Generating a Thumbnail from a Slide with User Defined Dimensions

To generate the thumbnail of any desired slide using Aspose.Slides for .NET:

  • Create an instance of the Presentation class.
  • Obtain the reference of any desired slide by using its ID or index.
  • Get the X and Y scaling factors based on user defined X and Y dimensions.
  • Get the thumbnail image of the referenced slide on a specified scale.
  • Save the thumbnail image in any desired image format.


 //Instantiate a Presentation class that represents the presentation file

using (Presentation pres = new Presentation("TestPresentation.pptx"))


  //Access the first slide

  ISlide sld = pres.Slides[0];

  //User defined dimension

  int desiredX = 1200;

  int desiredY = 800;

  //Getting scaled value  of X and Y

  float ScaleX = (float)(1.0 / pres.SlideSize.Size.Width) * desiredX;

  float ScaleY = (float)(1.0 / pres.SlideSize.Size.Height) * desiredY;

  //Create a full scale image

  Bitmap bmp = sld.GetThumbnail(ScaleX, ScaleY);

  //Save the image to disk in JPEG format

  bmp.Save("Thumbnail2.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);

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