How to Insert Text Watermark in Word with VB.NET - asp.net

Question

I need to insert text diagonal Watermark, in a word file with OpenXML, I use the following steps to open the file:
Dim wordmlNamespace As String = "http://schemas.openxmlformats.org/wordprocessingml/2006/main"
Using wdDoc As WordprocessingDocument = WordprocessingDocument.Open(newPath, True)
'AddWatermarkFunction()
wdDoc.MainDocumentPart.Document.Save()
wdDoc.Close()
End Using
I have already seen this link, but I can not play the correct functioning.
UPDATE
I tried to write the following code (replaces 'AddWatermarkFunction() of the above code), but I do not print the watermark
If wdDoc.MainDocumentPart.HeaderParts IsNot Nothing Then
If wdDoc.MainDocumentPart.HeaderParts IsNot Nothing Then
For Each Headerpart In wdDoc.MainDocumentPart.HeaderParts
Dim r As DocumentFormat.OpenXml.Wordprocessing.Run = CreateWatermarkRun("watermarkText")
Dim para As New DocumentFormat.OpenXml.Wordprocessing.Paragraph
para.Append(r)
Headerpart.Header.Save(Headerpart)
Next
End If
End If
the function "CreateWatermarkRun":
Private Function CreateWatermarkRun(ByVal name As String) As DocumentFormat.OpenXml.Wordprocessing.Run
Dim runWatermark As New DocumentFormat.OpenXml.Wordprocessing.Run()
Dim runWMProperties As New DocumentFormat.OpenXml.Wordprocessing.RunProperties()
Dim noProofWM As New DocumentFormat.OpenXml.Wordprocessing.NoProof()
Try
runWMProperties.Append(noProofWM)
Dim pictureWM As New DocumentFormat.OpenXml.Wordprocessing.Picture()
Dim shapetypeWM As New DocumentFormat.OpenXml.Vml.Shapetype() With
{ _
.Id = "_x0000_t136", _
.CoordinateSize = "21600,21600", _
.OptionalNumber = 136, _
.Adjustment = "10800", _
.EdgePath = "m#7,l#8,m#5,21600l#6,21600e" _
}
Dim formulasWM As New DocumentFormat.OpenXml.Vml.Formulas()
Dim formula1 As New DocumentFormat.OpenXml.Vml.Formula() With { _
.Equation = "sum #0 0 10800" _
}
Dim formula2 As New DocumentFormat.OpenXml.Vml.Formula() With { _
.Equation = "prod #0 2 1" _
}
Dim formula3 As New DocumentFormat.OpenXml.Vml.Formula() With { _
.Equation = "sum 21600 0 #1" _
}
Dim formula4 As New DocumentFormat.OpenXml.Vml.Formula() With { _
.Equation = "sum 0 0 #2" _
}
Dim formula5 As New DocumentFormat.OpenXml.Vml.Formula() With { _
.Equation = "sum 21600 0 #3" _
}
Dim formula6 As New DocumentFormat.OpenXml.Vml.Formula() With { _
.Equation = "if #0 #3 0" _
}
Dim formula7 As New DocumentFormat.OpenXml.Vml.Formula() With { _
.Equation = "if #0 21600 #1" _
}
Dim formula8 As New DocumentFormat.OpenXml.Vml.Formula() With { _
.Equation = "if #0 0 #2" _
}
Dim formula9 As New DocumentFormat.OpenXml.Vml.Formula() With { _
.Equation = "if #0 #4 21600" _
}
Dim formula10 As New DocumentFormat.OpenXml.Vml.Formula() With { _
.Equation = "mid #5 #6" _
}
Dim formula11 As New DocumentFormat.OpenXml.Vml.Formula() With { _
.Equation = "mid #8 #5" _
}
Dim formula12 As New DocumentFormat.OpenXml.Vml.Formula() With { _
.Equation = "mid #7 #8" _
}
Dim formula13 As New DocumentFormat.OpenXml.Vml.Formula() With { _
.Equation = "mid #6 #7" _
}
Dim formula14 As New DocumentFormat.OpenXml.Vml.Formula() With { _
.Equation = "sum #6 0 #5" _
}
formulasWM.Append(formula1)
formulasWM.Append(formula2)
formulasWM.Append(formula3)
formulasWM.Append(formula4)
formulasWM.Append(formula5)
formulasWM.Append(formula6)
formulasWM.Append(formula7)
formulasWM.Append(formula8)
formulasWM.Append(formula9)
formulasWM.Append(formula10)
formulasWM.Append(formula11)
formulasWM.Append(formula12)
formulasWM.Append(formula13)
formulasWM.Append(formula14)
Dim pathWM As New DocumentFormat.OpenXml.Vml.Path() With { _
.AllowTextPath = True, _
.ConnectionPointType = DocumentFormat.OpenXml.Vml.Office.ConnectValues.[Custom], _
.ConnectionPoints = "#9,0;#10,10800;#11,21600;#12,10800", _
.ConnectAngles = "270,180,90,0" _
}
Dim textPathWM As New DocumentFormat.OpenXml.Vml.TextPath() With { _
.[On] = True, _
.FitShape = True _
}
Dim shapeHandlesWM As New DocumentFormat.OpenXml.Vml.ShapeHandles()
Dim shapeHandleWM As New DocumentFormat.OpenXml.Vml.ShapeHandle() With { _
.Position = "#0,bottomRight", _
.XRange = "6629,14971" _
}
shapeHandlesWM.Append(shapeHandleWM)
Dim lockWM As New DocumentFormat.OpenXml.Vml.Office.Lock() With { _
.Extension = DocumentFormat.OpenXml.Vml.ExtensionHandlingBehaviorValues.Edit, _
.TextLock = True, _
.ShapeType = True _
}
shapetypeWM.Append(formulasWM)
shapetypeWM.Append(pathWM)
shapetypeWM.Append(textPathWM)
shapetypeWM.Append(shapeHandlesWM)
shapetypeWM.Append(lockWM)
Dim shapeWM As New DocumentFormat.OpenXml.Vml.Shape() With { _
.Id = "PowerPlusWaterMarkObject346762751", _
.Style = "position:absolute;margin-left:0;margin-top:0;width:527.85pt;height:131.95pt;rotation:315;z-index:-251655168;mso-position-horizontal:center;mso-position-horizontal-relative:margin;mso-position-vertical:center;mso-position-vertical-relative:margin", _
.OptionalString = "_x0000_s2050", _
.AllowInCell = False, _
.FillColor = "silver", _
.Stroked = False, _
.Type = "#_x0000_t136" _
}
Dim fillWM As New DocumentFormat.OpenXml.Vml.Fill() With { _
.Opacity = ".5" _
}
Dim textPath2WM As New DocumentFormat.OpenXml.Vml.TextPath() With { _
.Style = "font-family:""Arial"";font-size:1pt", _
.[String] = name _
}
shapeWM.Append(fillWM)
shapeWM.Append(textPath2WM)
pictureWM.Append(shapetypeWM)
pictureWM.Append(shapeWM)
runWatermark.Append(runWMProperties)
runWatermark.Append(pictureWM)
Return runWatermark
Catch ex As Exception
ex.Message.ToString()
End Try
End Function
Any suggestions?

Answer 1

I found the solution, missing only the portion of the code that added a paragraph to the document that is
....
Dim para As New DocumentFormat.OpenXml.Wordprocessing.Paragraph
DocumentFormat.OpenXml.Wordprocessing.Paragraph)()
para.Append(r)
Headerpart.Header.Append(para) 'missing code
Headerpart.Header.Save(Headerpart)