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How to draw an image from a byte[] or stream?

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omgsauce

Post subject: How to draw an image from a byte[] or stream?

Posted: Sat Sep 08, 2012 12:03 am

Joined: Fri Sep 07, 2012 11:57 pm
Posts: 1

Hi,
I am trying to draw an image to a pdf. The only examples I have found are using XImage, which I can only seem to find a way to create using an image file path.

However, my files are saved in database as byte[], and the application that will be generating PDFs will not have permission to save files(so I cant save, open, delete). Is there a way to draw images using PDFSharp?

I am hoping to avoid having to purchase asppdf, which is quite pricey.

Thank you for any help.

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dheijl

Post subject: Re: How to draw an image from a byte[] or stream?

Posted: Mon Sep 10, 2012 7:34 am

Joined: Fri Apr 13, 2012 6:33 am
Posts: 10

Provided you're using pdfsharp and not migradoc:

Code:

            // byte[] jpegdata contains the jpeg image 
            using (MemoryStream ms = new MemoryStream(jpegdata)) {
                using (Image img = Image.FromStream(ms)) {
                    using (var xi = XImage.FromGdiPlusImage(img)) {
                        _pdfGfx.DrawImage(xi, ip.dx, ip.dy, ip.dw, ip.dh);
                    }
                }
            }

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TH-Soft

Post subject: Re: How to draw an image from a byte[] or stream?

Posted: Tue Sep 22, 2015 7:58 am

PDFsharp Guru

Joined: Sat Mar 14, 2015 10:15 am
Posts: 1044
Location: CCAA

Hi!

dheijl wrote:

Provided you're using pdfsharp and not migradoc

With version 1.50 beta 2, there is a solution for that works with MigraDoc: pass the image as a string when you call AddImage():
http://pdfsharp.net/wiki/MigraDoc_FilelessImages.ashx
This method applies to MigraDoc only.
With PDFsharp you can create an XImage from a Stream.

_________________
Best regards
Thomas
(Freelance Software Developer with several years of MigraDoc/PDFsharp experience)

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Thomas Hoevel

Post subject: Re: How to draw an image from a byte[] or stream?

Posted: Thu Mar 06, 2025 6:16 am

PDFsharp Guru

Joined: Mon Oct 16, 2006 8:16 am
Posts: 3128
Location: Cologne, Germany

Provided you're using pdfsharp and not migradoc:

Code:

// byte[] jpegdata contains the jpeg image.
using (MemoryStream ms = new MemoryStream(jpegdata))
{
    using (XImage img = XImage.FromStream(ms))
    {
        gfx.DrawImage(img, ip.dx, ip.dy, ip.dw, ip.dh);
    }
}

It is not necessary to create an Image object as an intermediate step.

For the Core build of PDFsharp, it is more efficient to create a MemoryStream with a public buffer:

Code:

// byte[] jpegdata contains the jpeg image.
using (MemoryStream ms = new MemoryStream(jpegdata, 0, jpegdata.Length, false, true))
{
    using (XImage img = XImage.FromStream(ms))
    {
        gfx.DrawImage(img, ip.dx, ip.dy, ip.dw, ip.dh);
    }
}

_________________
Regards
Thomas Hoevel
PDFsharp Team

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