DEV Community

Atir Tahir
Atir Tahir

Posted on

3

Add watermark to the converted document in C# or Java

Document conversion is one of the most frequent process that endures across a lot of industries. Sometimes, its the business need to put a watermark on the resultant document. For example, you want to convert a PPTX to PDF with a watermark text or image on all the PDF pages.

GroupDocs.Conversion for .NET gives you such a option. It possesses a class WatermarkOptions with rich properties such as:

  • Text/Font
  • Color
  • Width
  • Height
  • Background
  • Transparency
  • Rotation angle

Lets have a look at its implementation in C#:

using (Converter converter = new Converter("sample.docx"))
{
WatermarkOptions watermark = new WatermarkOptions
{
Text = "Sample watermark",
Color = Color.Red,
Width = 100,
Height = 100,
Background = true
};
PdfConvertOptions options = new PdfConvertOptions
{
Watermark = watermark
};
converter.Convert("converted.pdf", options);
}

Document conversion in Java:

ConversionConfig conversionConfig = new ConversionConfig();
conversionConfig.setStoragePath("source file path");
conversionConfig.setOutputPath("output path");
ConversionHandler conversionHandler = new ConversionHandler(conversionConfig);
String sourceFileName = "source.pptx";
PdfSaveOptions saveOptions = new PdfSaveOptions();
WatermarkOptions watermarkOptions = new WatermarkOptions();
watermarkOptions.setText("Watermark text");
watermarkOptions.setColor(Color.blue);
watermarkOptions.setFont(new Font("Arial", 40, 12));
watermarkOptions.setRotationAngle(45);
watermarkOptions.setTransparency(0.1);
watermarkOptions.setLeft(200);
watermarkOptions.setTop(400);
saveOptions.getWatermarkOptions().setBackground(true);
saveOptions.setWatermarkOptions(watermarkOptions);
ConvertedDocument result = conversionHandler.<String> convert(sourceFileName, saveOptions);
result.save(sourceFileName + "." + result.getFileType());

Below is the screenshot, you can see conversion of a PPTX to PDF along with watermark text.

Alt Text

Go through the API features. If there’s any issue, you can post on forum.

Image of Datadog

The Essential Toolkit for Front-end Developers

Take a user-centric approach to front-end monitoring that evolves alongside increasingly complex frameworks and single-page applications.

Get The Kit

Top comments (0)

A Workflow Copilot. Tailored to You.

Pieces.app image

Our desktop app, with its intelligent copilot, streamlines coding by generating snippets, extracting code from screenshots, and accelerating problem-solving.

Read the docs

👋 Kindness is contagious

Please leave a ❤️ or a friendly comment on this post if you found it helpful!

Okay