How to take screenshot of image in a PDF using ASP.NET with C#?

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I want to take screenshot of image in a PDF using asp.net with C#. I have developed a PDF using adobe acrobat pro. I need to get the Image from the pdf as a screen shot or so and convert this image to a binary (base 64) file using c# .
I am able to take the screen shot of the page with the code part is running. But the unable to get the screen shot of a image in a PDF File

What I have tried:

public static void Capture(string CapturedFilePath)
      {
          Bitmap bitmap = new Bitmap
        (Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);

          Graphics graphics = Graphics.FromImage(bitmap as System.Drawing.Image);
          graphics.CopyFromScreen(25, 25, 25, 25, bitmap.Size);

          bitmap.Save(CapturedFilePath, ImageFormat.Bmp);
      }

Posted 21-Jul-17 2:20am

Alex2 101

Updated 21-Jul-17 7:09am

v2

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Dave Kreskowiak · Answer 1 · 2017-07-21T07:09:00

Considering all ASP.NET code runs ENTIRELY on the web server and not on the client, you can't do this.

You would need some javascript library to be able to capture screen shot on the client, which I'm not even entirely sure is possible given the security concerns.

Now, if you're talking about converting a PDF to an Image, you need to find a library that either does this for you or renders to an image instead of a file. Google for "pdf to image library[^]".