/// <summary>
/// Gets the document structure related to watermark description
/// </summary>
/// <returns>Document structure related to watermark description</returns>
public static IEnumerable <XElement> GetWatermark(WmlDocument doc)
{
using (OpenXmlMemoryStreamDocument streamDoc = new OpenXmlMemoryStreamDocument(doc))
using (WordprocessingDocument document = streamDoc.GetWordprocessingDocument())
{
// to get the watermark text, we have to look inside the document
// get the default header reference and get the header reference id part
XElement defaultHeaderReference = HeaderAccessor.GetHeaderReference(document, HeaderType.Default, 0);
if (defaultHeaderReference != null)
{
string headerReferenceId = defaultHeaderReference.Attribute(relationshipsns + "id").Value;
OpenXmlPart headerPart = document.MainDocumentPart.GetPartById(headerReferenceId);
if (headerPart != null)
{
XDocument headerPartXml = headerPart.GetXDocument();
return(headerPartXml.Descendants(ns + "pict"));
}
}
return(null);
}
}
/// <summary>
/// Inserts a watermark text inside a document
/// </summary>
/// <param name="watermarkText">text to show in the watermark</param>
/// <param name="diagonalOrientation">specify that the text orientation will be in a diagonal way</param>
public static OpenXmlPowerToolsDocument InsertWatermark(WmlDocument doc, string watermarkText, bool diagonalOrientation)
{
using (OpenXmlMemoryStreamDocument streamDoc = new OpenXmlMemoryStreamDocument(doc))
{
using (WordprocessingDocument document = streamDoc.GetWordprocessingDocument())
{
Collection <XDocument> headers = new Collection <XDocument>();
if (HeaderAccessor.GetHeaderReference(document, HeaderType.First, 0) == null)
{
headers.Add(HeaderAccessor.AddNewHeader(document, HeaderType.First));
}
else
{
headers.Add(HeaderAccessor.GetHeader(document, HeaderType.First, 0));
}
if (HeaderAccessor.GetHeaderReference(document, HeaderType.Even, 0) == null)
{
headers.Add(HeaderAccessor.AddNewHeader(document, HeaderType.Even));
}
else
{
headers.Add(HeaderAccessor.GetHeader(document, HeaderType.Even, 0));
}
if (HeaderAccessor.GetHeaderReference(document, HeaderType.Default, 0) == null)
{
headers.Add(HeaderAccessor.AddNewHeader(document, HeaderType.Default));
}
else
{
headers.Add(HeaderAccessor.GetHeader(document, HeaderType.Default, 0));
}
foreach (XDocument header in headers)
{
var runElement = header.Descendants(ns + "r").FirstOrDefault();
if (runElement == null)
{
header.Root.Add(
new XElement(ns + "sdt",
new XElement(ns + "sdtContent",
new XElement(ns + "p",
new XElement(ns + "pPr",
new XElement(ns + "pStyle",
new XAttribute(ns + "val", "Header")
)
),
runElement = new XElement(ns + "r")
)
)
)
);
}
runElement.AddBeforeSelf(CreateWatermarkVml(watermarkText, diagonalOrientation));
}
HeaderAccessor.GetHeaderPart(document, HeaderType.First, 0).PutXDocument();
HeaderAccessor.GetHeaderPart(document, HeaderType.Even, 0).PutXDocument();
HeaderAccessor.GetHeaderPart(document, HeaderType.Default, 0).PutXDocument();
}
return(streamDoc.GetModifiedDocument());
}
}
