How to convert PDF files to images

Question

I need to convert PDF files to images. If the PDF file is multi-page，I just need one image that contains all of the PDF pages.

Is there an open sou

Answer 1

Regarding PDFiumSharp: After elaboration I was able to create PNG files from a PDF solution.

This is my code:

using PDFiumSharp;
using System.Collections.Generic;
using System.Drawing;
using System.IO;

public class Program
{
    static public void Main(String[] args)
    {
        var renderfoo = new Renderfoo()
        renderfoo.RenderPDFAsImages(@"C:\Temp\example.pdf", @"C:\temp");
    }
}



public class Renderfoo
{

    public void RenderPDFAsImages(string Inputfile, string OutputFolder)
    {
        string fileName = Path.GetFileNameWithoutExtension(Inputfile);

        using (PDFiumSharp.PdfDocument doc = new PDFiumSharp.PdfDocument(Inputfile))
        {
            for (int i = 0; i < doc.Pages.Count; i++)
            {
                var page = doc.Pages[i];
                using (var bitmap = new System.Drawing.Bitmap((int)page.Width, (int)page.Height))
                {
                    var grahpics = Graphics.FromImage(bitmap);
                    grahpics.Clear(Color.White);
                    page.Render(bitmap);
                    var targetFile = Path.Combine(OutputFolder, fileName + "_" + i + ".png");
                    bitmap.Save(targetFile);
                }
            }
        }
    }

}

For starters, you need to take the following steps to get the PDFium wrapper up and running:

• Run the Custom Code tool for both tt files via right click in Visual Studio
• Compile the GDIPlus Project
• Copy the compiled assemblies (from the GDIPlus project) to your project

• Reference both PDFiumSharp and PDFiumsharp.GdiPlus assemblies in your project

• Make sure that pdfium_x64.dll and/or pdfium_x86.dll are both found in your project output directory.