").FirstOrDefault();
if (r is null)
{
XElement rsid = new XElement(w + "rsid");
XAttribute val = new XAttribute(w + "val", "003C4F1E");
rsid.Add(val);
style.Add(rsid);
}
}
//doc.Save(); --- Did not work
//stylesDoc.Save(#"C:\WinTest\HooRah.xml"); -- I only use this to verify that I've updated everything correctly
//using (XmlWriter xw = XmlWriter.Create(stylesPart.GetStream(FileMode.Create, FileAccess.Write)))
//{
// stylesDoc.Save(xw); -- DID NOT WORK EITHER
// doc.Save();
//}
// THIS WORKED
stylesDoc.Save(new StreamWriter(stylesPart.GetStream(FileMode.Create, FileAccess.Write)));
}
}
}