Create PowerPoint (PPTX) or PDF in Docker container
GemBox.Presentation can be used inside docker containers that are running .NET Docker images.
To use Docker, you must first install Docker Desktop. After that, you can containerize your .NET application.

The following is a project file for the .NET Core application with added Docker support.
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net7.0</TargetFramework>
<DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
<DockerfileContext>.</DockerfileContext>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="GemBox.Presentation" Version="*" />
<PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.17.0" />
<PackageReference Include="HarfBuzzSharp.NativeAssets.Linux" Version="*" />
<PackageReference Include="SkiaSharp.NativeAssets.Linux" Version="*" />
</ItemGroup>
</Project>
To configure or customize a Docker image, you'll need to edit the Dockerfile.
When creating PDF files, the font files need to be present in the container. The official Linux images for .NET won't have any fonts installed. So, you'll need to copy the necessary font files to the Linux container, or install a font package like ttf-mscorefonts-installer, or add them as Private Fonts.
The following example shows how you can create PPTX and PDF files from Docker containers and configure Docker images with Dockerfile.

FROM mcr.microsoft.com/dotnet/runtime:7.0 AS base
WORKDIR /app
FROM mcr.microsoft.com/dotnet/sdk:7.0 AS build
WORKDIR /src
COPY ["PresentationDocker.csproj", ""]
RUN dotnet restore "./PresentationDocker.csproj"
COPY . .
WORKDIR "/src/."
RUN dotnet build "PresentationDocker.csproj" -c Release -o /app/build
FROM build AS publish
RUN dotnet publish "PresentationDocker.csproj" -c Release -o /app/publish
FROM base AS final
# Update package sources to include supplemental packages (contrib archive area).
RUN sed -i 's/main/main contrib/g' /etc/apt/sources.list
# Downloads the package lists from the repositories.
RUN apt-get update
# Install font configuration.
RUN apt-get install -y fontconfig
# Install Microsoft TrueType core fonts.
RUN apt-get install -y ttf-mscorefonts-installer
# Or install Liberation TrueType fonts.
# RUN apt-get install -y fonts-liberation
# Or some other font package...
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "PresentationDocker.dll"]
using System.IO;
using GemBox.Presentation;
class Program
{
static void Main()
{
ComponentInfo.SetLicense("FREE-LIMITED-KEY");
// Create new presentation.
var presentation = new PresentationDocument();
// Create new slide.
var slide = presentation.Slides.AddNew(SlideLayoutType.Blank);
// Add sample text.
var shape = slide.Content.AddShape(ShapeGeometryType.Rectangle, 120, 120, 250, 150);
shape.Format.Outline.Fill.SetSolid(Color.FromName(ColorName.Black));
shape.Format.Fill.SetSolid(Color.FromHsl(0, 0, 240));
var run = shape.Text.AddParagraph().AddRun("Lorem Ipsum");
run.Format.Fill.SetSolid(Color.FromName(ColorName.Red));
run.Format.Bold = true;
run = shape.Text.AddParagraph().AddRun("Lorem Ipsum");
run.Format.Fill.SetSolid(Color.FromName(ColorName.Green));
run.Format.Italic = true;
run = shape.Text.AddParagraph().AddRun("Lorem Ipsum");
run.Format.Fill.SetSolid(Color.FromName(ColorName.Blue));
run.Format.UnderlineStyle = UnderlineStyle.Single;
// Add sample image.
using (var stream = File.OpenRead("%#Dices.png%"))
slide.Content.AddPicture(PictureContentType.Png, stream, 480, 200, 240, 180);
// Save presentation in PPTX and PDF format.
presentation.Save("output.pptx");
presentation.Save("output.pdf");
}
}
Imports System.IO
Imports GemBox.Presentation
Module Program
Sub Main()
ComponentInfo.SetLicense("FREE-LIMITED-KEY")
' Create new presentation.
Dim presentation As New PresentationDocument()
' Create new slide.
Dim slide = presentation.Slides.AddNew(SlideLayoutType.Blank)
' Add sample text.
Dim shape = slide.Content.AddShape(ShapeGeometryType.Rectangle, 120, 120, 250, 150)
shape.Format.Outline.Fill.SetSolid(Color.FromName(ColorName.Black))
shape.Format.Fill.SetSolid(Color.FromHsl(0, 0, 240))
Dim run = shape.Text.AddParagraph().AddRun("Lorem Ipsum")
run.Format.Fill.SetSolid(Color.FromName(ColorName.Red))
run.Format.Bold = True
run = shape.Text.AddParagraph().AddRun("Lorem Ipsum")
run.Format.Fill.SetSolid(Color.FromName(ColorName.Green))
run.Format.Italic = True
run = shape.Text.AddParagraph().AddRun("Lorem Ipsum")
run.Format.Fill.SetSolid(Color.FromName(ColorName.Blue))
run.Format.UnderlineStyle = UnderlineStyle.Single
' Add sample image.
Using stream = File.OpenRead("%#Dices.png%")
slide.Content.AddPicture(PictureContentType.Png, stream, 480, 200, 240, 180)
End Using
' Save presentation in PPTX and PDF format.
presentation.Save("output.pptx")
presentation.Save("output.pdf")
End Sub
End Module
Limitations on Linux or macOS
You can use the full functionality of GemBox.Presentation on Unix systems, but with the following exceptions:
- Printing presentations.
- Saving presentations to XPS and image formats.
- Saving charts to PDF, XPS and image formats.
- Calling
ConvertToImageSource
andConvertToXpsDocument
methods.
These features currently have WPF dependencies which means they require a .NET Windows Desktop Runtime. However, we do have plans for providing cross-platform support for them in future releases.