Scoped Service

Scoped service is a service type in Blazor Server DI. Scoped services are better for:

1. Business logic operations.
2. State is required.

Download the example for a working example containing the code snippets in this guide.

Creating a scoped service

1. Navigate to the Data folder and create the ScopedGuidProviderService.cs class:

using System;

namespace DependencyExampleBlazorSchool.Data
{
    public class ScopedGuidProviderService : IGuidProviderService
    {
        public Guid Id { get; set; } = Guid.NewGuid();
    }
}

2. Navigate to Startup.cs and register the service as a scoped service.

public void ConfigureServices(IServiceCollection services)
{
    ...
    services.AddScoped<ScopedGuidProviderService>();
}

For injecting and using a service, please refer to Dependency Injection.

Lifetime

Scoped services are created for each user request. Used for maintaining state within a request.

In the example provided at the beginning of this context, you will see a scoped service being injected 2 times and their values are different for each request.

Note: Use the "Trigger new request" in the example to create a new request.