C#中Image与Byte数组互转

        /// <summary>
        /// 将Image转化为Byte数组
        /// </summary>
        /// <param name="img">要转化的图像</param>
        /// <returns>返回转化后的Byte字节数组</returns>
        public byte[] GetByteImage(Image img)
        {
            byte[] bt = null;
            if (!img.Equals(null))
            {
                using (MemoryStream mostream = new MemoryStream())
                {
                    Bitmap bmp = new Bitmap(img);
                    bmp.Save(mostream, System.Drawing.Imaging.ImageFormat.Bmp);//将图像以指定的格式存入缓存内存流
                    bt = new byte[mostream.Length];
                    mostream.Position = 0;//设置留的初始位置
                    mostream.Read(bt, 0, Convert.ToInt32(bt.Length));
                }
            }
            return bt;
        }

        /// <summary>
        /// 将Byte字节数组转化为Image图像
        /// </summary>
        /// <param name="bytes">Byte字节数组</param>
        /// <returns>返回转化后的图像</returns>
        public static Image GetImageByBytes(byte[] bytes)
        {
            Image photo = null;
            using (MemoryStream ms = new MemoryStream(bytes))
            {
                ms.Write(bytes, 0, bytes.Length);
                photo = Image.FromStream(ms, true);
            }
            return photo;
        }