Slide

This article provides a series of examples that demonstrate how to work with slides using Aspose.Slides for .NET. You’ll learn how to add, access, clone, reorder, and remove slides using the Presentation class.

Each example below includes a brief explanation followed by a code snippet in C#.

Add a Slide

To add a new slide, you must first select a layout. In this example, we use the Blank layout and add an empty slide to the presentation.

static void AddSlide()
{
    using var presentation = new Presentation();

    // Each slide is based on a layout, which itself is based on a master slide.
    // Use the Blank layout to create a new slide.
    var blankLayout = presentation.LayoutSlides.GetByType(SlideLayoutType.Blank);

    // Add a new empty slide using the selected layout.
    presentation.Slides.AddEmptySlide(layout: blankLayout);
}

💡 Note: Each slide layout is derived from a master slide, which defines the overall design and placeholder structure. The image below illustrates how master slides and their associated layouts are organized in PowerPoint.

Access Slides by Index

You can access slides using their index, or find a slide’s index based on a reference. This is useful for iterating through or modifying specific slides.

static void AccessSlide()
{
    // By default, a presentation is created with one empty slide.
    using var presentation = new Presentation();

    // Add another empty slide.
    var blankLayout = presentation.LayoutSlides.GetByType(SlideLayoutType.Blank);
    presentation.Slides.AddEmptySlide(layout: blankLayout);

    // Access slides by index.
    var firstSlide = presentation.Slides[0];
    var secondSlide = presentation.Slides[1];

    // Get slide index from a reference, then access it by index.
    var secondSlideIndex = presentation.Slides.IndexOf(secondSlide);
    var secondSlideByIndex = presentation.Slides[secondSlideIndex];
}

Clone a Slide

This example demonstrates how to clone an existing slide. The cloned slide is automatically added to the end of the slide collection.

static void CloneSlide()
{
    // By default, the presentation contains one empty slide.
    using var presentation = new Presentation();
    var firstSlide = presentation.Slides[0];

    // Clone the first slide; it will be added at the end of the presentation.
    var clonedSlide = presentation.Slides.AddClone(sourceSlide: firstSlide);

    // The cloned slide index is 1 (second slide in the presentation).
    var clonedSlideIndex = presentation.Slides.IndexOf(clonedSlide);
}

Reorder Slides

You can change the order of slides by moving one to a new index. In this case, we move a cloned slide to the first position.

static void ReorderSlide()
{
    using var presentation = new Presentation();
    var firstSlide = presentation.Slides[0];

    // Add a clone of the first slide (created by default).
    var clonedSlide = presentation.Slides.AddClone(firstSlide);

    // Move the cloned slide to the first position (others shift down).
    presentation.Slides.Reorder(index: 0, clonedSlide);
}

Remove a Slide

To remove a slide, simply reference it and call Remove. This example adds a second slide and then removes the original, leaving only the new one.

static void RemoveSlide()
{
    using var presentation = new Presentation();

    // Add a new empty slide in addition to the default first slide.
    var blankLayout = presentation.LayoutSlides.GetByType(SlideLayoutType.Blank);
    var secondSlide = presentation.Slides.AddEmptySlide(layout: blankLayout);

    // Remove the first slide; only the newly added slide will remain.
    var firstSlide = presentation.Slides[0];
    presentation.Slides.Remove(firstSlide);
}