Convert PowerPoint to Image in ASP.NET Core

17 Feb 20257 minutes to read

Syncfusion^® PowerPoint is a .NET Core PowerPoint library used to create, read, edit and convert PowerPoint presentation programmatically without Microsoft PowerPoint or interop dependencies. Using this library, you can convert a PowerPoint to image in ASP.NET Core.

Steps to convert PowerPoint to Image programmatically

• Visual Studio
• Visual Studio Code
• JetBrains Rider

Prerequisites:

• Visual Studio 2022.
• Install .NET 8 SDK or later.

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

Step 2: Install the Syncfusion.PresentationRenderer.Net.Core NuGet package as reference to your .NET Standard applications from NuGet.org.

Prerequisites:

• Visual Studio Code.
• Install .NET 8 SDK or later.
• Open Visual Studio Code and install the C# for Visual Studio Code extension from the Extensions Marketplace.

Step 1: Create a new ASP.NET Core Web application project.

• Open the command palette by pressing Ctrl+Shift+P and type .NET:New Project and enter.
• Choose the ASP.NET Core Web App( Model-View-Controller) MVC template.

• Select the project location, type the project name and press enter.
• Then choose Create project.

Step 2: To convert a PowerPoint document to image in ASP.NET Core Web app, install Syncfusion.PresentationRenderer.Net.Core to the ASP.NET Core project.

• Press Ctrl + ` (backtick) to open the integrated terminal in Visual Studio Code.
• Ensure you’re in the project root directory where your .csproj file is located.
• Run the command dotnet add package Syncfusion.PresentationRenderer.Net.Core to install the NuGet package.

NOTE

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 3: Include the following namespaces in HomeController.cs.

C#

using Syncfusion.Presentation;
using Syncfusion.PresentationRenderer;

Step 4: A default action method named Index will be present in HomeController.cs. Right click on Index method and select Go To View where you will be directed to its associated view page Index.cshtml.

Step 5: Add a new button in the Index.cshtml as shown below.

HTML

@{
    Html.BeginForm("ConvertPPTXtoImage", "Home", FormMethod.Get);
    {
        <div>
            <input type="submit" value="Convert PPTX to Image" style="width:200px;height:27px" />
        </div>
    }
    Html.EndForm();
}

Step 6: Add a new action method ConvertPPTXtoImage in HomeController.cs and include the below code snippet to convert a PowerPoint to image in ASP.NET Core.

C#

//Open the file as Stream.
using (FileStream fileStream = new FileStream(Data/Input.pptx", FileMode.Open, FileAccess.Read))
{
    //Open the existing PowerPoint presentation.
    using (IPresentation pptxDoc = Presentation.Open(fileStream))
    {
        //Initialize the PresentationRenderer to perform image conversion.
        pptxDoc.PresentationRenderer = new PresentationRenderer();
        //Convert PowerPoint slide to image as stream.
        Stream stream = pptxDoc.Slides[0].ConvertToImage(ExportImageFormat.Jpeg);
        //Reset the stream position.
        stream.Position = 0;
        //Download image in the browser.
        return File(stream, "application/jpeg", "PPTXtoImage.Jpeg");
    }
}

Step 7: Build the project.

Run the following command in terminal to build the project.

dotnet build

Step 8: Run the project.

Run the following command in terminal to run the project.

dotnet run

You can download a complete working sample from GitHub.

By executing the program, you will get the image as follows.

Prerequisites:

• JetBrains Rider.
• Install .NET 8 SDK or later.

Step 1. Open JetBrains Rider and create a new ASP.NET Core Web application project.

• Launch JetBrains Rider.
• Click new solution on the welcome screen.

• In the new Solution dialog, select Project Type as Web.
• Select the target framework (e.g., .NET 8.0, .NET 9.0) and template as Web App(Model-View-Controller).
• Enter a project name and specify the location.
• Click create.

Step 2: Install the NuGet package from NuGet.org.

• Click the NuGet icon in the Rider toolbar and type Syncfusion.PresentationRenderer.Net.Core in the search bar.
• Ensure that “nuget.org” is selected as the package source.
• Select the latest Syncfusion.PresentationRenderer.Net.Core NuGet package from the list.
• Click the + (Add) button to add the package.

• Click the Install button to complete the installation.

NOTE

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 3: Include the following namespaces in HomeController.cs.

C#

using Syncfusion.Presentation;
using Syncfusion.PresentationRenderer;

Step 4: A default action method named Index will be present in HomeController.cs. Right click on Index method and select Go To View where you will be directed to its associated view page Index.cshtml.

Step 5: Add a new button in the Index.cshtml as shown below.

HTML

@{
    Html.BeginForm("ConvertPPTXtoImage", "Home", FormMethod.Get);
    {
        <div>
            <input type="submit" value="Convert PPTX to Image" style="width:200px;height:27px" />
        </div>
    }
    Html.EndForm();
}

Step 6: Add a new action method ConvertPPTXtoImage in HomeController.cs and include the below code snippet to convert a PowerPoint to image in ASP.NET Core.

C#

//Open the file as Stream.
using (FileStream fileStream = new FileStream(Data/Input.pptx", FileMode.Open, FileAccess.Read))
{
    //Open the existing PowerPoint presentation.
    using (IPresentation pptxDoc = Presentation.Open(fileStream))
    {
        //Initialize the PresentationRenderer to perform image conversion.
        pptxDoc.PresentationRenderer = new PresentationRenderer();
        //Convert PowerPoint slide to image as stream.
        Stream stream = pptxDoc.Slides[0].ConvertToImage(ExportImageFormat.Jpeg);
        //Reset the stream position.
        stream.Position = 0;
        //Download image in the browser.
        return File(stream, "application/jpeg", "PPTXtoImage.Jpeg");
    }
}

Step 7: Build the project.

Click the Build button in the toolbar or press Ctrl+Shift+B to build the project.

Step 8: Run the project.

Click the Run button (green arrow) in the toolbar or press F5 to run the app.

You can download a complete working sample from GitHub.

By executing the program, you will get the image as follows.

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

An online sample link to convert PowerPoint Presentation to image in ASP.NET Core.