How exactly does Microsoft.Extensions.Configuration dependent on ASP.NET Core?

How exactly does Microsoft.Extensions.Configuration dependent on ASP.NET Core?

Microsoft.Extensions.Configuration is a set of libraries for accessing and managing configuration data in .NET applications. It is not directly dependent on ASP.NET Core, but it is often used in ASP.NET Core applications to manage application configuration.

The Microsoft.Extensions.Configuration library includes several providers for loading configuration data from various sources, such as JSON files, environment variables, command line arguments, and more. These providers can be combined and customized to fit the needs of a particular application.

In an ASP.NET Core application, the Microsoft.Extensions.Configuration library is typically used in the Startup class to load configuration data and register it with the dependency injection container. For example, the following code loads configuration data from a appsettings.json file and registers it as a singleton service in the dependency injection container:

public class Startup { public IConfiguration Configuration { get; } public Startup(IConfiguration configuration) { Configuration = configuration; } public void ConfigureServices(IServiceCollection services) { services.AddSingleton(Configuration); } }

Once the configuration data is registered with the dependency injection container, it can be injected into other components throughout the application. For example, the following code injects the configuration data into a controller:

public class MyController : ControllerBase { private readonly IConfiguration _configuration; public MyController(IConfiguration configuration) { _configuration = configuration; } [HttpGet] public IActionResult Get() { string myConfigValue = _configuration["MyConfigKey"]; // do something with myConfigValue } }

In summary, while Microsoft.Extensions.Configuration is not directly dependent on ASP.NET Core, it is often used in ASP.NET Core applications to manage application configuration.

Examples

  1. ASP.NET Core IConfiguration overview

    • Description: Provides an overview of the IConfiguration interface in ASP.NET Core and its role in managing configuration settings.
    • Code:
      IConfiguration configuration = new ConfigurationBuilder() .AddJsonFile("appsettings.json") .Build();

  2. ASP.NET Core IConfiguration in Startup.cs

    • Description: Demonstrates how IConfiguration is used in the Startup.cs file to configure services and access app settings.
    • Code:
      public void ConfigureServices(IServiceCollection services) { IConfiguration configuration = Configuration.GetSection("MySettings"); services.Configure<MySettings>(configuration); }

  3. ASP.NET Core IConfiguration binding

    • Description: Explains the process of binding configuration sections to strongly typed objects using IConfiguration in ASP.NET Core.
    • Code:
      public class MySettings { public string ConnectionString { get; set; } public int MaxItemCount { get; set; } } MySettings settings = Configuration.GetSection("MySettings").Get<MySettings>();

  4. ASP.NET Core IConfiguration with environment variables

    • Description: Shows how IConfiguration can be used to read configuration from environment variables in ASP.NET Core.
    • Code:
      IConfiguration configuration = new ConfigurationBuilder() .AddEnvironmentVariables() .Build();

  5. ASP.NET Core IConfiguration with user secrets

    • Description: Explains how to use IConfiguration with user secrets during development in ASP.NET Core.
    • Code:
      IConfiguration configuration = new ConfigurationBuilder() .AddUserSecrets<Startup>() .Build();

  6. ASP.NET Core IConfiguration in Razor Pages

    • Description: Illustrates the usage of IConfiguration within Razor Pages for accessing configuration settings.
    • Code:
      @inject IConfiguration Configuration @{ var value = Configuration["MySetting"]; }

  7. ASP.NET Core IConfiguration reload on change

    • Description: Shows how to automatically reload configuration settings when they change without restarting the application.
    • Code:
      IConfigurationRoot configuration = new ConfigurationBuilder() .AddJsonFile("appsettings.json") .AddJsonFile("appsettings.development.json", optional: true, reloadOnChange: true) .Build();

  8. ASP.NET Core IConfiguration in Azure App Service

    • Description: Explains how to use IConfiguration with Azure App Service settings in an ASP.NET Core application.
    • Code:
      IConfiguration configuration = new ConfigurationBuilder() .AddAzureAppConfiguration(options => options.Connect("your_connection_string")) .Build();

  9. ASP.NET Core IConfiguration with command-line arguments

    • Description: Demonstrates how to use command-line arguments with IConfiguration in ASP.NET Core.
    • Code:
      IConfiguration configuration = new ConfigurationBuilder() .AddCommandLine(args) .Build();

  10. ASP.NET Core IConfiguration best practices

    • Description: Explores best practices for using IConfiguration in ASP.NET Core applications.
    • Code:
      IConfiguration configuration = new ConfigurationBuilder() .SetBasePath(Directory.GetCurrentDirectory()) .AddJsonFile("appsettings.json") .AddEnvironmentVariables() .Build();

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