C#/VB.NET - Convert Images to a PowerPoint File

Creating a PowerPoint presentation from a set of images is one requirement that you may have at work. As an example, your company’s designer created a series of beautiful product flyers, and you may need to convert these pictures into PowerPoint in order to display them more effectively. By doing so, you do not need to create a PowerPoint document from scratch and save a lot of time. In this article, I am going to introduce how to convert images (JPG, JPEG, PNG, etc.) to PowerPoint presentations in C# and VB.NET using Spire.Presentation for .NET library.

Install Spire.Presentation for .NET

Method #1: Download Spire.Presentation and unzip the package somewhere on your disk to find the “BIN” folder. Spire.Presentation has the DLLs compiled for multiple versions of .NET Framework as well as for .NET Core and other platforms. Choose the DLLs from the folder that you exactly need and add them all as dependencies in your project.

Method #2: Create a .NET application in you Visual Studio, and install Spire.Presentation directly through NuGet. NuGet package manager will automatically install the correct version that fits in with your application.

Convert Images to a PowerPoint File in C# and VB.NET

The following are the steps to convert a group of images to a PowerPoint document using Spire.Presentation for .NET.

• Create a Presentation object.
• Set the slide size type to Screen 16x9.
• Get the image paths from a folder and store in a string array.
• Traverse all items in the array.
• Add a slide to the presentation using Presnetation.Slides.Add() method.
• Get a specific image from the string array and append it the image collection of the presentation using Presentation.Images.Append() method.
• Set the image as the background image of the slide.
• Save the presentation to a PowerPoint file using Presentation.SaveToFile() method.

[C#]

using System.Drawing;
using System.IO;
using Spire.Presentation;
using Spire.Presentation.Drawing;
namespace ConvertImagesToPptx
{
    class Program
    {
        static void Main(string[] args)
        {
            //Create a Presentation object
            Presentation presentation = new Presentation();
            //Set slide size type
            presentation.SlideSize.Type = SlideSizeType.Screen16x9;
            //Remove the default slide
            presentation.Slides.RemoveAt(0);
            //Get image file paths and store in a string array
            string[] picFiles = Directory.GetFiles(@"C:\Users\Administrator\Desktop\Images");
            //Loop through the images 
            for (int i = 0; i < picFiles.Length; i++)
            {
                //Add a slide
                ISlide slide = presentation.Slides.Append();
                //Get a specific image 
                string imageFile = picFiles[i]; 
                Image image = Image.FromFile(imageFile);
                //Append it to the image collection 
                IImageData imageData = presentation.Images.Append(image);
                //Set the image as the background image of the slide
                slide.SlideBackground.Type = BackgroundType.Custom;
                slide.SlideBackground.Fill.FillType = FillFormatType.Picture;
                slide.SlideBackground.Fill.PictureFill.FillType = PictureFillType.Stretch;
                slide.SlideBackground.Fill.PictureFill.Picture.EmbedImage = imageData;           
            }
            //Save to file
            presentation.SaveToFile("ImagesToPowerPoint.pptx",FileFormat.Pptx2013);
        }
    }
}

[VB.NET]

Imports System.Drawing
Imports System.IO
Imports Spire.Presentation
Imports Spire.Presentation.Drawing
 
Namespace ConvertImagesToPptx
    Class Program
        Shared  Sub Main(ByVal args() As String)
            'Create a Presentation object
            Dim presentation As Presentation =  New Presentation() 
 
            'Set slide size type
            presentation.SlideSize.Type = SlideSizeType.Screen16x9
 
            'Revemo the default slide
            presentation.Slides.RemoveAt(0)
 
            'Get file paths in a string array
            Dim picFiles() As String =  Directory.GetFiles("C:\Users\Administrator\Desktop\Images") 
 
            'Loop through the images 
            Dim i As Integer
            For  i = 0 To  picFiles.Length- 1  Step  i + 1
                'Add a slide
                Dim slide As ISlide =  presentation.Slides.Append() 
 
                'Get a specific image 
                Dim imageFile As String =  picFiles(i) 
                Dim image As Image =  Image.FromFile(imageFile) 
 
                'Append it to the image collection 
                Dim imageData As IImageData =  presentation.Images.Append(image) 
 
                'Set the image as the background image of the slide
                slide.SlideBackground.Type = BackgroundType.Custom
                slide.SlideBackground.Fill.FillType = FillFormatType.Picture
                slide.SlideBackground.Fill.PictureFill.FillType = PictureFillType.Stretch
                slide.SlideBackground.Fill.PictureFill.Picture.EmbedImage = imageData
            Next
 
            'Save to file
            presentation.SaveToFile("ImagesToPowerPoint.pptx",FileFormat.Pptx2013)
            System.Diagnostics.Process.Start("ImagesToPowerPoint.pptx")
        End Sub
    End Class
End Namespace

Output