Aspose.Slides FOSS
.NET
Getting Started
Quick Start

Quick Start

Quick Start

This guide shows the fastest path from installation to a saved .pptx file using Aspose.Slides FOSS for .NET. The library is MIT-licensed, requires no Microsoft Office, and runs on .NET 9.0 or later across Windows, macOS, and Linux.

Prerequisites

RequirementDetail
.NET9.0 or later
OSWindows, macOS, Linux, Docker
PackageAspose.Slides.Foss from NuGet

Install

Install the package from NuGet. Always use the using statement with Presentation since it implements IDisposable:

dotnet add package Aspose.Slides.Foss

Create a Presentation

Construct a Presentation with no arguments to create a blank deck. The library automatically adds one empty slide. Call Save() with a path and SaveFormat.Pptx:

using Aspose.Slides.Foss;
using Aspose.Slides.Foss.Export;

using var prs = new Presentation();
prs.Save("empty.pptx", SaveFormat.Pptx);

Add a Shape with Text

Access the first slide via prs.Slides[0], insert a rectangle with Shapes.AddAutoShape(), then attach text via shape.AddTextFrame() and set font properties on PortionFormat:

using Aspose.Slides.Foss;
using Aspose.Slides.Foss.Export;

using var prs = new Presentation();
var slide = prs.Slides[0];
var shape = slide.Shapes.AddAutoShape(ShapeType.Rectangle, 50, 50, 400, 150);
var tf = shape.AddTextFrame("Hello from Aspose.Slides FOSS!");
var fmt = tf.Paragraphs[0].Portions[0].PortionFormat;
fmt.FontHeight = 24;
fmt.FontBold = NullableBool.True;
prs.Save("with_shape.pptx", SaveFormat.Pptx);

Apply a Solid Fill

Set FillFormat.FillType = FillType.Solid on the shape and supply an ARGB color via Color.FromArgb(). The fill is written to the .pptx file when Save() is called:

using Aspose.Slides.Foss;
using Aspose.Slides.Foss.Drawing;
using Aspose.Slides.Foss.Export;

using var prs = new Presentation();
var shape = prs.Slides[0].Shapes.AddAutoShape(ShapeType.Rectangle, 100, 100, 400, 200);
shape.FillFormat.FillType = FillType.Solid;
shape.FillFormat.SolidFillColor.Color = Color.FromArgb(255, 70, 130, 180);
shape.AddTextFrame("Styled shape");
prs.Save("styled.pptx", SaveFormat.Pptx);

Load an Existing File

Pass a file path to the Presentation constructor to open an existing .pptx file. Read the slide count, modify the deck as needed, then call Save() to write the output:

using Aspose.Slides.Foss;
using Aspose.Slides.Foss.Export;

using var prs = new Presentation("existing.pptx");
Console.WriteLine($"Slides: {prs.Slides.Count}");
prs.Save("copy.pptx", SaveFormat.Pptx);

Next Steps