How to convert gif images to jpeg in c# code winforms?

Question

I am trying to convert my gif/png images to jpeg then after that i want to pass these images to sqldatabase. Because crystal report doesnot support gif images for displaying as a report.

So now i have a problem to covert gif images to jpeg.

Sample code:

data = File.ReadAllBytes(ImgPath);

data is byte[] type so i have image path now i want to convert into jpeg before ReadAllBytes() callls

I tried like this :

   using (Image img = Image.FromFile(ImgPath))
   {
             img.Save(ImgPath, System.Drawing.Imaging.ImageFormat.Jpeg);
   }

But i got Generic error Gdi something is came. thanks.

Your error is because you opened the image, kept it open, and then tried to save it over itself (while open) as a new format. — DonBoitnott, Jan 29 '16 at 13:49

bdn02 · Answer 1 · 2016-01-29T08:36:17.213

1

This is the code:

        byte[] imagebuffer;

        using (Image img = Image.FromFile(@"c:\temp_10\sample.gif"))
        using (MemoryStream ms = new MemoryStream())
        {
            img.Save(ms, ImageFormat.Jpeg);
            imagebuffer = ms.ToArray();
        }

        //write to fs (if you need...)
        File.WriteAllBytes(@"c:\temp_10\sample.jpg", imagebuffer);

The namespace to use is System.Drawing

I've modified my code, i think that you don't need the file on filesystem but you can use the byte array to call Crystal report

edited Jan 29 '16 at 08:36

answered Jan 29 '16 at 07:40

bdn02

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What error? Are you sure that the original file is a gif? – bdn02 Jan 29 '16 at 07:44
i got an error like this : A generic error occured in GDI+ – Nag Jan 29 '16 at 07:48
Check if your application has permissions to read/write those files – Justinas Kanguras Jan 29 '16 at 07:49
4.5 version before that it's working good. before converting an format. directly get the path and store the image good. but now there is a problem – Nag Jan 29 '16 at 07:54
_I got an error like this : A generic error occured in GDI+_ __On which line???__ – TaW Jan 29 '16 at 19:29

score 0 · Answer 2 · edited May 23 '17 at 11:59

Here are two places that can help. One is Microsoft's site on how to read in image files to memory.

https://msdn.microsoft.com/en-us/library/twss4wb0(v=vs.90).aspx

The next is an example from another user on the site on how to read the file into a bite array as the format you want. I am assuming you want it as a byte array so you can do something with it rather than put it back down as a file.

How to convert image in byte array

I would have typed it all out but found the examples and they were self explanatory. :-)

score 0 · Answer 3 · edited Aug 21 '18 at 14:15

0

I think you can go even simpler than bdn02's answer. Try:

Image img = Image.FromFile(@"c:\temp_10\sample.gif");
img.Save(@"c:\temp_10\sample.jpg", ImageFormat.Jpeg);

edited Aug 21 '18 at 14:15

Stephen Rauch

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answered Aug 21 '18 at 13:53

Dave Elderkin

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How to convert gif images to jpeg in c# code winforms?

3 Answers3