Convert pdf to jpeg using a free c# solution [closed]

Question

I need to convert a pdf file into a jpeg using C#. And the solution (library) has to be free.

I have searched a lot of information but seems that I don't get anything clear.

I already tried itextsharp and pdfbox (but this, the pdf2image is only for java, I think) with no success.

I tried to extract the images from the pdf individually, but I have an error of invalid parameters when I try to extract the images... Seems that they have a strange encoding.

Anyone can recommend me any library to save a pdf into a jpeg? Examples will be very appreciated too.

Answer 1

The library pdfiumviewer might be helpful here. It is also available as nuget.

1. Create a new winforms app. Add nuget "PdfiumViewer" to it.
2. This will also add two native dll's named "pdfium.dll" in folders x86 and x64 to your project. Set "Copy to Output Directory" to "Copy Always".

3. Try out the following code (change paths to suit your setup).

       try     {         using (var document = PdfiumViewer.PdfDocument.Load(@"input.pdf"))         {             var image = document.Render(0, 300, 300, true);             image.Save(@"output.png", ImageFormat.Png);         }     }     catch (Exception ex)     {         // handle exception here;     } 

   Edit 2: Changed code to show that page index is 0 based as pointed out in comment by S.C. below

Edit 1: Updated solution Have you tried pdfsharp?

This link might be helpful

Answer 2

This is how I did it with PDFLibNet:

public void ConvertPDFtoHojas(string filename, String dirOut) {     PDFLibNet.PDFWrapper _pdfDoc = new PDFLibNet.PDFWrapper();     _pdfDoc.LoadPDF(filename);      for (int i = 0; i < _pdfDoc.PageCount; i++)     {          Image img = RenderPage(_pdfDoc, i);          img.Save(Path.Combine(dirOut, string.Format("{0}{1}.jpg", i,DateTime.Now.ToString("mmss"))));      }     _pdfDoc.Dispose();     return; } public  Image RenderPage(PDFLibNet.PDFWrapper doc, int page) {     doc.CurrentPage = page + 1;     doc.CurrentX = 0;     doc.CurrentY = 0;      doc.RenderPage(IntPtr.Zero);          // create an image to draw the page into         var buffer = new Bitmap(doc.PageWidth, doc.PageHeight);         doc.ClientBounds = new Rectangle(0, 0, doc.PageWidth, doc.PageHeight);         using (var g = Graphics.FromImage(buffer))         {             var hdc = g.GetHdc();             try             {                 doc.DrawPageHDC(hdc);             }             finally             {                 g.ReleaseHdc();             }         }         return buffer;  }