Inserting a watermark image in a word document

Aspose.Words Product Family
1

Hi, in another post () I’ve found following code to insert a watermark image in a word document:

Document doc = new Document(MyDir + "Test.docx");
DocumentBuilder builder = new DocumentBuilder(doc);
Shape watermark = new Shape(doc, ShapeType.Image);
watermark.ImageData.SetImage(MyDir + "school.JPG");
// setting image width and height
watermark.Width = 500;
watermark.Height = 100;
// Image will be directed from the bottom-left to the top-right corner.
watermark.Rotation = -40;
// Image will be placed center of page
watermark.RelativeHorizontalPosition = RelativeHorizontalPosition.Page;
watermark.RelativeVerticalPosition = RelativeVerticalPosition.Page;
watermark.WrapType = WrapType.None;
watermark.VerticalAlignment = VerticalAlignment.Top;
watermark.HorizontalAlignment = HorizontalAlignment.Left;
watermark.BehindText = false;
builder.InsertNode(watermark);
builder.Document.Save(MyDir + "test Out.docx");

It is a good sample for my needs, but I have some residual questions:

  1. How can I set a margin? For example, from the top of the page in the above example?
  2. How can I put the watermark on a desired page (the code above inserts the image on first page)?
  3. Can I set the opacity for the image?

Regards!

2

Hi Alessandro,

Thanks for your inquiry. Please refer to the complete article below which outlines how to Add a Watermark to a Document:
https://docs.aspose.com/words/net/working-with-watermark/

Secondly, you can use standard .NET classes to be able to change opacity of inserted Shape (see Shape.ImageData Property). Please see following article for an example:
https://www.codeproject.com/tips/201129/change-opacity-of-image-in-c

Best regards,

3

Thank you.
I’ve already seen your article
https://docs.aspose.com/words/net/working-with-watermark/
but I haven’t found a way to set the margin for the inserted image…

(OK for the opacity, thank you.)

4

Hi Alessandro,

Thanks for your inquiry. You can use Shape.Left and Shape.Top properties to set the position of the left edge/top edge of the containing block of the shape. If you want to set left/top/right/bottom margins of page, please use PageSetup.LeftMargin, PageSetup.TopMargin, PageSetup.RightMargin and PageSetup.BottomMargin properties. I hope, this helps.

Best regards,

5

Hi Awais, Thank you…
I’ve tried to use Shaper.Left and Top but without effect…

This is my complete code (VB) and the output file is attached:

Dim doc As New Document(MyDir & "WatermarkSampleDoc.docx")
Dim builder As New DocumentBuilder(doc)
Dim watermark As New Shape(doc, ShapeType.Image)
watermark.ImageData.SetImage(MyDir & "Barcode.tif")

' setting image width and height
watermark.Width = 300
watermark.Height = 100
' setting left and top of the shape
watermark.Left = 100
watermark.Left = 20
' Image will be placed center of page
watermark.RelativeHorizontalPosition = RelativeHorizontalPosition.Page
watermark.RelativeVerticalPosition = RelativeVerticalPosition.Page
watermark.WrapType = WrapType.None
watermark.VerticalAlignment = VerticalAlignment.Top
watermark.HorizontalAlignment = HorizontalAlignment.Left
watermark.BehindText = False
builder.InsertNode(watermark)
builder.Document.Save(MyDir & "Output.docx")
6

Hi Alessandro,

Thanks for the additional information. You can work this around by simply commenting the following two lines of code:

'watermark.VerticalAlignment = VerticalAlignment.Top
'watermark.HorizontalAlignment = Aspose.Words.Drawing.HorizontalAlignment.Left

I hope, this helps.

Best regards,

7

Thank you very much!
It works correctly!

But, the last of my needs: can I put the watermark in a specified page?
The above code puts the watermark into the first page

Thank you in advance!

8

Hi Alessandro,

Thanks for your inquiry. Sure, you can achieve this using Aspose.Words. First you need to find out a Paragraph on that particular page using the classes available in Aspose.Words.Layout Namespace and then anchor the watermark shape to that Paragraph. I hope, this helps.

Best regards,

9

Thank you again.
Regards