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.

Example

//Instantiate the 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
    using (IImage image = sld.GetImage(scaleX, scaleY))
    {
        //Save the image to disk in JPEG format
        image.Save("Thumbnail2.jpg", ImageFormat.Jpeg);
    }
}

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Download Sample Code

Generate Slide Thumbnail as JPEG Presentation Locking