Strike Out Words

Aspose.PDF for .NET is a PDF document manipulation and processing library that provides various features to create, modify, and convert PDF files. One of the useful features that Aspose.PDF provides is the ability to strike out words or phrases in a PDF document using C# source code. In this article, we will provide a step-by-step guide on how to strike out words using Aspose.PDF for .NET.

Step 1: Loading the PDF document

The first step is to load the PDF document that you want to modify. In this tutorial, we will load a PDF document named “input.pdf” from the “YOUR DOCUMENT DIRECTORY” folder.

string dataDir = "YOUR DOCUMENT DIRECTORY";
Document document = new Document(dataDir + "input.pdf");

Step 2: Searching for text fragments

To strike out specific words or phrases in the PDF document, you first need to search for them. Aspose.PDF provides a TextFragmentAbsorber class that can be used to search for a specific text fragment in the PDF document.

Aspose.Pdf.Text.TextFragmentAbsorber textFragmentAbsorber = new Aspose.Pdf.Text.TextFragmentAbsorber("Estoque");

In the above code, we are searching for the text fragment “Estoque” in the PDF document. You can modify this to search for any other word or phrase that you want to strike out.

Step 3: Striking out the text fragments

After finding the text fragments, the next step is to strike them out. Aspose.PDF provides a StrikeOutAnnotation class that can be used to create a strike-out annotation for the text fragment.

Aspose.Pdf.Rectangle rect = new Aspose.Pdf.Rectangle((float)textFragment.Position.XIndent, (float)textFragment.Position.YIndent, (float)textFragment.Position.XIndent + (float)textFragment.Rectangle.Width, (float)textFragment.Position.YIndent + (float)textFragment.Rectangle.Height);

StrikeOutAnnotation strikeOut = new StrikeOutAnnotation(textFragment.Page, rect);
strikeOut.Opacity = .80f;
strikeOut.Border = new Border(strikeOut);
strikeOut.Color = Aspose.Pdf.Color.Red;
textFragment.Page.Annotations.Add(strikeOut);

In the above code, we are creating a strike-out annotation for each text fragment that we found. We are setting the opacity, border, and color of the strike-out annotation as well.

Step 4: Saving the modified PDF document

After striking out the text fragments, the save the modified document.

dataDir = dataDir + "StrikeOutWords_out.pdf";
document.Save(dataDir);

Example source code for Strike Out Words using Aspose.PDF for .NET

// The path to the documents directory.
string dataDir = "YOUR DOCUMENT DIRECTORY";

// Open document
Document document = new Document(dataDir + "input.pdf");

// Create TextFragment Absorber instance to search particular text fragment
Aspose.Pdf.Text.TextFragmentAbsorber textFragmentAbsorber = new Aspose.Pdf.Text.TextFragmentAbsorber("Estoque");
// Iterate through pages of PDF document
for (int i = 1; i <= document.Pages.Count; i++)
{
	// Get first page of PDF document
	Page page = document.Pages[1];
	page.Accept(textFragmentAbsorber);
}

// Create a collection of Absorbed text
Aspose.Pdf.Text.TextFragmentCollection textFragmentCollection = textFragmentAbsorber.TextFragments;

// Iterate on above collection
for (int j = 1; j <= textFragmentCollection.Count; j++)
{
	Aspose.Pdf.Text.TextFragment textFragment = textFragmentCollection[j];

	// Get rectangular dimensions of TextFragment object  	
	Aspose.Pdf.Rectangle rect = new Aspose.Pdf.Rectangle(
				(float)textFragment.Position.XIndent,
				(float)textFragment.Position.YIndent,
				(float)textFragment.Position.XIndent +
				(float)textFragment.Rectangle.Width,
				(float)textFragment.Position.YIndent +
				(float)textFragment.Rectangle.Height);

	// Instantiate StrikeOut Annotation instance
	StrikeOutAnnotation strikeOut = new StrikeOutAnnotation(textFragment.Page, rect);
	// Set opacity for annotation
	strikeOut.Opacity = .80f;
	// Set the border for annotation instance
	strikeOut.Border = new Border(strikeOut);
	// Set the color of annotation
	strikeOut.Color = Aspose.Pdf.Color.Red;
	// Add annotation to annotations collection of TextFragment
	textFragment.Page.Annotations.Add(strikeOut);
}
dataDir = dataDir + "StrikeOutWords_out.pdf";
document.Save(dataDir);

Conclusion

In this tutorial, we learned how to use Aspose.PDF for .NET to strike out specific words in a PDF document. By following the step-by-step guide and using the provided C# source code, you can easily load a PDF document, search for specific text fragments, and create strike-out annotations to visually mark and strike out those words. Aspose.PDF for .NET provides a simple and effective way to manipulate PDF documents programmatically, making it a valuable tool for developers working with PDF files in .NET applications.

FAQ’s

Q: What is Aspose.PDF for .NET?

A: Aspose.PDF for .NET is a powerful library that allows developers to create, edit, and manipulate PDF documents programmatically in .NET applications. It provides a wide range of features to work with PDF files, including text extraction, annotation handling, form filling, and much more.

Q: Can I use Aspose.PDF for .NET to strike out specific words in a PDF document?

A: Yes, Aspose.PDF for .NET provides functionality to search for specific text fragments in a PDF document and then create strike-out annotations to visually mark and strike out those words.

Q: How do I specify the text I want to strike out in the PDF document?

A: To specify the text you want to strike out, you can use the TextFragmentAbsorber class provided by Aspose.PDF for .NET. It allows you to search for a specific text fragment in the PDF document based on your desired criteria.

Q: Can I customize the appearance of the strike-out annotation?

A: Yes, you can customize various properties of the strike-out annotation, such as the opacity, border style, and color. This allows you to tailor the appearance of the strike-out annotation to your specific requirements.