ByteScout PDF Extractor SDK – C# – Make Unsearchable PDF

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How to make unsearchable PDF in C# using ByteScout PDF Extractor SDK

Tutorial on how to make unsearchable PDF in C#

Source code documentation samples provide quick and easy way to add a required functionality into your application. ByteScout PDF Extractor SDK can make unsearchable PDF. It can be used from C#. ByteScout PDF Extractor SDK is the Software Development Kit (SDK) that is designed to help developers with data extraction from unstructured documents like pdf, tiff, scans, images, scanned and electronic forms. The library is powered by OCR, computer vision and AI to provide unique functionality like table detection, automatic table structure extraction, data restoration, data restructuring and reconstruction. Supports PDF, TIFF, PNG, JPG images as input and can output CSV, XML, JSON formatted data. Includes full set of utilities like pdf splitter, pdf merger, searchable pdf maker.

This rich sample source code in C# for ByteScout PDF Extractor SDK includes the number of functions and options you should do calling the API to make unsearchable PDF. Follow the instructions from the scratch to work and copy the C# code. Detailed tutorials and documentation are available along with installed ByteScout PDF Extractor SDK if you’d like to dive deeper into the topic and the details of the API.

Free trial version of ByteScout PDF Extractor SDK is available for download from our website. Get it to try other source code samples for C#.

MakeUnsearchablePDF.NETCore.csproj
      
<?xml version="1.0" encoding="utf-8"?> <Project Sdk="Microsoft.NET.Sdk"> <PropertyGroup> <OutputType>Exe</OutputType> <TargetFramework>netcoreapp2.0</TargetFramework> <EnableDefaultCompileItems>false</EnableDefaultCompileItems> <GenerateAssemblyCompanyAttribute>false</GenerateAssemblyCompanyAttribute> <GenerateAssemblyConfigurationAttribute>false</GenerateAssemblyConfigurationAttribute> <GenerateAssemblyFileVersionAttribute>false</GenerateAssemblyFileVersionAttribute> <GenerateAssemblyInformationalVersionAttribute>false</GenerateAssemblyInformationalVersionAttribute> <GenerateAssemblyProductAttribute>false</GenerateAssemblyProductAttribute> <GenerateAssemblyTitleAttribute>false</GenerateAssemblyTitleAttribute> <GenerateAssemblyVersionAttribute>false</GenerateAssemblyVersionAttribute> <GenerateAssemblyCopyrightAttribute>false</GenerateAssemblyCopyrightAttribute> <GenerateAssemblyTrademarkAttribute>false</GenerateAssemblyTrademarkAttribute> <GenerateAssemblyCultureAttribute>false</GenerateAssemblyCultureAttribute> <GenerateAssemblyDescriptionAttribute>false</GenerateAssemblyDescriptionAttribute> </PropertyGroup> <ItemGroup> <Compile Include="Program.cs" /> <Compile Include="Properties\AssemblyInfo.cs" /> <None Include="..\..\sample1.pdf" Link="sample1.pdf"> <CopyToOutputDirectory>Always</CopyToOutputDirectory> </None> </ItemGroup> <ItemGroup> <PackageReference Include="Microsoft.Windows.Compatibility" Version="2.0.0" /> </ItemGroup> <ItemGroup> <Reference Include="Bytescout.PDFExtractor"> <SpecificVersion>False</SpecificVersion> <HintPath>c:\Program Files\Bytescout PDF Extractor SDK\netcoreapp2.0\Bytescout.PDFExtractor.dll</HintPath> </Reference> <Reference Include="Bytescout.PDFExtractor.OCRExtension"> <SpecificVersion>False</SpecificVersion> <HintPath>c:\Program Files\Bytescout PDF Extractor SDK\netcoreapp2.0\Bytescout.PDFExtractor.OCRExtension.dll</HintPath> </Reference> </ItemGroup> </Project>

MakeUnsearchablePDF.VS2005.csproj
      
<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <PropertyGroup> <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> <ProductVersion>8.0.50727</ProductVersion> <SchemaVersion>2.0</SchemaVersion> <ProjectGuid>{5FD39006-92D8-4ACC-B2EB-A43ECBC67F99}</ProjectGuid> <OutputType>Exe</OutputType> <AppDesignerFolder>Properties</AppDesignerFolder> <RootNamespace>MakeUnsearchablePDF</RootNamespace> <AssemblyName>MakeUnsearchablePDF</AssemblyName> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> <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' "> <DebugType>pdbonly</DebugType> <Optimize>true</Optimize> <OutputPath>bin\Release\</OutputPath> <DefineConstants>TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <ItemGroup> <Reference Include="Bytescout.PDFExtractor, Version=6.10.0.2136, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> </Reference> <Reference Include="System" /> <Reference Include="System.Data" /> <Reference Include="System.Xml" /> </ItemGroup> <ItemGroup> </ItemGroup> <ItemGroup> <Compile Include="Program.cs" /> <Compile Include="Properties\AssemblyInfo.cs" /> </ItemGroup> <ItemGroup> <Content Include="..\..\sample1.pdf"> <Link>sample1.pdf</Link> <CopyToOutputDirectory>Always</CopyToOutputDirectory> </Content> </ItemGroup> <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" /> <!-- To modify your build process, add your task inside one of the targets below and uncomment it. Other similar extension points exist, see Microsoft.Common.targets. <Target Name="BeforeBuild"> </Target> <Target Name="AfterBuild"> </Target> --> </Project>

