Convert PDF to 1-bit black and white PNG in C# and .NET


Complete code

using System;
using System.IO;

namespace Sample
{
    class Sample
    {
        static void Main(string[] args)
        {
                                  // Get your free 30-day key here:   
			 // https://sautinsoft.com/start-for-free/
			
            //How to convert PDF to 1-bit black and white PNG
            SautinSoft.PdfFocus f = new SautinSoft.PdfFocus();
	    	
            string pdfPath = Path.GetFullPath(@"..\..\..\Potato Beetle.pdf");
            string imagePath = "Result.png";

            f.OpenPdf(pdfPath);

            if (f.PageCount > 0)
            {
                //save 1st page to png file, 200 dpi
                f.ImageOptions.ImageFormat = SautinSoft.PdfFocus.CImageOptions.ImageFormats.Png;
                f.ImageOptions.Dpi = 200;
                //Make "Black and White 1-bit indexed" image
                f.ImageOptions.ColorDepth = SautinSoft.PdfFocus.CImageOptions.eColorDepth.BlackWhite1bpp;

                if (f.ToImage(imagePath, 1) == 0)
                {
                    // 0 - converting successfully                
                    // 2 - can't create output file, check the output path
                    // 3 - converting failed
                    System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(imagePath) { UseShellExecute = true });
                }
            }
        }
    }
}

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Imports System
Imports System.IO

Namespace Sample
	Friend Class Sample
		Shared Sub Main(ByVal args() As String)
								  ' Get your free 30-day key here:   
			 ' https://sautinsoft.com/start-for-free/

			'How to convert PDF to 1-bit black and white PNG
			Dim f As New SautinSoft.PdfFocus()

			Dim pdfPath As String = Path.GetFullPath("..\..\..\Potato Beetle.pdf")
			Dim imagePath As String = "Result.png"

			f.OpenPdf(pdfPath)

			If f.PageCount > 0 Then
				'save 1st page to png file, 200 dpi
				f.ImageOptions.ImageFormat = SautinSoft.PdfFocus.CImageOptions.ImageFormats.Png
				f.ImageOptions.Dpi = 200
				'Make "Black and White 1-bit indexed" image
				f.ImageOptions.ColorDepth = SautinSoft.PdfFocus.CImageOptions.eColorDepth.BlackWhite1bpp

				If f.ToImage(imagePath, 1) = 0 Then
					' 0 - converting successfully                
					' 2 - can't create output file, check the output path
					' 3 - converting failed
					System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(imagePath) With {.UseShellExecute = True})
				End If
			End If
		End Sub
	End Class
End Namespace

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