Parameter is not valid exception on image.fromstream() method RSS

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  praveen.k

  Member

  127 Points

  209 Posts

  Parameter is not valid exception on image.fromstream() method

  Apr 07, 2011 03:46 PM|LINK

  Hi,

        i have written a code for resizing the images and its working good except for some images that too the issue is occuring only on locolhost(IIS). I have asynchronous file upload contorl and two button  controls. when clicked on first button  the asynchronous file upload control is saved in session using the following code

  Session["myupload"] = AsyncFileUpload1.PostedFile;

  The image is resized and saved in a folder when second button clicked. The following code will execute when clicked the second button.

  HttpPostedFile hif = (HttpPostedFile)Session["myupload"]
                          if (hif.ContentLength <= 20000000)
                          {
                              if (checkfiletype(hif.FileName))
                              {
                                  string spacefileName = hif.FileName;
                                                                 
                                  string storePath = Server.MapPath("~") + "/Docs";
                                  //MemoryStream source = hif.InputStream;
                                  Stream source = hif.InputStream;
                                  //source =(MemoryStream)hif.InputStream;
                                  byte[] input=new byte[hif.ContentLength];
                                  source.Read(input, 0, hif.ContentLength);
                                  string dest = Server.MapPath("~/Docs/" + fileName);
                                  Imageresize(dest, source);
                                 
  
  //calling imageresize method
  
  private void Imageresize(string dest, Stream src)
      {
          System.Drawing.Image img = System.Drawing.Image.FromStream(src);
          int srcWidth = img.Width;
          int srcHeight = img.Height;
          int _thumbnailSize = 620;
          int width, height;
          if (img.Width > img.Height)
          {
              width = _thumbnailSize;
              height = img.Height * _thumbnailSize / img.Width;
          }
          else
          {
              width = img.Width * _thumbnailSize / img.Height;
              height = _thumbnailSize;
          }
          Bitmap target = new Bitmap(width, height);
          Graphics graphics = Graphics.FromImage(target);
          graphics.SmoothingMode = SmoothingMode.HighQuality;
          graphics.CompositingQuality = CompositingQuality.HighQuality;
          graphics.InterpolationMode = InterpolationMode.High;
          Rectangle rectDestination = new Rectangle(0, 0, width, height);
          graphics.DrawImage(img, rectDestination, 0, 0, srcWidth, srcHeight, GraphicsUnit.Pixel);
          target.Save(dest);
          target.Dispose();
          img.Dispose();
      }

   

  Could any one help me why the issue is getting on Localhost only.

  Thanks

   

  Praveen
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  nathanael.jo...

  Member

  137 Points

  37 Posts

  Re: Parameter is not valid exception on image.fromstream() method

  May 03, 2011 06:24 PM|LINK

  Remove the following two lines of code and it should work. Remember that Image.FromStream() needs a stream that has been Seek()'d to byte 0, or hasn't been read from.

  byte[] input=new byte[hif.ContentLength];
  source.Read(input, 0, hif.ContentLength);