Convert PDF to TXT or Text to PDF Programmatically using C# VB.NET

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You can read all details at: Convert PDF to TXT or TXT to PDF using C# VB.NET

Convert_PDF_Text_Pure.cs

// Open document
Document pdfDocument = new Document(dataDir + "MultiColumnPdf.pdf");
StringBuilder builder = new StringBuilder();
// String to hold extracted text
string extractedText = "";

foreach (Page pdfPage in pdfDocument.Pages)
{
    using (MemoryStream textStream = new MemoryStream())
    {
        // Create text device
        TextDevice textDevice = new TextDevice();

        // Set different options
        TextExtractionOptions options = new
        TextExtractionOptions(TextExtractionOptions.TextFormattingMode.Pure);
        textDevice.ExtractionOptions = options;

        // Convert the page and save text to the stream
        textDevice.Process(pdfPage, textStream);

        // Close memory stream
        textStream.Close();

        // Get text from memory stream
        extractedText = Encoding.Unicode.GetString(textStream.ToArray());
    }
    builder.Append(extractedText);
}

dataDir = dataDir + "PDF_to_TXT_Pure.txt";
// Save the text file
File.WriteAllText(dataDir, builder.ToString());

Convert_PDF_Text_Raw.cs

// Open document
Document pdfDocument = new Document(dataDir + "MultiColumnPdf.pdf");
StringBuilder builder = new StringBuilder();
// String to hold extracted text
string extractedText = "";

foreach (Page pdfPage in pdfDocument.Pages)
{
    using (MemoryStream textStream = new MemoryStream())
    {
        // Create text device
        TextDevice textDevice = new TextDevice();

        // Set different options
        TextExtractionOptions options = new
        TextExtractionOptions(TextExtractionOptions.TextFormattingMode.Raw);
        textDevice.ExtractionOptions = options;

        // Convert the page and save text to the stream
        textDevice.Process(pdfPage, textStream);

        // Close memory stream
        textStream.Close();

        // Get text from memory stream
        extractedText = Encoding.Unicode.GetString(textStream.ToArray());
    }
    builder.Append(extractedText);
}

dataDir = dataDir + "PDF_to_TXT_Raw.txt";
// Save the text file
File.WriteAllText(dataDir, builder.ToString());

Convert_TXT_PDF.cs

// Read input TXT file
System.IO.TextReader tr = new StreamReader(dataDir + "Test.txt", Encoding.UTF8, true);

// Initialize new Document
Document doc = new Document();

// Add blank page
Page page = doc.Pages.Add();
String strLine;

// Initiate TextBuilder object
TextBuilder builder = new TextBuilder(page);
double x = 100; double y = 100;
while ((strLine = tr.ReadLine()) != null)
{
 TextFragment text = new TextFragment(strLine);
 text.Position = new Position(x, y);
 if (y >= page.PageInfo.Height - 72)
 {
  y = 100;
  page = doc.Pages.Add();
  builder = new TextBuilder(page);
 }
 else
 {
  y += 15;
 }
 builder.AppendText(text);
}

// Save output PDF file
doc.Save(dataDir + "TexttoPDF.pdf");
tr.Close();