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chinnumuniyappanchinnumuniyappan
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Merge pull request #244 from SyncfusionExamples/923107
923107: Added proper code example for replacing existing image in PDF
2 parents 5e91eb7 + f677483 commit 0b67877

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‎Redaction/Replace-existing-text-in-a-PDF/.NET Framework/Replace-existing-text-in-a-PDF.slnx‎

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<Solution>
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<Project Path="Replace-existing-text-in-a-PDF/Replace-existing-text-in-a-PDF.csproj" Id="27ffc4d8-a2ca-4a30-aba0-80a4db3a1895" />
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</Solution>

‎Redaction/Replace-existing-text-in-a-PDF/.NET Framework/Replace-existing-text-in-a-PDF/App.config‎

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<?xml version="1.0" encoding="utf-8"?>
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<configuration>
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<startup>
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<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8" />
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</startup>
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<runtime>
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<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
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<dependentAssembly>
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<assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
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<bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
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</dependentAssembly>
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<dependentAssembly>
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<assemblyIdentity name="System.Memory" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
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<bindingRedirect oldVersion="0.0.0.0-4.0.1.2" newVersion="4.0.1.2" />
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</dependentAssembly>
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</assemblyBinding>
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</runtime>
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</configuration>

‎Redaction/Replace-existing-text-in-a-PDF/.NET Framework/Replace-existing-text-in-a-PDF/Data/Input.pdf‎

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‎Redaction/Replace-existing-text-in-a-PDF/.NET Framework/Replace-existing-text-in-a-PDF/Output/gitkeep.txt‎

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‎Redaction/Replace-existing-text-in-a-PDF/.NET Framework/Replace-existing-text-in-a-PDF/Program.cs‎

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using System.Drawing;
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using Syncfusion.Pdf;
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using Syncfusion.Pdf.Graphics;
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using Syncfusion.Pdf.Parsing;
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using Syncfusion.Pdf.Redaction;
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using System.Collections.Generic;
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using System.IO;
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namespace Replace_existing_text_in_a_PDF
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{
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internal class Program
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{
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static void Main(string[] args)
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{
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// Load the PDF document
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using (PdfLoadedDocument ldoc = new PdfLoadedDocument(Path.GetFullPath(@"Data/Input.pdf")))
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{
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// Dictionary to store the found text bounds for each page
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Dictionary<int, List<RectangleF>> matchedTextbounds = new Dictionary<int, List<RectangleF>>();
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// Get the first page of the PDF
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PdfLoadedPage page = ldoc.Pages[0] as PdfLoadedPage;
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// Search for the text and get its bounding rectangles
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ldoc.FindText("Fusce", out matchedTextbounds);
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// Loop through each page with matches
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for (int i = 0; i < matchedTextbounds.Count; i++)
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{
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// Get all rectangles where the text was found on this page
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List<RectangleF> rectangles = matchedTextbounds[i];
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// Loop through each found rectangle
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for (int j = 0; j < rectangles.Count; j++)
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{
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// Create a redaction area with transparent fill over the found text
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PdfRedaction redaction = new PdfRedaction(rectangles[j], Color.Transparent);
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// Draw the replacement text on the redaction area
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redaction.Appearance.Graphics.DrawString(
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"Hello",
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new PdfStandardFont(PdfFontFamily.Helvetica, 9),
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PdfBrushes.Black,
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PointF.Empty
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);
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// Add the redaction to the page
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page.AddRedaction(redaction);
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}
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}
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// Save the PDF document
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ldoc.Save(Path.GetFullPath(@"Output/Output.pdf"));
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}
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}
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}
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}

‎Redaction/Replace-existing-text-in-a-PDF/.NET Framework/Replace-existing-text-in-a-PDF/Properties/AssemblyInfo.cs‎

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using System.Reflection;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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// General Information about an assembly is controlled through the following
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// set of attributes. Change these attribute values to modify the information
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// associated with an assembly.
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[assembly: AssemblyTitle("Replace-existing-text-in-a-PDF")]
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[assembly: AssemblyDescription("")]
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[assembly: AssemblyConfiguration("")]
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[assembly: AssemblyCompany("")]
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[assembly: AssemblyProduct("Replace-existing-text-in-a-PDF")]
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[assembly: AssemblyCopyright("Copyright © 2026")]
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[assembly: AssemblyTrademark("")]
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[assembly: AssemblyCulture("")]
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// Setting ComVisible to false makes the types in this assembly not visible
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// to COM components. If you need to access a type in this assembly from
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// COM, set the ComVisible attribute to true on that type.
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[assembly: ComVisible(false)]
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// The following GUID is for the ID of the typelib if this project is exposed to COM
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[assembly: Guid("27ffc4d8-a2ca-4a30-aba0-80a4db3a1895")]
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// Version information for an assembly consists of the following four values:
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//
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// Major Version
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// Minor Version
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// Build Number
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// Revision
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//
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[assembly: AssemblyVersion("1.0.0.0")]
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[assembly: AssemblyFileVersion("1.0.0.0")]

