BlazorServerApp.md

Blazor Server application

This example demonstrates the creation of a Blazor server application in the pure DI paradigm using the Pure.DI code generator.

Composition setup file is Composition.cs:

using Pure.DI;
using static Pure.DI.Lifetime;

internal partial class Composition: ServiceProviderFactory<Composition>
{
    void Setup() => DI.Setup()
        .DependsOn(Base)
        // Specifies not to attempt to resolve types whose fully qualified name
        // begins with Microsoft.Extensions., Microsoft.AspNetCore.
        // since ServiceProvider will be used to retrieve them.
        .Hint(
            Hint.OnCannotResolveContractTypeNameRegularExpression,
            @"^Microsoft\.(Extensions|AspNetCore)\..+$")
        
        // View Models
        .Bind().To<ClockViewModel>()
            // Provides the composition root for Clock view model
            .Root<IClockViewModel>(nameof(ClockViewModel))
        .Bind().To<ErrorViewModel>()
            // Provides the composition root for Error view model
            .Root<IErrorViewModel>()

        // Services
        .Bind().To<Log<TT>>()
        .Bind().To(_ => TimeSpan.FromSeconds(1))
        .Bind().As(Singleton).To<Timer>()
        .Bind().As(PerBlock).To<SystemClock>()
        .Bind().As(Singleton).To<WeatherForecastService>()
            // Provides the composition root for Weather Forecast service
            .Root<IWeatherForecastService>()
        .Bind().As(Singleton).To<CounterService>()
            // Provides the composition root for Counter service
            .Root<ICounterService>()
        
        // Infrastructure
        .Bind().To<Dispatcher>();
}

The composition class inherits from the ServiceProviderFactory<T> class, where T is the composition class itself. It depends on the Base setup.

Te web application entry point is in the Program.cs file:

var builder = WebApplication.CreateBuilder(args);

// Uses Composition as an alternative IServiceProviderFactory
using var composition = new Composition();
builder.Host.UseServiceProviderFactory(composition);

The project file looks like this:

<Project Sdk="Microsoft.NET.Sdk.Web">

    <PropertyGroup>
        <TargetFramework>net9.0</TargetFramework>
        <Nullable>enable</Nullable>
        <ImplicitUsings>enable</ImplicitUsings>
    </PropertyGroup>

    <ItemGroup>
        <PackageReference Include="Pure.DI" Version="2.1.41">
            <PrivateAssets>all</PrivateAssets>
            <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
        </PackageReference>
        <PackageReference Include="Pure.DI.MS" Version="2.1.41" />
    </ItemGroup>

</Project>

It contains additional references to NuGet packages:

Pure.DI		DI Source code generator
Pure.DI.MS		Tools for working with Microsoft DI