Create PowerPoint document in Blazor
19 Sep 202320 minutes to read
Syncfusion Essential PowerPoint is a .NET Core PowerPoint library used to create, read, and edit PowerPoint documents programmatically without Microsoft PowerPoint or interop dependencies. Using this library, you can create a PowerPoint document in Blazor.
Prerequisites
- Visual Studio 2019 Preview
- Install .NET Core SDK 3.1
Creating a Blazor project
- Enable Visual Studio to use preview SDKs
- Open Tools > Options in the menu bar.
- Open the Projects and Solutions node. Open the .NET Core tab.
- Check the box for Use previews of the .NET Core SDK and click OK.
- Restart the Visual Studio 2019.
Server app
Step 1: Create a new C# Blazor Server app project. Select Blazor App from the template and click the Next button.
Step 2: Now, the project configuration window will popup. Click Create button to create a new project with the required project name.
Step 3: Choose Blazor Server App and click Create button to create a new Blazor Server app for .NET Core 3.0.0-preview9.
Step 4: To create a PowerPoint document in Server app, install Syncfusion.Presentation.Net.Core to the Blazor project.
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 5: Create a razor file with name as Presentation under Pages folder and include the following namespaces in the file.
@page "/Presentation"
@using System.IO;
@using ServerSideApplication;
@inject ServerSideApplication.Data.PresentationService service
@inject Microsoft.JSInterop.IJSRuntime JSStep 6: Add the following code to create a new button.
<h2>Syncfusion Presentation library (Essential Presentation)</h2>
<p>Syncfusion Blazor Presentation library (Essential Presentation) used to create, read, edit, and convert Presentation files in your applications without Microsoft Office dependencies.</p>
<button class="btn btn-primary" @onclick="@CreatePowerPoint">Create PowerPoint</button>Step 7: Add the following code in Presentation.razor file to create and download the Presentation document.
@code {
MemoryStream documentStream;
/// <summary>
/// Create and download the Presentation document
/// </summary>
protected async void CreatePowerPoint()
{
documentStream = service.CreatePowerPoint();
await JS.SaveAs("Sample.pptx", documentStream.ToArray());
}
}Step 8: Create a new cs file with name as PresentationService under Data folder and include the following namespaces in the file.
@using Syncfusion.Presentation;
@using Syncfusion.OfficeChart;
@using System.IO;Step 9: Create a new MemoryStream method with name as CreatePowerPoint and include the following code snippet to create a PowerPoint document in Blazor Server app.
public MemoryStream CreatePowerPoint()
{
//Create a new instance of PowerPoint Presentation file
IPresentation pptxDoc = Presentation.Create();
//Add a new slide to file and apply background color
ISlide slide = pptxDoc.Slides.Add(SlideLayoutType.TitleOnly);
//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 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 to the slide by adding a new TextBox IShape
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 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 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 the PowerPoint Presentation as stream
MemoryStream stream = new MemoryStream();
pptxDoc.Save(stream);
//Close the PowerPoint Presentation as stream
pptxDoc.Close();
stream.Position = 0;
//Download the PowerPoint document in the browser
JS.SaveAs("Sample.pptx", stream.ToArray());
}Step 10: Create a new class file in the project, with name as FileUtils and add the following code to invoke the JavaScript action to download the file in the browser.
public static class FileUtils
{
public static ValueTask<object> SaveAs(this IJSRuntime js, string filename, byte[] data)
=> js.InvokeAsync<object>(
"saveAsFile",
filename,
Convert.ToBase64String(data));
}Step 11: Add the following JavaScript function in the _Host.cshtml in the Pages folder.
<script type="text/javascript">
function saveAsFile(filename, bytesBase64) {
if (navigator.msSaveBlob)
{
//Download document in Edge browser
var data = window.atob(bytesBase64);
var bytes = new Uint8Array(data.length);
for (var i = 0; i < data.length; i++)
{
bytes[i] = data.charCodeAt(i);
}
var blob = new Blob([bytes.buffer], { type: "application/octet-stream" });
navigator.msSaveBlob(blob, filename);
}
else
{
var link = document.createElement('a');
link.download = filename;
link.href = "data:application/octet-stream;base64," + bytesBase64;
document.body.appendChild(link); // Needed for Firefox
link.click();
document.body.removeChild(link);
}
}
</script>You can download a complete working sample from GitHub.
