Create, read and edit a PowerPoint file in ASP.NET Core

7 Aug 20236 minutes to read

You can create or edit a PowerPoint file with the Syncfusion ASP.NET Core PowerPoint library. The below are the steps.

To quickly get started with creating a PowerPoint file in ASP.NET Core, check this video:

Create a PowerPoint file in ASP.NET Core

Step 1: Create a new C# ASP.NET Core web application project.

Create ASP.NET Core Web project for PowerPoint file

Step 2: Select Web Application pattern (Model-View-Controller) for the project.

Select Web Application pattern for PowerPoint file

Step 3: Install the Syncfusion.Presentation.Net.Core NuGet package as reference to your .NET Standard applications from

Install Presentation .Net Core Nuget


Starting with v16.2.0.x, if you reference Syncfusion assemblies from trial setup or from the NuGet feed, you also have to add “Syncfusion.Licensing” assembly reference and include a license key in your projects. Please refer to this link to know about registering Syncfusion license key in your application to use our components.

Step 4: After installing the Syncfusion.Presentation.Net.Core nuget package, the following assemblies were included in our project.

  • Syncfusion.Compression.Net.Core
  • Syncfusion.Licensing
  • Syncfusion.OfficeChart.Net.Core
  • Syncfusion.Presentation.Portable

Installed Assemblies in Presentation ASP.NET Core

Step 5: The below code snippets demonstrate how to create a PowerPoint Presentation in ASP.NET Core platform.

Create Presentation instance:

//Create a new instance of PowerPoint Presentation file
IPresentation pptxDoc = Presentation.Create();

Add a new slide

//Add a new slide to file and apply background color
ISlide slide = pptxDoc.Slides.Add(SlideLayoutType.TitleOnly);

Apply Background

//Specify the fill type and fill color for the slide background 
slide.Background.Fill.FillType = FillType.Solid;
slide.Background.Fill.SolidFill.Color = ColorObject.FromArgb(232, 241, 229);

Add title content:

//Add title content to the slide by accessing the title placeholder of the TitleOnly layout-slide
IShape titleShape = slide.Shapes[0] as IShape;
titleShape.TextBody.AddParagraph("Company History").HorizontalAlignment = HorizontalAlignmentType.Center;

Add description content:

//Add description content to the slide by adding a new TextBox
IShape descriptionShape = slide.AddTextBox(53.22, 141.73, 874.19, 77.70);
descriptionShape.TextBody.Text = "IMN Solutions PVT LTD is the software company, established in 1987, by George Milton. The company has been listed as the trusted partner for many high-profile organizations since 1988 and got awards for quality products from reputed organizations.";

Add bullet points:

//Add bullet points to the slide
IShape bulletPointsShape = slide.AddTextBox(53.22, 270, 437.90, 116.32);
//Add a paragraph for a bullet point
IParagraph firstPara = bulletPointsShape.TextBody.AddParagraph("The company acquired the MCY corporation for 20 billion dollars and became the top revenue maker for the year 2015.");
//Format how the bullets should be displayed
firstPara.ListFormat.Type = ListType.Bulleted;
firstPara.LeftIndent = 35;
firstPara.FirstLineIndent = -35;
// Add another paragraph for the next bullet point
IParagraph secondPara = bulletPointsShape.TextBody.AddParagraph("The company is participating in top open source projects in automation industry.");
//Format how the bullets should be displayed
secondPara.ListFormat.Type = ListType.Bulleted;
secondPara.LeftIndent = 35;
secondPara.FirstLineIndent = -35;

Add an image:

//Gets a picture as stream.
FileStream pictureStream = new FileStream("Image.jpg", FileMode.Open);
//Adds the picture to a slide by specifying its size and position.
slide.Shapes.AddPicture(pictureStream, 499.79, 238.59, 364.54, 192.16);

You can download the image used in the sample from here.

Add a shape:

//Add an auto-shape to the slide
IShape stampShape = slide.Shapes.AddShape(AutoShapeType.Explosion1, 48.93, 430.71, 104.13, 80.54);
//Format the auto-shape color by setting the fill type and text
stampShape.Fill.FillType = FillType.None;
stampShape.TextBody.AddParagraph("IMN").HorizontalAlignment = HorizontalAlignmentType.Center;

Save and close the presentation:

//Save the PowerPoint Presentation as stream
FileStream outputStream = new FileStream("Sample.pptx", FileMode.Create);
//Release all resources from stream
//Close the PowerPoint presentation

You can download a complete working sample from GitHub.

The output of the above code example will generate the below PowerPoint slide.

ASP.Net Core PowerPoint Library Output

Read and edit a PowerPoint file in ASP.NET Core

You can edit an existing PowerPoint file using this library. The below code snippet demonstrates accessing a shape from a slide and changing the text within it.

//Open an existing PowerPoint presentation
IPresentation pptxDoc = Presentation.Open(new FileStream("Sample.pptx",FileMode.Open));
//Gets the first slide from the PowerPoint presentation
ISlide slide = pptxDoc.Slides[0];
//Gets the first shape of the slide
IShape shape = slide.Shapes[0] as IShape;
//Change the text of the shape
if(shape.TextBody.Text == "Company History")
    shape.TextBody.Text = "Company Profile";
//Save the PowerPoint presentation as stream
FileStream outputStream = new FileStream("Output.pptx", FileMode.Create);
outputStream.Position = 0;
//Close the PowerPoint presentation

You can download a complete working sample from GitHub.

Click here to explore the rich set of Syncfusion PowerPoint Library (Presentation) features.

An online sample link to create a PowerPoint Presentation in ASP.NET Core.