Converting from Graphics or Bitmap back to Image [Answered]RSS

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  atholonxp

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  Converting from Graphics or Bitmap back to Image

  Jul 06, 2010 01:08 PM|atholonxp|LINK

  Is there a way to set an Bitmap object back to an Image object in .net?

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  rajum

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  Re: Converting from Graphics or Bitmap back to Image

  Jul 06, 2010 02:32 PM|rajum|LINK

  Bitmap bmp = new Bitmap("file");
          bmp.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);

  Bitmap

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  atholonxp

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  Re: Converting from Graphics or Bitmap back to Image

  Jul 06, 2010 02:50 PM|atholonxp|LINK

  
  

  Image originalImage = Image.FromFile(fromPath);
  var thumbnailBitmap = new Bitmap((int)newImageWidth, (int)newImageHeight);
  var thumbnailGraph = Graphics.FromImage(thumbnailBitmap);
  var imageRectangle = new Rectangle(0, 0, (int)newImageWidth, (int)newImageHeight);
  thumbnailGraph.DrawImage((Bitmap)originalImage, imageRectangle);

  I am sorry but I don't see how that is saving the image as an Image object.

  I am using GD+ to create a thumbnail so I use something like what I pasted above. The problem is that I want to do some more stuff using the Image object.

  Can I just cast the bitmap to the Image type?

  
  

  <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste">var thumbnailBitmap = new Bitmap((int)newImageWidth, (int)newImageHeight);</div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste"></div> <div style="position: absolute; left: -10000px; top: 0px; width: 1px; height: 1px; overflow-x: hidden; overflow-y: hidden;" id="_mcePaste">                var thumbnailGraph = Graphics.FromImage(thumbnailBitmap);</div>

  
  

  
  

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  atholonxp

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  Re: Converting from Graphics or Bitmap back to Image

  Jul 06, 2010 03:14 PM|atholonxp|LINK

  Doh, it looks like you don't even need to cast.

  I just did Image originalImage = thumbnailBitmap;

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  rajum

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  Re: Converting from Graphics or Bitmap back to Image

  Jul 06, 2010 03:20 PM|rajum|LINK

  Image originalImage = Image.FromFile(fromPath);
          var thumbnailBitmap = new Bitmap(originalImage,(int)newImageWidth, (int)newImageHeight);
          using (Graphics g = Graphics.FromImage(thumbnailBitmap))
          {
              g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
              g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
              g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
              g.DrawImage(thumbnailBitmap, 0, 0, (int)newImageWidth, (int)newImageHeight);
              g.Dispose(); originalImage.Dispose(); GC.Collect();
          }