Open and save Presentation in ASP.NET Core

4 Feb 20253 minutes to read

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

Steps to open and save PowerPoint Presentation programmatically

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

Create ASP.NET Core Web project for PowerPoint file

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

Install Syncfusion.Presentation.Net.Core 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.

using Syncfusion.Presentation;

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.BeginForm("OpenAndSavePresentation", "Home", FormMethod.Get);
    {
        <div>
            <input type="submit" value="Open and Save Presentation" style="width:150px;height:27px" />
        </div>
    }
    Html.EndForm();
}

Step 6: Add a new action method OpenAndSavePresentation in HomeController.cs and include the below code snippet to open an existing Presentation in ASP.NET Core.

FileStream fileStreamPath = new(Path.GetFullPath(@"Data/Template.pptx"), FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
//Open an existing PowerPoint presentation.
IPresentation pptxDoc = Presentation.Open(fileStreamPath);

Step 7: Add below code snippet demonstrates accessing a shape from a slide and changing the text within it.

//Get the first slide from the PowerPoint presentation.
ISlide slide = pptxDoc.Slides[0];
//Get 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";

Step 8: Add below code example to save the PowerPoint Presentation in ASP.NET Core.

//Save the PowerPoint Presentation as stream.
MemoryStream pptxStream = new();
pptxDoc.Save(pptxStream);
pptxStream.Position = 0;
//Download Powerpoint document in the browser.
return File(pptxStream, "application/powerpoint", "Result.pptx");

You can download a complete working sample from GitHub

By executing the program, you will get the PowerPoint document as follows.

ASP.Net Core output PowerPoint document

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