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#.

Download and run

Download the complete project, extract it, and open Example.sln or run:

dotnet restore Example.sln
dotnet run --project Example.csproj -- --mode evaluation

The download includes every case below, its fixture helpers and inputs. Program.cs runs all cases; use --action block-001 to run one independently. Outputs and an action report are written to the printed output directory. No previous example or working-directory setup is required. Evaluation adds a watermark and can truncate read-back text; the short fixtures still have explicit structural checks. For full text and no watermark, use --mode licensed --license PATH with your own valid license. See the setup guide for supported SDKs and native prerequisites.

Each printed CaseNN.cs file is compiled verbatim. The download checks each case in CaseVerification.cs before saving and after reopening the result.

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.

using Aspose.Slides;

internal static partial class Program
{
    static void Case01()
    {
        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);

        VerifyCase01(presentation);
    }
}

💡 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.

Master and Layout Relationship

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.

using Aspose.Slides;

internal static partial class Program
{
    static void Case02()
    {
        // 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];

        VerifyCase02(presentation);
    }
}

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.

using Aspose.Slides;

internal static partial class Program
{
    static void Case03()
    {
        // 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);

        VerifyCase03(presentation);
    }
}

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.

using Aspose.Slides;

internal static partial class Program
{
    static void Case04()
    {
        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);

        clonedSlide.Name = "Clone";

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

        VerifyCase04(presentation);
    }
}

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.

using Aspose.Slides;

internal static partial class Program
{
    static void Case05()
    {
        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);

        VerifyCase05(presentation);
    }
}
Layout Slide