How deeply does Building Web APIs with ASP.NET Core cover bean scope?

Explains scoped registration, SaveChanges timing, change detection, persistence, and disposal before addressing connection-string security.

Bean scope

As explained in Building Web APIs with ASP.NET Core

A scoped service is a dependency-injected service instance whose lifetime is limited to a single scope, typically one HTTP request in ASP.NET Core.

A scoped service lives for one unit of work. In the board-game API, ApplicationDbContext is registered with ASP.NET Core’s service provider so a batch operation can use the same context before it is disposed. section 4.3.4

Configure the scoped database service in Program.cs:

Register ApplicationDbContext with AddDbContext. section 4.3.4
Configure SQL Server using the DefaultConnection connection string. section 4.3.4
Use SaveChanges after the batch operation so EF Core detects and persists the changes. section 4.3.4
Keep credentials out of committed source by using ignored development settings, environment variables, or Secret Manager. section 4.3.4

builder.Services.AddDbContext<ApplicationDbContext>(options =>
   options.UseSqlServer(
       builder.Configuration.GetConnectionString("DefaultConnection"))
   );

The registration connects the scoped ApplicationDbContext to SQL Server and retrieves the DefaultConnection value from configuration. section 4.3.4

How Building Web APIs with ASP.NET Core covers it

Cover of Building Web APIs with ASP.NET Core

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Also explained in

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ASP.NET Core in Action, 3eA scoped lifetime reuses one service instance within a dependency-injection scope and creates different instances for different scopes.
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Pro ASP.NET Core 7, Tenth EditionA scoped service is a dependency-injection service whose instance is reused within a defined scope, such as one HTTP request scope.

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Related concepts

AddScopedconfigured by · AddScoped is a .NET dependency-injection registration method that assigns a service a scoped lifetime, creating one instance per lifetime scope.
servicekind of · A service is an application component that provides defined capabilities to other components through an interface.
request scopeincludes · Request scope is a Spring bean scope in which a distinct bean instance is created for each HTTP request.

This explainer was generated by Manning's knowledge graph from the text of Building Web APIs with ASP.NET Core. The section links point to the parts of the book it draws on.