RPA Robotic Process Automation – Regular Expression Search In PDF And Highlight On Rendered Page – C#

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RPA Robotic Process Automation – Regular Expression Search In PDF And Highlight On Rendered Page – C#

printable version:
ByteScout-Robotic-Process-Automation-C-sharp-C-sharp.pdf

How to regular expression search in PDF and highlight on rendered page in C# with ByteScout Robotic Process Automation

ByteScout Robotic Process Automation is components and tools for quick RPA (Robotic Process Automation) implementation.

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Program.cs

      using System.Diagnostics;
using System.Drawing;
using Bytescout.PDFExtractor;
using Bytescout.PDFRenderer;

namespace SearchAndHighlightExample
{
	class Program
	{
		static void Main(string[] args)
		{
			const string inputFile = @"sample.pdf";
			const int pageIndex = 0;
			const float renderingResolution = 300f;
			const string searchPattern = "\\d+\\.\\d+";

			// Prepare TextExtractor
			using (TextExtractor textExtractor = new TextExtractor("demo", "demo"))
			{
				textExtractor.RegexSearch = true;
				textExtractor.LoadDocumentFromFile(inputFile);

				// Preapre RasterRenderer
				using (RasterRenderer rasterRenderer = new RasterRenderer("demo", "demo"))
				{
					rasterRenderer.LoadDocumentFromFile(inputFile);

					// Render document page to image
					Image image = rasterRenderer.GetImage(pageIndex, renderingResolution);

					// Prepare highlight brush
					Brush highlightBrush = new SolidBrush(Color.FromArgb(128, Color.Yellow));

					using (Graphics graphics = Graphics.FromImage(image))
					{
						// Search for pattern and paint found piecese
						if (textExtractor.Find(pageIndex, searchPattern, caseSensitive: false))
						{
							do
							{
								foreach (var foundPiece in textExtractor.FoundText.Elements)
								{
									// Convert from document Points to pixels
									Rectangle pixelRect = new Rectangle(
										(int) (foundPiece.Bounds.Left / 72f * renderingResolution),
										(int) (foundPiece.Bounds.Top / 72f * renderingResolution),
										(int) (foundPiece.Bounds.Width / 72f * renderingResolution),
										(int) (foundPiece.Bounds.Height / 72f * renderingResolution)
									);

									// Paint rectangle
									graphics.FillRectangle(highlightBrush, pixelRect);
								}
							} while (textExtractor.FindNext());
						}
					}

					image.Save("result.png");
					Process.Start("result.png");
				}
			}
		}
	}
}

SearchAndHighlightExample.csproj

      <?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="12.0" DefaultTargets="Build" 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>{8378FE44-D33E-4759-AF78-8BAF35E80587}</ProjectGuid>
    <OutputType>Exe</OutputType>
    <AppDesignerFolder>Properties</AppDesignerFolder>
    <RootNamespace>SearchAndHighlightExample</RootNamespace>
    <AssemblyName>SearchAndHighlightExample</AssemblyName>
    <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
    <FileAlignment>512</FileAlignment>
  </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.PDFExtractor, Version=8.5.0.2863, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL">
      <SpecificVersion>False</SpecificVersion>
      <HintPath>..\..\Program Files\Bytescout PDF Extractor SDK\net4.00\Bytescout.PDFExtractor.dll</HintPath>
    </Reference>
    <Reference Include="Bytescout.PDFRenderer, Version=8.5.0.2860, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL">
      <SpecificVersion>False</SpecificVersion>
      <HintPath>..\..\Program Files\Bytescout PDF Renderer SDK\net4.00\Bytescout.PDFRenderer.dll</HintPath>
    </Reference>
    <Reference Include="System" />
    <Reference Include="System.Core" />
    <Reference Include="System.Drawing" />
    <Reference Include="System.Xml.Linq" />
    <Reference Include="System.Data.DataSetExtensions" />
    <Reference Include="System.Data" />
    <Reference Include="System.Xml" />
  </ItemGroup>
  <ItemGroup>
    <Compile Include="Program.cs" />
    <Compile Include="Properties\AssemblyInfo.cs" />
  </ItemGroup>
  <ItemGroup>
    <Content Include="sample.pdf">
      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
    </Content>
  </ItemGroup>
  <Import Project="$(MSBuildToolsPath)\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>

SearchAndHighlightExample.sln

      
Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio 2013
VisualStudioVersion = 12.0.40629.0
MinimumVisualStudioVersion = 10.0.40219.1
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SearchAndHighlightExample", "SearchAndHighlightExample.csproj", "{8378FE44-D33E-4759-AF78-8BAF35E80587}"
EndProject
Global
	GlobalSection(SolutionConfigurationPlatforms) = preSolution
		Debug|Any CPU = Debug|Any CPU
		Release|Any CPU = Release|Any CPU
	EndGlobalSection
	GlobalSection(ProjectConfigurationPlatforms) = postSolution
		{8378FE44-D33E-4759-AF78-8BAF35E80587}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
		{8378FE44-D33E-4759-AF78-8BAF35E80587}.Debug|Any CPU.Build.0 = Debug|Any CPU
		{8378FE44-D33E-4759-AF78-8BAF35E80587}.Release|Any CPU.ActiveCfg = Release|Any CPU
		{8378FE44-D33E-4759-AF78-8BAF35E80587}.Release|Any CPU.Build.0 = Release|Any CPU
	EndGlobalSection
	GlobalSection(SolutionProperties) = preSolution
		HideSolutionNode = FALSE
	EndGlobalSection
EndGlobal