Image.FromStream 抛出 OutOfMemoryException

Question

当我调用下一个代码时，我在同一方法上随机得到一个 OutOfMemoryException：

private byte[] RotateImage(byte[] array)
    {
        if (array == null)
            return null;

        using (var memoryStream = new MemoryStream(array))
        {
            using (var image = Image.FromStream(memoryStream))
            {
                //create a new empty bitmap to hold rotated image
                using (var rotatedBmp = new Bitmap(image.Width, image.Height))
                {
                    rotatedBmp.SetResolution(image.HorizontalResolution, image.VerticalResolution);
                    //make a graphics object from the empty bitmap
                    using (var g = Graphics.FromImage(rotatedBmp))
                    {
                        g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
                        g.TranslateTransform((float)image.Width / 2, (float)image.Height / 2);
                        //rotate the image
                        g.RotateTransform(180);
                        g.TranslateTransform(-(float)image.Width / 2, -(float)image.Height / 2);
                        //draw passed in image onto graphics object
                        g.DrawImage(image, 0, 0, image.Width, image.Height);
                        g.Save();
                    }

                    using (var stream = new MemoryStream())
                    {
                        rotatedBmp.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
                        return stream.ToArray();
                    }
                }
            }
        }
    }

生产服务器有 48gb 的内存……几乎 40gb 空闲。 我添加了几行来显式调用garbagecollection，但它仍然在发生。

Answer 1

解决了将 IIS 进程从 32 位更改为 64 位的问题。