Generate Thumbnails of PowerPoint PPTX PPT in C#

readme.md

Read the complete article on generating thumbnails of PowerPoint PPTX/PPT presentations using C#: https://blog.aspose.com/2021/08/30/generate-pptx-thumbnails-using-csharp/

generate-pptx-thumbnail-custom-dimension.cs

// Load PowerPoint presentation
using (Presentation pres = new Presentation("presentation.pptx"))
{
    // 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;

    foreach (ISlide sld in pres.Slides)
    {
        // Create a full scale image
        Bitmap bmp = sld.GetThumbnail(ScaleX, ScaleY);

        // Save the image to disk in JPEG format
        bmp.Save(String.Format("slide_{0}.jpg", sld.SlideNumber), System.Drawing.Imaging.ImageFormat.Jpeg);
    }
}

generate-pptx-thumbnail.cs

// Load PowerPoint presentation
using (Presentation pres = new Presentation("presentation.pptx"))
{
    foreach (ISlide sld in pres.Slides)
    {
        // Create a full scale image
        Bitmap bmp = sld.GetThumbnail(1f, 1f);

        // Save the image to disk in JPEG format
        bmp.Save(String.Format("slide_{0}.jpg", sld.SlideNumber), System.Drawing.Imaging.ImageFormat.Jpeg);
    }
}