hide images in PDF document in C# using ByteScout Robotic Process Automation

ByteScout Robotic Process Automation: set of tools for rapid implementation of robotic process automation applications.

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HideImagesInPdfDocument.csproj

      
<?xml version="1.0" encoding="utf-8"?> <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" /> <PropertyGroup> <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> <ProjectGuid>{AF6915BA-85D2-43E3-AD28-2743B7E805B1}</ProjectGuid> <OutputType>Exe</OutputType> <RootNamespace>HideImagesInPdfDocument</RootNamespace> <AssemblyName>HideImagesInPdfDocument</AssemblyName> <TargetFrameworkVersion>v4.0</TargetFrameworkVersion> <FileAlignment>512</FileAlignment> <Deterministic>true</Deterministic> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> <PlatformTarget>AnyCPU</PlatformTarget> <DebugSymbols>true</DebugSymbols> <DebugType>full</DebugType> <Optimize>false</Optimize> <OutputPath>bin\Debug\</OutputPath> <DefineConstants>DEBUG;TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' "> <PlatformTarget>AnyCPU</PlatformTarget> <DebugType>pdbonly</DebugType> <Optimize>true</Optimize> <OutputPath>bin\Release\</OutputPath> <DefineConstants>TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <ItemGroup> <Reference Include="Bytescout.PDF, Version=1.9.1.301, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL" /> <Reference Include="Bytescout.PDFExtractor, Version=10.0.0.3429, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL" /> <Reference Include="System" /> <Reference Include="System.Core" /> <Reference Include="System.Drawing" /> <Reference Include="System.Xml.Linq" /> <Reference Include="System.Data.DataSetExtensions" /> <Reference Include="Microsoft.CSharp" /> <Reference Include="System.Data" /> <Reference Include="System.Xml" /> </ItemGroup> <ItemGroup> <Compile Include="Program.cs" /> </ItemGroup> <ItemGroup> <Content Include="mask.png"> <CopyToOutputDirectory>Always</CopyToOutputDirectory> </Content> </ItemGroup> <ItemGroup> <None Include="sample.pdf"> <CopyToOutputDirectory>Always</CopyToOutputDirectory> </None> </ItemGroup> <ItemGroup> <Folder Include="Properties\" /> </ItemGroup> <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" /> </Project>

HideImagesInPdfDocument.sln

      
Microsoft Visual Studio Solution File, Format Version 12.00 # Visual Studio Version 16 VisualStudioVersion = 16.0.28729.10 MinimumVisualStudioVersion = 10.0.40219.1 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "HideImagesInPdfDocument", "HideImagesInPdfDocument.csproj", "{AF6915BA-85D2-43E3-AD28-2743B7E805B1}" EndProject Global GlobalSection(SolutionConfigurationPlatforms) = preSolution Debug|Any CPU = Debug|Any CPU Release|Any CPU = Release|Any CPU EndGlobalSection GlobalSection(ProjectConfigurationPlatforms) = postSolution {AF6915BA-85D2-43E3-AD28-2743B7E805B1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU {AF6915BA-85D2-43E3-AD28-2743B7E805B1}.Debug|Any CPU.Build.0 = Debug|Any CPU {AF6915BA-85D2-43E3-AD28-2743B7E805B1}.Release|Any CPU.ActiveCfg = Release|Any CPU {AF6915BA-85D2-43E3-AD28-2743B7E805B1}.Release|Any CPU.Build.0 = Release|Any CPU EndGlobalSection GlobalSection(SolutionProperties) = preSolution HideSolutionNode = FALSE EndGlobalSection GlobalSection(ExtensibilityGlobals) = postSolution SolutionGuid = {3BF0F1FD-BA8E-45F6-ABB2-F7EB20F38CEF} EndGlobalSection EndGlobal

Program.cs

      
using System.Diagnostics; using System.Drawing; using Bytescout.PDF; using Bytescout.PDFExtractor; using Image = Bytescout.PDF.Image; namespace ConsoleApp1 { class Program { static void Main(string[] args) { string inputPdfDocument = @".\sample.pdf"; string maskingImage = @".\mask.png"; string resultPdfDocument = @".\result.pdf"; // Create Bytescout.PDFExtractor.ImageExtractor instance using (ImageExtractor imageExtractor = new ImageExtractor()) { imageExtractor.RegistrationName = "demo"; imageExtractor.RegistrationKey = "demo"; // Load document imageExtractor.LoadDocumentFromFile(inputPdfDocument); // Create Bytescout.PDF.Document instance using (Document pdfDocument = new Document()) { pdfDocument.RegistrationName = "demo"; pdfDocument.RegistrationKey = "demo"; // Load document pdfDocument.Load(inputPdfDocument); // Load masking image var maskImage = new Image(maskingImage); // Process pages for (int i = 0; i < pdfDocument.Pages.Count; i++) { Page page = pdfDocument.Pages[i]; // Find images on the page if (imageExtractor.GetFirstPageImage(i)) { do { // Get image rectangle var imageRect = imageExtractor.GetCurrentImageRectangle(); // Draw new image other the found image page.Canvas.DrawImage(maskImage, imageRect.Left, imageRect.Top, imageRect.Width, imageRect.Height); } while (imageExtractor.GetNextImage()); } } // Save modified document pdfDocument.Save(resultPdfDocument); } } // Open document in default PDF viewer application (for demonstration). Process.Start(resultPdfDocument); } } }

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