‎Redaction/Replace-existing-text-in-a-PDF/.NET Framework/Replace-existing-text-in-a-PDF/Replace-existing-text-in-a-PDF.csproj‎

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<?xml version="1.0" encoding="utf-8"?>
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<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
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<PropertyGroup>
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<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
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<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
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<ProjectGuid>{27FFC4D8-A2CA-4A30-ABA0-80A4DB3A1895}</ProjectGuid>
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<OutputType>Exe</OutputType>
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<RootNamespace>Replace_existing_text_in_a_PDF</RootNamespace>
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<AssemblyName>Replace-existing-text-in-a-PDF</AssemblyName>
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<TargetFrameworkVersion>v4.8</TargetFrameworkVersion>
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<FileAlignment>512</FileAlignment>
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<AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
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<Deterministic>true</Deterministic>
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<NuGetPackageImportStamp>
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</NuGetPackageImportStamp>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
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<PlatformTarget>AnyCPU</PlatformTarget>
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<DebugSymbols>true</DebugSymbols>
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<DebugType>full</DebugType>
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<Optimize>false</Optimize>
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<OutputPath>bin\Debug\</OutputPath>
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<DefineConstants>DEBUG;TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
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<PlatformTarget>AnyCPU</PlatformTarget>
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<DebugType>pdbonly</DebugType>
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<Optimize>true</Optimize>
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<OutputPath>bin\Release\</OutputPath>
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<DefineConstants>TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<ItemGroup>
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<Reference Include="Syncfusion.Compression.Base, Version=32.2462.5.0, Culture=neutral, PublicKeyToken=3d67ed1f87d44c89, processorArchitecture=MSIL">
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<HintPath>..\packages\Syncfusion.Compression.Base.32.2.5\lib\net462\Syncfusion.Compression.Base.dll</HintPath>
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</Reference>
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<Reference Include="Syncfusion.Licensing, Version=32.2462.5.0, Culture=neutral, PublicKeyToken=632609b4d040f6b4, processorArchitecture=MSIL">
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<HintPath>..\packages\Syncfusion.Licensing.32.2.5\lib\net462\Syncfusion.Licensing.dll</HintPath>
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</Reference>
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<Reference Include="Syncfusion.Pdf.Base, Version=32.2462.5.0, Culture=neutral, PublicKeyToken=3d67ed1f87d44c89, processorArchitecture=MSIL">
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<HintPath>..\packages\Syncfusion.Pdf.WinForms.32.2.5\lib\net462\Syncfusion.Pdf.Base.dll</HintPath>
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</Reference>
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<Reference Include="System" />
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<Reference Include="System.Core" />
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<Reference Include="System.Drawing" />
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<Reference Include="System.Numerics" />
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<Reference Include="System.Xml.Linq" />
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<Reference Include="System.Data.DataSetExtensions" />
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<Reference Include="Microsoft.CSharp" />
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<Reference Include="System.Data" />
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<Reference Include="System.Net.Http" />
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<Reference Include="System.Xml" />
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</ItemGroup>
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<ItemGroup>
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<Compile Include="Program.cs" />
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<Compile Include="Properties\AssemblyInfo.cs" />
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</ItemGroup>
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<ItemGroup>
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<None Include="App.config" />
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<None Include="packages.config" />
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</ItemGroup>
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<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
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</Project>

‎Redaction/Replace-existing-text-in-a-PDF/.NET Framework/Replace-existing-text-in-a-PDF/packages.config‎

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<?xml version="1.0" encoding="utf-8"?>
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<packages>
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<package id="Syncfusion.Compression.Base" version="32.2.9" targetFramework="net48" />
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<package id="Syncfusion.Licensing" version="32.2.9" targetFramework="net48" />
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<package id="Syncfusion.Pdf.WinForms" version="32.2.9" targetFramework="net48" />
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</packages>

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