Add Watermark to Image Artifacts in PDF

Introduction

In this tutorial, we’ll guide you through the process of adding a watermark to image artifacts in a PDF document using GroupDocs.Watermark for .NET. By following these steps, you can efficiently protect your PDF files with personalized watermarks.

Prerequisites

Before we begin, ensure you have the following prerequisites:

1. GroupDocs.Watermark for .NET: Download and install the GroupDocs.Watermark for .NET library from here.
2. Document Path: Have the path to the PDF document where you want to add the watermark.
3. Output Directory: Create a directory where the watermarked document will be saved.

Import Namespaces

using GroupDocs.Watermark.Common;
using GroupDocs.Watermark.Contents.Pdf;
using GroupDocs.Watermark.Options.Pdf;
using GroupDocs.Watermark.Watermarks;
using System.IO;
using System;

Step 1: Load the Document and Initialize Watermarker

string documentPath = "Your Document Path";
string outputDirectory = "Your Document Directory";
string outputFileName = Path.Combine(outputDirectory, Path.GetFileName(documentPath));
var loadOptions = new PdfLoadOptions();
using (Watermarker watermarker = new Watermarker(documentPath, loadOptions))
{

Step 2: Get PDF Content and Add Watermark

	PdfContent pdfContent = watermarker.GetContent<PdfContent>();
	// Initialize image or text watermark
	TextWatermark watermark = new TextWatermark("Protected image", new Font("Arial", 8));
	watermark.HorizontalAlignment = HorizontalAlignment.Center;
	watermark.VerticalAlignment = VerticalAlignment.Center;
	watermark.RotateAngle = 45;
	watermark.SizingType = SizingType.ScaleToParentDimensions;
	watermark.ScaleFactor = 1;
	foreach (PdfPage page in pdfContent.Pages)
	{
		foreach (PdfArtifact artifact in page.Artifacts)
		{
			if (artifact.Image != null)
			{
				// Add watermark to the image
				artifact.Image.Add(watermark);
			}
		}
	}

Step 3: Save the Watermarked Document

	watermarker.Save(outputFileName);
}

Conclusion

With GroupDocs.Watermark for .NET, adding watermarks to image artifacts in PDF documents becomes a seamless process. By following this tutorial, you can efficiently protect your PDF files with customized watermarks, ensuring their security and authenticity.

FAQ’s

Can I add both image and text watermarks to my PDF document?

Yes, GroupDocs.Watermark for .NET supports adding both image and text watermarks simultaneously.

Is there any limitation on the number of watermarks I can add to a document?

No, you can add multiple watermarks to a document without any limitations.

Can I customize the appearance and position of the watermark?

Absolutely, you have full control over the appearance, position, and properties of the watermark.

Does GroupDocs.Watermark for .NET support other document formats besides PDF?

Yes, it supports various document formats including Word, Excel, PowerPoint, and more.

Is there a way to remove watermarks from a document?

Yes, GroupDocs.Watermark for .NET provides methods to remove watermarks from documents if needed.