ByteScout PDF Extractor SDK – C# – Find Text in PDF using Regex

Home
/
Articles
/
ByteScout PDF Extractor SDK – C# – Find Text in PDF using Regex

printable version:
ByteScout-PDF-Extractor-SDK-C-sharp-Find-Text-in-PDF-using-Regex.pdf

How to find text in PDF using regex in C# using ByteScout PDF Extractor SDK

Write code in C# to find text in PDF using regex with this step-by-step tutorial

These source code samples are listed and grouped by their programming language and functions they use. ByteScout PDF Extractor SDK is the SDK that helps developers to extract data from unstructured documents, pdf, images, scanned and electronic forms. Includes AI functions like automatic table detection, automatic table extraction and restructuring, text recognition and text restoration from pdf and scanned documents. Includes PDF to CSV, PDF to XML, PDF to JSON, PDF to searchable PDF functions as well as methods for low level data extraction. It can find text in PDF using regex in C#.

You will save a lot of time on writing and testing code as you may just take the C# code from ByteScout PDF Extractor SDK for find text in PDF using regex below and use it in your application. In order to implement the functionality, you should copy and paste this code for C# below into your code editor with your app, compile and run your application. Further enhancement of the code will make it more vigorous.

Download free trial version of ByteScout PDF Extractor SDK from our website with this and other source code samples for C#.

On-demand (REST Web API) version:
Web API (on-demand version)

On-premise offline SDK for Windows:
60 Day Free Trial (on-premise)

Program.cs

      using System;
using Bytescout.PDFExtractor;

namespace FindText
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create Bytescout.PDFExtractor.TextExtractor instance
            TextExtractor extractor = new TextExtractor();
            extractor.RegistrationName = "demo";
            extractor.RegistrationKey = "demo";

            // Load sample PDF document
            extractor.LoadDocumentFromFile(@".\Invoice.pdf");

            extractor.RegexSearch = true; // Enable the regular expressions
            
            int pageCount = extractor.GetPageCount();

            // Search through pages
            for (int i = 0; i < pageCount; i++)
            {
                // Search dates in format 12/31/1999
                string regexPattern = "[0-9]{2}/[0-9]{2}/[0-9]{4}";
                // See the complete regular expressions reference at https://msdn.microsoft.com/en-us/library/az24scfc(v=vs.110).aspx

                // Search each page for the pattern
                if (extractor.Find(i, regexPattern, false))
                {
                    do
                    {
                        Console.WriteLine("");
                        Console.WriteLine("Found on page " + i + " at location " + extractor.FoundText.Bounds);
                        Console.WriteLine("");

                        // Iterate through each element in the found text
                        foreach (ISearchResultElement element in extractor.FoundText.Elements)
                        {
                            Console.WriteLine("   Text: " + element.Text);
                            Console.WriteLine("   Font is bold: " + element.FontIsBold);
                            Console.WriteLine("   Font is italic: " + element.FontIsItalic);
                            Console.WriteLine("   Font name: " + element.FontName);
                            Console.WriteLine("   Font size: " + element.FontSize);
                            Console.WriteLine("   Font color: " + element.FontColor);
                            Console.WriteLine();
                        }
                    }
                    while (extractor.FindNext());
                }
            }

            // Cleanup
			extractor.Dispose();

            Console.WriteLine();
            Console.WriteLine("Press any key to continue...");
            Console.ReadLine();
        }
    }
}