How to convert PDF to Word in C# (.NET)

using GdPicture14;

LicenseManager licenseManager = new LicenseManager();
licenseManager.RegisterKEY("");

Imports GdPicture14

Dim licenseManager As New LicenseManager()
licenseManager.RegisterKEY("")

using GdPictureDocumentConverter converter = new();
GdPictureStatus status = converter.LoadFromFile("input.pdf");
if (status != GdPictureStatus.OK)
{
    throw new Exception(status.ToString());
}

status = converter.SaveAsDOCX("output.docx");
if (status != GdPictureStatus.OK)
{
    throw new Exception(status.ToString());
}

Console.WriteLine("The input document has been converted to a docx file");

Using converter As New GdPictureDocumentConverter()
    Dim status As GdPictureStatus = converter.LoadFromFile("input.pdf")
    If status <> GdPictureStatus.OK Then
        Throw New Exception(status.ToString())
    End If

    status = converter.SaveAsDOCX("output.docx")
    If status <> GdPictureStatus.OK Then
        Throw New Exception(status.ToString())
    End If

    Console.WriteLine("The input document has been converted to a docx file")
End Using

using GdPictureDocumentConverter converter = new();
GdPictureStatus status = converter.LoadFromFile("input.pdf");
if (status != GdPictureStatus.OK)
{
    throw new Exception(status.ToString());
}

// Set image quality.
converter.DocxImageQuality = 80;

status = converter.SaveAsDOCX("output.docx");
if (status != GdPictureStatus.OK)
{
    throw new Exception(status.ToString());
}

Using converter As New GdPictureDocumentConverter()
    Dim status As GdPictureStatus = converter.LoadFromFile("input.pdf")
    If status <> GdPictureStatus.OK Then
        Throw New Exception(status.ToString())
    End If

    ' Set image quality
    converter.DocxImageQuality = 80

    status = converter.SaveAsDOCX("output.docx")
    If status <> GdPictureStatus.OK Then
        Throw New Exception(status.ToString())
    End If
End Using

using System.IO;
using GdPicture14;

public byte[] ConvertPdfToWordFromStream(Stream pdfStream)
{
    using GdPictureDocumentConverter converter = new();

    GdPictureStatus status = converter.LoadFromStream(pdfStream, GdPicture14.DocumentFormat.DocumentFormatPDF);
    if (status != GdPictureStatus.OK)
    {
        throw new Exception($"Failed to load PDF: {status}");
    }

    using MemoryStream outputStream = new();
    status = converter.SaveAsDOCX(outputStream);
    if (status != GdPictureStatus.OK)
    {
        throw new Exception($"Failed to convert: {status}");
    }

    return outputStream.ToArray();
}

Imports System.IO
Imports GdPicture14

Public Function ConvertPdfToWordFromStream(pdfStream As Stream) As Byte()
    Using converter As New GdPictureDocumentConverter()
        Dim status As GdPictureStatus = converter.LoadFromStream(pdfStream, GdPicture14.DocumentFormat.DocumentFormatPDF)
        If status <> GdPictureStatus.OK Then
            Throw New Exception($"Failed to load PDF: {status}")
        End If

        Using outputStream As New MemoryStream()
            status = converter.SaveAsDOCX(outputStream)
            If status <> GdPictureStatus.OK Then
                Throw New Exception($"Failed to convert: {status}")
            End If

            Return outputStream.ToArray()
        End Using
    End Using
End Function

using GdPicture14;

public void ConvertScannedPdfToWord(string inputPath, string outputPath, string ocrResourcePath)
{
    using GdPicturePDF pdf = new();
    pdf.LoadFromFile(inputPath);

    for (int i = 1; i <= pdf.GetPageCount(); i++)
    {
        pdf.SelectPage(i);
        // Parameters: language, OCR resource folder, character allowlist, DPI
        pdf.OcrPage("eng", ocrResourcePath, "", 300);
    }

    string tempOcrPath = Path.GetTempFileName() + ".pdf";
    pdf.SaveToFile(tempOcrPath);
    pdf.CloseDocument();

    using GdPictureDocumentConverter converter = new();
    converter.LoadFromFile(tempOcrPath);
    converter.SaveAsDOCX(outputPath);

    File.Delete(tempOcrPath);
}

// Usage:
// ConvertScannedPdfToWord("input.pdf", "output.docx", @"C:\GdPicture.NET 14\Redist\OCR");

Imports GdPicture14

Public Sub ConvertScannedPdfToWord(inputPath As String, outputPath As String, ocrResourcePath As String)
    Using pdf As New GdPicturePDF()
        pdf.LoadFromFile(inputPath)

        For i As Integer = 1 To pdf.GetPageCount()
            pdf.SelectPage(i)
            ' Parameters: language, OCR resource folder, character allowlist, DPI
            pdf.OcrPage("eng", ocrResourcePath, "", 300)
        Next

        Dim tempOcrPath As String = Path.GetTempFileName() + ".pdf"
        pdf.SaveToFile(tempOcrPath)
        pdf.CloseDocument()

        Using converter As New GdPictureDocumentConverter()
            converter.LoadFromFile(tempOcrPath)
            converter.SaveAsDOCX(outputPath)
        End Using

        File.Delete(tempOcrPath)
    End Using
End Sub

' Usage:
' ConvertScannedPdfToWord("input.pdf", "output.docx", "C:\GdPicture.NET 14\Redist\OCR")

public void BatchConvertPdfsToWord(string[] inputPaths, string outputDirectory)
{
    foreach (string inputPath in inputPaths)
    {
        using GdPictureDocumentConverter converter = new();
        GdPictureStatus status = converter.LoadFromFile(inputPath);

        if (status == GdPictureStatus.OK)
        {
            string outputPath = Path.Combine(
                outputDirectory,
                Path.GetFileNameWithoutExtension(inputPath) + ".docx"
            );

            converter.SaveAsDOCX(outputPath);
            Console.WriteLine($"Converted: {inputPath}");
        }
    }
}

Public Sub BatchConvertPdfsToWord(inputPaths As String(), outputDirectory As String)
    For Each inputPath As String In inputPaths
        Using converter As New GdPictureDocumentConverter()
            Dim status As GdPictureStatus = converter.LoadFromFile(inputPath)

            If status = GdPictureStatus.OK Then
                Dim outputPath As String = Path.Combine(
                    outputDirectory,
                    Path.GetFileNameWithoutExtension(inputPath) + ".docx"
                )

                converter.SaveAsDOCX(outputPath)
                Console.WriteLine($"Converted: {inputPath}")
            End If
        End Using
    Next
End Sub