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I am looking for a simple solution for converting a PDF file into any image format. I am trying to avoid using paid libraries.

The goal is to, after converion, show a preview of the first PDF page inside a panel. To accomplish that, I need to convert at least the first page of the file into an image format. I will have to stamp a code bar into the file, then convert it back to PDF (although this part is not the problem).

I would greatly appreciate if any of you could point me in the right direction.

Cheers!
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Wandaboiii 27-Oct-14 14:19pm    
Hi. this is Andile here is a very simplest way to convert PDF file with Apitron PDF Rasterizer for .NET

I generally use GhostScript[^] for this type of conversion.

It's possible to load the DLL in-process and use P/Invoke to call it, but I usually shell out to the command-line version. That way, a corrupt or very large PDF won't affect my application.

How To Convert PDF to Image Using Ghostscript API[^]
 
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// open and load the file
using (FileStream fs = new FileStream(@"Documents\TestFile.pdf", FileMode.Open))
{
// this object represents a PDF document
Document document = new Document(fs);

// default rendering settings
RenderingSettings settings = new RenderingSettings();

// process and save pages one by one
for (int i = 0; i < document.Pages.Count; i++)
{
Page currentPage = document.Pages[i];

// we use original page's width and height for image as well as default rendering settings
using (Bitmap bitmap = currentPage.Render((int)currentPage.Width, (int)currentPage.Height,settings))
{
bitmap.Save(string.Format("{0}.png", i), ImageFormat.Png);
}
}
// preview first rendered page
Process.Start("0.png");
}
 
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Comments
Sergey Alexandrovich Kryukov 27-Oct-14 15:31pm    
It would be a very good solution if you provided all essential detail. Does it use Apitron software? (You only mentioned it in a comment; nothing tells us that it is related to your answer.) If it does, reference the product (provide a link), explain what assembly should be referenced, write exact full type name of the "Document" type, probably some other important detail. Just a few extra words could eliminate the confusion. (I did not vote.)
—SA
BMicka 19-Dec-19 5:07am    
Apitron - bad output quality even paid and watermark. No solution.

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