By executing the program, you will get the PowerPoint document as follows.
Click here to explore the rich set of Syncfusion PowerPoint Library (Presentation) features.
An online sample link to create a PowerPoint Presentation in Blazor.
WASM app
Step 1: Create a new C# Blazor WASM app project. Select Blazor App from the template and click the Next button.
Step 2: Now, the project configuration window will popup. Click Create button to create a new project with the required project name.
Step 3: Choose Blazor WebAssembly App and click Create button to create a new Blazor WASM app for .NET Core 3.0.0-preview9.
Step 4: To create a PowerPoint document in WASM app, install Syncfusion.Presentation.Net.Core to the Blazor project.
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 5: Create a razor file with name as Presentation under Pages folder and add the following namespaces in the file.
@page "/Presentation"
@using Syncfusion.Presentation
@using Syncfusion.OfficeChart
@using System.IO
@inject Microsoft.JSInterop.IJSRuntime JSStep 6: Add the following code to create a new button.
<h2>Syncfusion Presentation library (Essential Presentation)</h2>
<p>Syncfusion Blazor Presentation library (Essential Presentation) used to create, read, edit, and convert Presentation files in your applications without Microsoft Office dependencies.</p>
<button class="btn btn-primary" @onclick="@CreatePowerPoint">Create PowerPoint</button>Step 7: Create a new async method with name as CreatePowerPoint and include the following code snippet to create a PowerPoint document in Blazor WASM app.
@functions {
async void CreatePowerPoint()
{
//Create a new instance of PowerPoint Presentation file
IPresentation pptxDoc = Presentation.Create();
//Add a new slide to file and apply background color
ISlide slide = pptxDoc.Slides.Add(SlideLayoutType.TitleOnly);
//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 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 to the slide by adding a new TextBox IShape
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 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 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 the PowerPoint Presentation as stream
MemoryStream stream = new MemoryStream();
pptxDoc.Save(stream);
//Close the PowerPoint Presentation as stream
pptxDoc.Close();
stream.Position = 0;
//Download the PowerPoint document in the browser
JS.SaveAs("Sample.pptx", stream.ToArray());
}
}Step 8: To download the PowerPoint document in browser, create a class file with FileUtils name and add the following code to invoke the JavaScript action to download the file in the browser.
public static class FileUtils
{
public static ValueTask<object> SaveAs(this IJSRuntime js, string filename, byte[] data)
=> js.InvokeAsync<object>(
"saveAsFile",
filename,
Convert.ToBase64String(data));
}Step 9: Add the following JavaScript function in the _Host.cshtml in the Pages folder.
<script type="text/javascript">
function saveAsFile(filename, bytesBase64) {
if (navigator.msSaveBlob) {
//Download document in Edge browser
var data = window.atob(bytesBase64);
var bytes = new Uint8Array(data.length);
for (var i = 0; i < data.length; i++) {
bytes[i] = data.charCodeAt(i);
}
var blob = new Blob([bytes.buffer], { type: "application/octet-stream" });
navigator.msSaveBlob(blob, filename);
}
else {
var link = document.createElement('a');
link.download = filename;
link.href = "data:application/octet-stream;base64," + bytesBase64;
document.body.appendChild(link); // Needed for Firefox
link.click();
document.body.removeChild(link);
}
}
</script>You can download a complete working sample from GitHub.
By executing the program, you will get the PowerPoint document as follows.
NOTE
Even though PowerPoint library works in WASM app, it is recommended to use server deployment. Since the WASM app deployment increases the application payload size. You can also explore our Blazor PowerPoint library demo that shows how to create and modify PowerPoint files from C# with just five lines of code.
Kindly explore the supported and unsupported features of PowerPoint library in Blazor.
Click here to explore the rich set of Syncfusion PowerPoint Library (Presentation) features.
An online sample link to create a PowerPoint Presentation in Blazor.