Several methods of C # background processing pictures _c# Tutorial

This article describes several ways to use C # to handle pictures in the background, with the following specific code:

First: Save uploaded images directly to local

 var supportedtypes = new[] {"JPG", "JPEG", "PNG", "GIF", "BMP"};
          var fileName = system.web.httpcontext.current.request.files[0]. FileName;
          var fileext = System.IO.Path.GetExtension (fileName). Substring (1);
          if (!supportedtypes.contains (fileext))
          {return
            Json (new {msg =-1});
          }

          Random r = new Random ();
          var filename = DateTime.Now.ToString ("YYYYMMDDHHMMSS") + R.next (10000) + "." + Fileext;
          var filepath = Path.Combine (Server.MapPath ("~/avatar/temp"), filename);
          Head. SaveAs (filepath);

Second: Convert a picture to a byte type

FilePath Picture Physical Address
FileStream fs = new FileStream (FilePath, FileMode.Open);
          byte[] Bydata = new Byte[fs. Length];
          Fs. Read (bydata, 0, bydata.length);
          Fs. Close ();

Third: Convert uploaded images to byte type

 Httppostedfile file = system.web.httpcontext.current.request.files[0];

        if ((file = = null))
        {return
          Json (new {Success = false, Msg = "Upload picture failed", Path = ""});
        }
        else
        {
          System.Drawing.Image Image = System.Drawing.Image.FromStream (file. InputStream);

          MemoryStream ms = new MemoryStream ();
          Image. Save (MS, System.Drawing.Imaging.ImageFormat.Jpeg);

          byte[] Bytedata = new Byte[ms. Length];
          Ms. Position = 0;
          Ms. Read (bytedata, 0, bytedata.length);
          Ms. Close ();
          Image. Dispose ();

         
        }
      }

The above is a small series to introduce the C # background processing pictures of several ways, I hope to help you, if you have any questions please give me a message, small series will promptly reply to everyone. Here also thank you very much for the cloud Habitat Community website support!