Find and Replace Text in PDF C#

find-replace-text-pdf-page.cs

// Open document
Document pdfDocument = new Document("Document.pdf");

// Create TextAbsorber object to find all instances of the input search phrase
TextFragmentAbsorber textFragmentAbsorber = new TextFragmentAbsorber("text");

// Accept the absorber for desired
pdfDocument.Pages[1].Accept(textFragmentAbsorber);

// Get the extracted text fragments
TextFragmentCollection textFragmentCollection = textFragmentAbsorber.TextFragments;

// Loop through the fragments
foreach (TextFragment textFragment in textFragmentCollection)
{
    // Update text and other properties
    textFragment.Text = "TEXT";
    textFragment.TextState.Font = FontRepository.FindFont("Verdana");
    textFragment.TextState.FontSize = 22;
    textFragment.TextState.ForegroundColor = Aspose.Pdf.Color.FromRgb(System.Drawing.Color.Blue);
    textFragment.TextState.BackgroundColor = Aspose.Pdf.Color.FromRgb(System.Drawing.Color.Green);
}

// Save resulting PDF document.
pdfDocument.Save("updated-document.pdf");

find-replace-text-pdf-regex.cs

// Open document
Document pdfDocument = new Document("Document.pdf");

// Create TextAbsorber object to find all the phrases matching the regular expression
TextFragmentAbsorber textFragmentAbsorber = new TextFragmentAbsorber("\\d{4}-\\d{4}"); // Like 1999-2000

// Set text search option to specify regular expression usage
TextSearchOptions textSearchOptions = new TextSearchOptions(true);
textFragmentAbsorber.TextSearchOptions = textSearchOptions;

// Accept the absorber for a single page
pdfDocument.Pages[1].Accept(textFragmentAbsorber);

// Get the extracted text fragments
TextFragmentCollection textFragmentCollection = textFragmentAbsorber.TextFragments;

// Loop through the fragments
foreach (TextFragment textFragment in textFragmentCollection)
{
    // Update text and other properties
    textFragment.Text = "New Phrase";
    // Set to an instance of an object.
    textFragment.TextState.Font = FontRepository.FindFont("Verdana");
    textFragment.TextState.FontSize = 22;
    textFragment.TextState.ForegroundColor = Aspose.Pdf.Color.FromRgb(System.Drawing.Color.Blue);
    textFragment.TextState.BackgroundColor = Aspose.Pdf.Color.FromRgb(System.Drawing.Color.Green);
}

// Save PDF
pdfDocument.Save("output.pdf");

find-replace-text-pdf-region.cs

// load PDF file
Document pdf = new Document("Document.pdf");

// instantiate TextFragment Absorber object
TextFragmentAbsorber TextFragmentAbsorberAddress = new TextFragmentAbsorber();

// search text within page bound
TextFragmentAbsorberAddress.TextSearchOptions.LimitToPageBounds = true;

// specify the page region for TextSearch Options
TextFragmentAbsorberAddress.TextSearchOptions.Rectangle = new Rectangle(100, 100, 200, 200);

// search text from first page of PDF file
pdf.Pages[1].Accept(TextFragmentAbsorberAddress);

// iterate through individual TextFragment
foreach (TextFragment tf in TextFragmentAbsorberAddress.TextFragments)
{
    // update text to blank characters
    tf.Text = "";
}

// save updated PDF file after text replace
pdf.Save("output.pdf");

find-replace-text-pdf.cs

// Open document
Document pdfDocument = new Document("Document.pdf");

// Create TextAbsorber object to find all instances of the input search phrase
TextFragmentAbsorber textFragmentAbsorber = new TextFragmentAbsorber("text");

// Accept the absorber for all the pages
pdfDocument.Pages.Accept(textFragmentAbsorber);

// Get the extracted text fragments
TextFragmentCollection textFragmentCollection = textFragmentAbsorber.TextFragments;

// Loop through the fragments
foreach (TextFragment textFragment in textFragmentCollection)
{
    // Update text and other properties
    textFragment.Text = "TEXT";
    textFragment.TextState.Font = FontRepository.FindFont("Verdana");
    textFragment.TextState.FontSize = 22;
    textFragment.TextState.ForegroundColor = Aspose.Pdf.Color.FromRgb(System.Drawing.Color.Blue);
    textFragment.TextState.BackgroundColor = Aspose.Pdf.Color.FromRgb(System.Drawing.Color.Green);
}
            
// Save resulting PDF document.
pdfDocument.Save("updated-document.pdf");