Hi,

This seems to be a bit of an infamous error all over the web. So much so that I have been unable to find an answer to my problem as my scenario doesn't fit. An exception gets thrown when I save the image to the stream.

Weirdly this works perfectly with a png but gives the above error with jpg and gif which is rather confusing.

Most similar problem out there relate to saving images to files without permissions. Ironically the solution is to use a memory stream as I am doing....

    public static byte[] ConvertImageToByteArray(Image imageToConvert)
    {
        using (var ms = new MemoryStream())
        {
            ImageFormat format;
            switch (imageToConvert.MimeType())
            {
                case "image/png":
                    format = ImageFormat.Png;
                    break;
                case "image/gif":
                    format = ImageFormat.Gif;
                    break;
                default:
                    format = ImageFormat.Jpeg;
                    break;
            }

            imageToConvert.Save(ms, format);
            return ms.ToArray();
        }
    }

More detail to the exception. The reason this causes so many issues is the lack of explanation :(

System.Runtime.InteropServices.ExternalException was unhandled by user code
Message="A generic error occurred in GDI+."
Source="System.Drawing"
ErrorCode=-2147467259
StackTrace:
   at System.Drawing.Image.Save(Stream stream, ImageCodecInfo encoder, EncoderParameters    encoderParams)
   at System.Drawing.Image.Save(Stream stream, ImageFormat format)
   at Caldoo.Infrastructure.PhotoEditor.ConvertImageToByteArray(Image imageToConvert) in C:\Users\Ian\SVN\Caldoo\Caldoo.Coordinator\PhotoEditor.cs:line 139
   at Caldoo.Web.Controllers.PictureController.Croppable() in C:\Users\Ian\SVN\Caldoo\Caldoo.Web\Controllers\PictureController.cs:line 132
   at lambda_method(ExecutionScope , ControllerBase , Object[] )
   at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters)
   at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
   at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClassa.<InvokeActionMethodWithFilters>b__7()
   at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation)
 InnerException:

OK things I have tried so far.

1. Cloning the image and working on that.
2. Retrieving the encoder for that MIME passing that with jpeg quality setting.

Please can anyone help.