.net FileUpload上传图片 图片转换二进制,以及保存显示

   protected void Button1_Click(object sender, EventArgs e)
        {


            Stream stream = FileUpload1.PostedFile.InputStream;
            byte[] photo = new byte[FileUpload1.PostedFile.ContentLength];
            stream.Read(photo, 0, FileUpload1.PostedFile.ContentLength);
            stream.Close();
            

            System.Drawing.Image a = ByteToImage(photo);
            string imgname = DateTime.Now.ToString("yyyyMMddhhmmss") + ".jpg";
            string path = "Scripts/" + imgname;
            a.Save(Server.MapPath(path));
            this.Image1.ImageUrl = path; 
         
        }

--转换方法

  //图片转成二进制
        public byte[] ImageToBytes(System.Drawing.Image image)
        {
            ImageFormat format = image.RawFormat;
            using (MemoryStream ms = new MemoryStream())
            {
                if (format.Equals(ImageFormat.Jpeg))
                {
                    image.Save(ms, ImageFormat.Jpeg);
                }
                else if (format.Equals(ImageFormat.Png))
                {
                    image.Save(ms, ImageFormat.Png);
                }
                else if (format.Equals(ImageFormat.Bmp))
                {
                    image.Save(ms, ImageFormat.Bmp);
                }
                else if (format.Equals(ImageFormat.Gif))
                {
                    image.Save(ms, ImageFormat.Gif);
                }
                else if (format.Equals(ImageFormat.Icon))
                {
                    image.Save(ms, ImageFormat.Icon);
                }
                byte[] buffer = new byte[ms.Length];
                //Image.Save()会改变MemoryStream的Position，需要重新Seek到Begin
                ms.Seek(0, SeekOrigin.Begin);
                ms.Read(buffer, 0, buffer.Length);
                return buffer;
            }
        }


        //二进制转成图片  
        public System.Drawing.Image ByteToImage(byte[] imgData)
        {
            System.IO.MemoryStream ms = new System.IO.MemoryStream(imgData);
            System.Drawing.Image img = System.Drawing.Image.FromStream(ms);
            return img;
        }