MakeUnsearchablePDF.VS2008.csproj
      
<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="3.5"> <PropertyGroup> <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> <ProductVersion>9.0.21022</ProductVersion> <SchemaVersion>2.0</SchemaVersion> <ProjectGuid>{5FD39006-92D8-4ACC-B2EB-A43ECBC67F99}</ProjectGuid> <OutputType>Exe</OutputType> <AppDesignerFolder>Properties</AppDesignerFolder> <RootNamespace>MakeUnsearchablePDF</RootNamespace> <AssemblyName>MakeUnsearchablePDF</AssemblyName> <FileUpgradeFlags> </FileUpgradeFlags> <OldToolsVersion>2.0</OldToolsVersion> <UpgradeBackupLocation> </UpgradeBackupLocation> <TargetFrameworkVersion>v3.5</TargetFrameworkVersion> <PublishUrl>publish\</PublishUrl> <Install>true</Install> <InstallFrom>Disk</InstallFrom> <UpdateEnabled>false</UpdateEnabled> <UpdateMode>Foreground</UpdateMode> <UpdateInterval>7</UpdateInterval> <UpdateIntervalUnits>Days</UpdateIntervalUnits> <UpdatePeriodically>false</UpdatePeriodically> <UpdateRequired>false</UpdateRequired> <MapFileExtensions>true</MapFileExtensions> <ApplicationRevision>0</ApplicationRevision> <ApplicationVersion>1.0.0.%2a</ApplicationVersion> <IsWebBootstrapper>false</IsWebBootstrapper> <UseApplicationTrust>false</UseApplicationTrust> <BootstrapperEnabled>true</BootstrapperEnabled> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> <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' "> <DebugType>pdbonly</DebugType> <Optimize>true</Optimize> <OutputPath>bin\Release\</OutputPath> <DefineConstants>TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <ItemGroup> <Reference Include="Bytescout.PDFExtractor, Version=6.10.0.2136, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> <HintPath>C:\Program Files\Bytescout PDF Extractor SDK\net3.50\Bytescout.PDFExtractor.dll</HintPath> </Reference> <Reference Include="System" /> <Reference Include="System.Core"> <RequiredTargetFramework>3.5</RequiredTargetFramework> </Reference> <Reference Include="System.Data" /> <Reference Include="System.Xml" /> </ItemGroup> <ItemGroup> </ItemGroup> <ItemGroup> <Compile Include="Program.cs" /> <Compile Include="Properties\AssemblyInfo.cs" /> </ItemGroup> <ItemGroup> <Content Include="..\..\sample1.pdf"> <Link>sample1.pdf</Link> <CopyToOutputDirectory>Always</CopyToOutputDirectory> </Content> </ItemGroup> <ItemGroup> <BootstrapperPackage Include="Microsoft.Net.Client.3.5"> <Visible>False</Visible> <ProductName>.NET Framework Client Profile</ProductName> <Install>false</Install> </BootstrapperPackage> <BootstrapperPackage Include="Microsoft.Net.Framework.2.0"> <Visible>False</Visible> <ProductName>.NET Framework 2.0 %28x86%29</ProductName> <Install>true</Install> </BootstrapperPackage> <BootstrapperPackage Include="Microsoft.Net.Framework.3.0"> <Visible>False</Visible> <ProductName>.NET Framework 3.0 %28x86%29</ProductName> <Install>false</Install> </BootstrapperPackage> <BootstrapperPackage Include="Microsoft.Net.Framework.3.5"> <Visible>False</Visible> <ProductName>.NET Framework 3.5</ProductName> <Install>false</Install> </BootstrapperPackage> <BootstrapperPackage Include="Microsoft.Net.Framework.3.5.SP1"> <Visible>False</Visible> <ProductName>.NET Framework 3.5 SP1</ProductName> <Install>false</Install> </BootstrapperPackage> </ItemGroup> <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" /> <!-- To modify your build process, add your task inside one of the targets below and uncomment it. Other similar extension points exist, see Microsoft.Common.targets. <Target Name="BeforeBuild"> </Target> <Target Name="AfterBuild"> </Target> --> </Project>

