Plugin.Maui.Theme 9.0.1

.NET 9.0 This package targets .NET 9.0. The package is compatible with this framework or higher.
There is a newer version of this package available.
See the version list below for details. 
dotnet add package Plugin.Maui.Theme --version 9.0.1
                    


                    

                
NuGet\Install-Package Plugin.Maui.Theme -Version 9.0.1
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Plugin.Maui.Theme" Version="9.0.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Plugin.Maui.Theme" Version="9.0.1" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Plugin.Maui.Theme" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add Plugin.Maui.Theme --version 9.0.1
                    


                    

                
#r "nuget: Plugin.Maui.Theme, 9.0.1"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package Plugin.Maui.Theme@9.0.1
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=Plugin.Maui.Theme&version=9.0.1
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Plugin.Maui.Theme&version=9.0.1
                    


                            Install as a Cake Tool

🌈 Plugin.Maui.Theme

The Plugin.Maui.Theme library provides a powerful theme management service for .NET MAUI applications, allowing dynamic switching of visual styles.

🔧 Class ThemeService

A singleton service that manages application themes via ResourceDictionary.

📦 Properties and Fields

  • ThemeService.Current: Static property to access the current instance.
  • _themes: Dictionary containing registered themes (Dictionary<int, ResourceDictionary>).
  • _appResources: Reference to the application's MergedDictionaries.
  • _currentDict: Currently applied ResourceDictionary.
  • _currentTheme: Key-value pair representing the active theme.

🔑 Метод InitAppResources

Инициализирует ссылку на MergedDictionaries приложения.

public void InitAppResources(ResourceDictionary resource)

💥Throws ArgumentNullException if the resource is null.

🎨 Method AddTheme

Registers a theme in the collection.

public void AddTheme(int key, ResourceDictionary theme, bool isDefault = false)
  • key: Unique identifier for the theme.
  • theme: ResourceDictionary defining the theme.
  • isDefault: If true, sets the theme as the default.

🔄 Method ChangeTheme

Switches the application to the specified theme.

public void ChangeTheme(int key)

🧯 Throws exceptions if the theme is not found or InitAppResources was not called.

⚙️ Method InitService

Finalizes service setup.

public void InitService()
  • If the theme is already in MergedDictionaries, it becomes active.
  • Otherwise, the default or first available theme is applied.

📡 Event ThemeChanged

Triggered whenever the theme is changed:

public event EventHandler<ThemeChangedEventArgs>? ThemeChanged;
  • Arguments include KeyTheme and NewTheme.

🧾 Record ThemeChangedEventArgs

public record ThemeChangedEventArgs(int KeyTheme, ResourceDictionary NewTheme);

Used to notify subscribers about theme changes.

✅ Usage Example

In the App.xaml.cs class, you can use ThemeService like this:

protected override Window CreateWindow(IActivationState? activationState)
{
	ThemeService.Current.InitAppResources(Resources);

	ThemeService.Current.AddTheme(0, new BlueTheme());
	ThemeService.Current.AddTheme(1, new DarkTheme());
	ThemeService.Current.AddTheme(2, new RedTheme(), true);

	ThemeService.Current.InitService();

	ThemeService.Current.ThemeChanged += Current_ThemeChanged;

	return new Window(new AppShell());
}

🧠 Highlights

  • Supports multiple themes.
  • Enables dynamic switching.
  • Event-driven UI updates.

🛠 Author: Fishman 📅 Last updated: July 2025

📄 License

This project is licensed under the Boost Software License – Version 1.0 – August 17th, 2003.

Product Compatible and additional computed target framework versions.
.NET net9.0-android35.0 is compatible.  net9.0-ios18.0 is compatible.  net9.0-maccatalyst18.0 is compatible.  net9.0-windows10.0.26100 is compatible.  net10.0-android was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

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Version Downloads Last Updated
9.2.2 217 8/5/2025
9.2.1 69 7/27/2025
9.2.0 64 7/19/2025
9.0.1 138 7/13/2025

Plugin.Maui.Theme is a lightweight and extendable library for managing application-wide themes in .NET MAUI. It provides a centralized ThemeService that registers and switches between ResourceDictionary instances at runtime, allowing developers to apply styles dynamically without restarting the app.
The service tracks the current theme, supports initialization from existing resources, and raises a ThemeChanged event to help update the UI responsively. With a clean API and strict null checks, Plugin.Maui.Theme simplifies adaptive styling across platforms and is designed for easy integration with MVVM-based architectures and custom UI flows.