A generic error occurred in GDI+ exporting png on IIS7.0 about highcharts-export-module-asp.net HOT 6 CLOSED

Nice work. Could you provide a link to where this is discussed as a known issue? I'd like to read more.

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Sure. I found this:
http://stackoverflow.com/questions/5629251/c-sharp-outputting-image-to-response-output-stream-giving-gdi-error

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And also this:
http://www.west-wind.com/weblog/posts/2006/Oct/19/Common-Problems-with-rendering-Bitmaps-into-ASPNET-OutputStream

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Gianluca,

Thank you for providing that good information! It appears this only affects PNG images, though a couple remarks indicate this might affect other image types. Does JPEG work for you?

I appreciate your sample code. Your test for "image/png" duplicates the existing switch/case test in the WriteToStream() method, thus I believe I will work your fix into WriteToStream() directly. Something like this maybe?

case "image/png":
    // PNG output requires a seekable stream
    using (MemoryStream seekableStream = new MemoryStream())
    {
        CreateSvgDocument().Draw().Save(
            seekableStream,
            ImageFormat.Png);
        seekableStream.WriteTo(outputStream);
    }
    break;

I am not at my development machine, thus I will try this out later and upload it. Let me know if you see any errors in the above.

Thanks for your contribution!

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I have no problem with jpg.
I also prefer the code inside WriteToStream as you wrote.

Thanks for uploading so quickly.

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Not uploaded yet. That is only draft code scratched out in Notepad. I will attempt to get it done late tonight.

Thanks for the feedback on JPEG images.

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