MakeUnsearchablePDF.VS2010.csproj
      
<?xml version="1.0" encoding="utf-8"?> <Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0"> <PropertyGroup> <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> <ProductVersion>9.0.30729</ProductVersion> <SchemaVersion>2.0</SchemaVersion> <ProjectGuid>{5FD39006-92D8-4ACC-B2EB-A43ECBC67F99}</ProjectGuid> <OutputType>Exe</OutputType> <AppDesignerFolder>Properties</AppDesignerFolder> <RootNamespace>MakeUnsearchablePDF</RootNamespace> <AssemblyName>MakeUnsearchablePDF</AssemblyName> <FileUpgradeFlags> </FileUpgradeFlags> <OldToolsVersion>3.5</OldToolsVersion> <UpgradeBackupLocation> </UpgradeBackupLocation> <TargetFrameworkVersion>v4.0</TargetFrameworkVersion> <IsWebBootstrapper>false</IsWebBootstrapper> <TargetFrameworkProfile /> <PublishUrl>publish\</PublishUrl> <Install>true</Install> <InstallFrom>Disk</InstallFrom> <UpdateEnabled>false</UpdateEnabled> <UpdateMode>Foreground</UpdateMode> <UpdateInterval>7</UpdateInterval> <UpdateIntervalUnits>Days</UpdateIntervalUnits> <UpdatePeriodically>false</UpdatePeriodically> <UpdateRequired>false</UpdateRequired> <MapFileExtensions>true</MapFileExtensions> <ApplicationRevision>0</ApplicationRevision> <ApplicationVersion>1.0.0.%2a</ApplicationVersion> <UseApplicationTrust>false</UseApplicationTrust> <BootstrapperEnabled>true</BootstrapperEnabled> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> <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' "> <DebugType>pdbonly</DebugType> <Optimize>true</Optimize> <OutputPath>bin\Release\</OutputPath> <DefineConstants>TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <ItemGroup> <Reference Include="Bytescout.PDFExtractor, Version=6.10.0.2136, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> <HintPath>C:\Program Files\Bytescout PDF Extractor SDK\net4.00\Bytescout.PDFExtractor.dll</HintPath> </Reference> <Reference Include="System" /> <Reference Include="System.Core"> <RequiredTargetFramework>3.5</RequiredTargetFramework> </Reference> <Reference Include="System.Data" /> <Reference Include="System.Xml" /> </ItemGroup> <ItemGroup> <Compile Include="Program.cs" /> <Compile Include="Properties\AssemblyInfo.cs" /> </ItemGroup> <ItemGroup> <Content Include="..\..\sample1.pdf"> <Link>sample1.pdf</Link> <CopyToOutputDirectory>Always</CopyToOutputDirectory> </Content> </ItemGroup> <ItemGroup> <BootstrapperPackage Include="Microsoft.Net.Client.3.5"> <Visible>False</Visible> <ProductName>.NET Framework 3.5 SP1 Client Profile</ProductName> <Install>false</Install> </BootstrapperPackage> <BootstrapperPackage Include="Microsoft.Net.Framework.2.0"> <Visible>False</Visible> <ProductName>.NET Framework 2.0 %28x86%29</ProductName> <Install>true</Install> </BootstrapperPackage> <BootstrapperPackage Include="Microsoft.Net.Framework.3.0"> <Visible>False</Visible> <ProductName>.NET Framework 3.0 %28x86%29</ProductName> <Install>false</Install> </BootstrapperPackage> <BootstrapperPackage Include="Microsoft.Net.Framework.3.5"> <Visible>False</Visible> <ProductName>.NET Framework 3.5</ProductName> <Install>false</Install> </BootstrapperPackage> <BootstrapperPackage Include="Microsoft.Net.Framework.3.5.SP1"> <Visible>False</Visible> <ProductName>.NET Framework 3.5 SP1</ProductName> <Install>false</Install> </BootstrapperPackage> </ItemGroup> <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" /> <!-- To modify your build process, add your task inside one of the targets below and uncomment it. Other similar extension points exist, see Microsoft.Common.targets. <Target Name="BeforeBuild"> </Target> <Target Name="AfterBuild"> </Target> --> </Project>

Program.cs
      
using System.Diagnostics; using Bytescout.PDFExtractor; namespace MakeUnsearchablePDF { class Program { static void Main() { // Create Bytescout.PDFExtractor.UnsearchablePDFMaker instance UnsearchablePDFMaker unsearchablePDFMaker = new UnsearchablePDFMaker(); unsearchablePDFMaker.RegistrationName = "demo"; unsearchablePDFMaker.RegistrationKey = "demo"; // Load sample PDF document unsearchablePDFMaker.LoadDocumentFromFile("sample1.pdf"); // Set PDF rendering resolution to 150 DPI. Higher value - better quality, but larger output file. unsearchablePDFMaker.RenderingResolution = 150; // Set embedded images format unsearchablePDFMaker.ImageFormat = EmbeddedImageFormat.PNG; // Process the document unsearchablePDFMaker.MakePDFUnsearchable("result.pdf"); // Cleanup unsearchablePDFMaker.Dispose(); // Open the result PDF file in default associated application ProcessStartInfo processStartInfo = new ProcessStartInfo("result.pdf"); processStartInfo.UseShellExecute = true; Process.Start(processStartInfo); } } }

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