OfficeIMO.PowerPoint 3.6.0

OfficeIMO.PowerPoint

Create, edit, read and save PowerPoint presentations (.pptx, and PowerPoint 97–2003 .ppt, .pot and .pps) in .NET, without Microsoft PowerPoint or COM. Slides, tables and charts are native PowerPoint objects that stay editable.

Install

dotnet add package OfficeIMO.PowerPoint
dotnet add package OfficeIMO.PowerPoint.Pdf   # only for SaveAsPdf

Targets netstandard2.0, net8.0 and net10.0, plus net472 on Windows.

Create a deck

Positions and sizes are OfficeLength values. SlideSize.GetContentBox gives the area inside a margin, and a PowerPointLayoutBox splits it into rows, columns or a title band, so slides line up without hand-computed coordinates:

using OfficeIMO;
using OfficeIMO.PowerPoint;

using var deck = PowerPointDocument.Create("Review.pptx");
PowerPointLayoutBox page = deck.SlideSize.GetContentBox(OfficeLength.Centimeters(1.5));
PowerPointLayoutBox titleBand = page.TakeTop(OfficeLength.Centimeters(2.5));
PowerPointLayoutBox body = page.Inset(OfficeLength.Zero, OfficeLength.Centimeters(3.5), OfficeLength.Zero, OfficeLength.Zero);

deck.AddSlide().AddTitle("Quarterly business review", titleBand);

PowerPointSlide agenda = deck.AddSlide();
agenda.AddTitle("Agenda", titleBand);
agenda.AddTextBox(body).AddBullets(["Results", "Risks", "Decisions", "Next steps"]);
agenda.Notes.Text = "Keep the agenda under two minutes.";

deck.Save();

Create starts with no slides; each AddSlide() adds one.

Tables and charts from your data

AddTable and AddChart take any IEnumerable<T>, the same way as in Word and Excel, and return the native table or chart:

using OfficeIMO;
using OfficeIMO.PowerPoint;

Region[] regions = [new("North", 5.7m, 0.36), new("South", 4.1m, 0.31), new("West", 2.9m, 0.27)];

using var deck = PowerPointDocument.Create("Regions.pptx");
PowerPointLayoutBox page = deck.SlideSize.GetContentBox(OfficeLength.Centimeters(1.5));
PowerPointLayoutBox titleBand = page.TakeTop(OfficeLength.Centimeters(2.5));
PowerPointLayoutBox[] halves = page.Inset(OfficeLength.Zero, OfficeLength.Centimeters(3.5), OfficeLength.Zero, OfficeLength.Zero)
    .SplitColumns(2, OfficeLength.Centimeters(1));

PowerPointSlide slide = deck.AddSlide();
slide.AddTitle("Revenue by region", titleBand);

PowerPointTable table = slide.AddTable(regions);
halves[0].ApplyTo(table);

slide.AddChart(OfficeChartType.Column, regions, nameof(Region.Name), new PowerPointChartOptions {
    Title = "Revenue (USD m)",
    Left = halves[1].Left, Top = halves[1].Top, Width = halves[1].Width, Height = halves[1].Height
}, nameof(Region.Revenue));

deck.Save();

record Region(string Name, decimal Revenue, double Margin);

Images

using OfficeIMO;
using OfficeIMO.PowerPoint;

using var deck = PowerPointDocument.Create("Logo.pptx");
PowerPointSlide slide = deck.AddSlide();
slide.AddTitle("Northwind Traders");
slide.AddImage("logo.png", left: OfficeLength.Centimeters(2), top: OfficeLength.Centimeters(5),
    width: OfficeLength.Centimeters(6), height: OfficeLength.Centimeters(6));
deck.Save();

Edit an existing deck

using OfficeIMO.PowerPoint;

using var deck = PowerPointDocument.Load("Review.pptx");
int replaced = deck.ReplaceAll("Quarterly", "Annual", new PowerPointTextSearchOptions { IncludeNotes = true });
foreach (PowerPointSlide slide in deck.Slides) {
    Console.WriteLine(slide.Notes.Text);
}
deck.Save("Review-annual.pptx");

ReplaceAll matches ordinally and ignores case by default, like Word and PDF; set MatchCase or WholeWords on the options to change that. Textbox and table matches lie within one text run, so a word split across differently formatted runs is not replaced. Tables are included by default and speaker notes only with IncludeNotes.

For files from outside your organization, load with PowerPointLoadOptions.UntrustedDefaults, which rejects macros, embedded objects, ActiveX and external relationships before parsing.

Save as PDF or images

using OfficeIMO;
using OfficeIMO.PowerPoint;
using OfficeIMO.PowerPoint.Pdf;

using var deck = PowerPointDocument.Load("Regions.pptx");
OfficeConversionReport pdf = deck.SaveAsPdf("Regions.pdf");
Console.WriteLine($"{pdf.ItemsWritten} slides, loss: {pdf.HasLoss}");

File.WriteAllBytes("Regions-1.png", deck.Slides[0].ToImage());

More

• PowerPoint guide: text and paragraph formatting, shapes, the full chart API, designer composition and deck plans, corporate templates, sections, transitions, review threads, SmartArt, accessibility checks, legacy .ppt and image export.
• Generated operation contract: exactly what is supported, preserved or rejected.
• Adapters: OfficeIMO.PowerPoint.Pdf, Html, OpenDocument, GoogleSlides and IWork. PDF back to PowerPoint lives in OfficeIMO.Pdf.PowerPoint.
• Examples and the migration guide. PowerPointPresentation is now PowerPointDocument.
• PowerShell: PSWriteOffice (New-OfficePowerPoint, Export-OfficePowerPoint).

Dependencies: the Open XML SDK and OfficeIMO.Core. MIT licensed.

Generated capability summary

This table is generated from the package-neutral OfficeIMO operation catalog. The detailed source contracts remain authoritative for feature-level behavior and limitations.

The complete rows for OfficeIMO.PowerPoint are published in the generated operation contract.