VB.NET PDF - Redact PDF Text in VB.NET

Overview

Before you distribute a PDF, you may want to examine the document for sensitive content or private information that can trace the document to you. RasterEdge XDoc.PDF SDK provides such functions to protect VB.NET users' personal information. This page will show you with VB.NET demo, by using this sample code, you can call the Redact SDK API to remove or redact sensitive text that is visible in a PDF.

Redact PDF Text using VB.NET

Add necessary references:

  RasterEdge.Imaging.Basic.dll

  RasterEdge.Imaging.Basic.Codec.dll

  RasterEdge.Imaging.Drawing.dll

  RasterEdge.Imaging.Font.dll

  RasterEdge.Imaging.Processing.dll

  RasterEdge.XDoc.Raster.dll

  RasterEdge.XDoc.Raster.Core.dll

  RasterEdge.XDoc.PDF.dll

Use corresponding namespaces;

  using RasterEdge.Imaging.Basic;

  using RasterEdge.XDoc.PDF;

This VB.NET coding example shows you how to redact PDF text content.

Dim inputFilePath As String = Program.RootPath + "\\" + "1.pdf"
Dim outputFilePath As String = Program.RootPath + "\\" + "output.pdf"

' open document
Dim doc As PDFDocument = New PDFDocument(inputFilePath)
' get the 3rd page
Dim page As PDFPage = doc.GetPage(2)
' set redact region
Dim region As RectangleF = New RectangleF(100.0F, 100.0F, 300.0F, 300.0F)

' create redaction option
Dim options As RedactionOptions = New RedactionOptions()
options.AreaFillColor = Color.Black

' process redaction
PDFTextHandler.RedactText(page, region, options)
' output file
doc.Save(outputFilePath)