TL;DR: Let’s see how to convert PowerPoint slides into images using Syncfusion’s .NET PowerPoint Library in C#. This guide covers converting entire presentations, individual slides, and slide ranges into images with just a few lines of code.
PowerPoint presentations are an effective tool for sharing information, but many scenarios exist where converting slides into images can be highly beneficial. Whether embedding slides into websites, creating static previews, or sharing slide content as images for better accessibility, this process can be accomplished effortlessly using the Syncfusion PowerPoint Library in C#.
This guide will demonstrate how to programmatically convert PowerPoint slides into images using Syncfusion .NET PowerPoint Library (Presentation). With just a few lines of code, you can seamlessly convert presentations into images without requiring Microsoft PowerPoint or any interop dependencies.
This PowerPoint-to-image conversion is available in multiple environments, such as:
Let’s get started with the implementation!
Step 1: First, create a new C# .NET Core Console App in Visual Studio.
using Syncfusion.Presentation; using Syncfusion.PresentationRenderer;
Now, your project is ready to start converting PowerPoint slides into images.
Converting an entire PowerPoint presentation into images is beneficial for creating slide previews or exporting slides as standalone image files for offline sharing. The RenderAsImages method helps us to process all slides in a presentation, converting each into an image.
Refer to the following code example.
// Open the file as Stream.
using (FileStream fileStream = new FileStream(Path.GetFullPath("Template.pptx"), FileMode.Open, FileAccess.Read))
{
// Load an existing PowerPoint presentation.
using (IPresentation pptxDoc = Presentation.Open(fileStream))
{
// Initialize PresentationRenderer.
pptxDoc.PresentationRenderer = new PresentationRenderer();
// Convert PowerPoint to images.
Stream[] images = pptxDoc.RenderAsImages(ExportImageFormat.Jpeg);
// Save the images to a file.
for (int i = 0; i < images.Length; i++)
{
using (Stream stream = images[i])
{
using (FileStream fileStreamOutput = File.Create(Path.GetFullPath("Image-" + i + ".jpg")))
{
stream.CopyTo(fileStreamOutput);
}
}
}
}
} By executing this code example, we will get the output like in the following screenshot.
Converting a single slide to an image is ideal for scenarios where you need to highlight or share a specific slide, such as creating a featured thumbnail or sharing a key slide on social media. You can use the RenderAsImage method to convert just one slide from a presentation into an image.
Refer to the following code example.
// Open the file as Stream.
using (FileStream inputStream = new FileStream(Path.GetFullPath("Template.pptx"), FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
// Load an existing PowerPoint presentation.
using (IPresentation pptxDoc = Presentation.Open(inputStream))
{
// Initialize PresentationRenderer.
pptxDoc.PresentationRenderer = new PresentationRenderer();
// Convert the first slide of the PowerPoint to an image.
using (Stream stream = pptxDoc.Slides[0].ConvertToImage(ExportImageFormat.Jpeg))
{
// Save the image stream to a file.
using (FileStream fileStreamOutput = File.Create(Path.GetFullPath("Image.jpg")))
{
stream.CopyTo(fileStreamOutput);
}
}
}
} By executing this code example, we will get the output like in the following screenshot.
Converting a range of slides to images helps generate previews for selected slides, share a subset of slides, or export only the most relevant presentation sections. You can iterate over a specific range of slides and convert them into images using the RenderAsImage method.
Refer to the following code example.
// Open the file as Stream.
using (FileStream inputStream = new FileStream(Path.GetFullPath("Template.pptx"), FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
// Load an existing PowerPoint presentation.
using (IPresentation pptxDoc = Presentation.Open(inputStream))
{
// Initialize PresentationRenderer.
pptxDoc.PresentationRenderer = new PresentationRenderer();
// Loop through a specific range of slides and convert each to an image.
for (int currentSlideIndex = 2; currentSlideIndex < pptxDoc.Slides.Count - 1; currentSlideIndex++)
{
using (Stream stream = pptxDoc.Slides[currentSlideIndex].ConvertToImage(ExportImageFormat.Jpeg))
{
// Save the image stream to a file.
using (FileStream fileStreamOutput = File.Create(Path.GetFullPath("Image_" + currentSlideIndex + ".jpeg")))
{
stream.CopyTo(fileStreamOutput);
}
}
}
}
} For more details, refer to converting PowerPoint to images using C# GitHUb demo.
Thanks for reading! We’ve seen how to convert PowerPoint into images easily using the Syncfusion .NET PowerPoint Library. Take a moment to peruse the documentation, where you’ll find other options and features, all with accompanying code examples.
Apart from this PowerPoint-to-image conversion functionality, our .NET PowerPoint Library has the following significant functionalities and many more:
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