Add Watermark to XLS/DOCX/PPT while converting them to PDF using Aspose APIs

[rajum]

We want to convert Word,Excel,PPT, CAD Files to be converted to PDF.
We tried to use below code as provided in the documentation for converting to pdf.

We want to add watermark to the output pdf file.

1. How to add watermark to the file being converted?
2. How to handle if the Input File already has a watermark

Document:

Document doc=new Document(inputFileName);
doc.save(outputFileName);

Excel

Workbook workbook = new Workbook(inputFileName);
workbook.save(outputFileName);

PPT

Presentation presentation = new Presentation(inputFileName);
presentation.save(outputFileName, SaveFormat.Pdf);

CAD Files

Image image = Image.load(inputFileName);
CadRasterizationOptions rasterizationOptions = new CadRasterizationOptions();
rasterizationOptions.setPageSize(new SizeF(1200, 1200));
PdfOptions pdfOptions = new PdfOptions();
pdfOptions.setVectorRasterizationOptions(rasterizationOptions);
image.save(outputFileName, pdfOptions);

[amjad.sahi]

@rajum,

Thanks for the details.

Well, I think you should add watermarks to your input file formats (e.g DOC/DOCX, XLS/XLSX, PPT, etc.) via Aspose APIs, so when you convert to PDF, the watermarks would be retained. For example, see the document on how to add watermark to the Word document. Similarly using Aspose.Cells API, you may add watermark to the worksheet. Moreover, see the thread on how to add watermark to Powerpoint presentation using Aspose.Slides APIs:

Power point slide un-editable

@farooq.ahmad, I have observed your requirements and like to share that you can use shape locks to protect the shapes. I suggest you to please visit this documentation article for your convenience. public static void AddWatermarkShape() { Presentation pres = new Presentation(); IMasterSlide master = pres.Masters[0]; IAutoShape ashp = master.Shapes.AddAutoShape(ShapeType.Rectangle, 10, 10, 300, 300); ashp.AddTextFrame("This is watermakr"); ashp.TextFrame.Paragraphs[0].Portio…

Also, see the thread with example on how to add watermark to CAD files:

Image file extensions which support watermark

Hi Louis, In the meantime, you can use the following code as a workaround. // … loading image here … // add new MTEXT CadMText watermark = new CadMText(); watermark.Text = “Watermark message”; watermark.InitialTextHeight = 40; watermark.InsertionPoint = new Cad3DPoint(300, 40); watermark.LayerName = “0”; cadImage.BlockEntities["*Model_Space"].AddEntity(watermark); // or add more simple entity like Text CadText text = new CadText(); text.DefaultValue = “Watermark text”; text.TextHei…

Hope, this helps a bit.