把数据中的二进制图片导入到XML，再读出来

Question

        /// <summary> 
        /// 把 Base64 转图片
        /// </summary> 
        /// <param name="base64String"></param> 
        public static MemoryStream Base64ToImage(string base64String)
        {
            // base64String.Substring(0, base64String.Length / 40 * 40) 主要是 Base64 編碼長度有規定必須是 0 或 4 的整數倍，所以為免出錯，把長度處理一下 
            byte[] imageBytes = Convert.FromBase64String(base64String);
            // byte[] imageBytes = Convert.FromBase64String(base64String.Substring(0,128)); 
            MemoryStream _ms = new MemoryStream(imageBytes, 0, imageBytes.Length);            // Convert byte[] to Image 
            _ms.Write(imageBytes, 0, imageBytes.Length);
            /*
            System.Drawing.Image image = System.Drawing.Image.FromStream(ms, true);            image.Save(Server.MapPath("Report"), ImageFormat.Png);
            */
            return _ms;
        }        // 把图片转 Base64 编码
        public static string ImageToBase64(System.Drawing.Image image, System.Drawing.Imaging.ImageFormat format)
        {
            using (MemoryStream ms = new MemoryStream())
            {
                // Convert Image to byte[] 
                image.Save(ms, format);
                byte[] imageBytes = ms.ToArray();                // Convert byte[] to Base64 String 
                string base64String = Convert.ToBase64String(imageBytes);
                return base64String;
            }
        }ImageToBase64 将流转成字符串,然后保存
MemoryStream  将字符串转成流进行显示

Answer 1

http://blog.sina.com.cn/s/blog_607015bb0100mxd3.html