.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, , 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(, SeekOrigin.Begin);
                 ms.Read(buffer, , 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;
         }