Text Positional Analysis in .NET

text-positional-analysis-dotnet.cs

using UglyToad.PdfPig;
using UglyToad.PdfPig.Content;

class TableExtractor
{
    public void AnalyzeDocument(string filePath)
    {
        using var document = PdfDocument.Open(filePath);
        
        foreach (var page in document.GetPages())
        {
            // Group letters into words and lines
            var letters = page.Letters;
            var words = page.GetWords();
            
            // Detect potential tables by aligned words
            var columnGroups = words.GroupBy(w => w.BoundingBox.Left)
                                   .Where(g => g.Count() > 3);
            
            foreach (var column in columnGroups)
            {
                Console.WriteLine($"Found column at X={column.Key}:");
                foreach (var word in column.OrderBy(w => w.BoundingBox.Top))
                {
                    Console.WriteLine($"  {word.Text}");
                }
            }
        }
    }
}