asp.net中配置文件如何注册引用

配置文件如何注册引用

注册配置文件的形式

注册方式

// 第一种注册方式：注册配置文件 
builder.Services.Configure<AppSettings>(builder.Configuration.GetSection("AppSettings"));
AppSettings appSettings = builder.Configuration.GetSection(AppSettings.Key).Get<AppSettings>()!;
Console.WriteLine(appSettings.Port);
Console.WriteLine(appSettings.ConnectionString);

使用方式

using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Options;

namespace AspDemo.Server.Controllers;

[ApiController]
[Route("[controller]")]
public class AppSettingTwoController : ControllerBase
{

    // 👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇
    private readonly AppSettings _appSettings;


    //                                  👇👇👇👇👇👇👇👇👇👇👇
    public AppSettingTwoController(IOptions<AppSettings> appSettings)
    {
        _appSettings = appSettings.Value;
    }

    [HttpGet]
    public IActionResult Get()
    {
        System.Console.WriteLine(_appSettings.ConnectionString);
        System.Console.WriteLine(_appSettings.Port);
        return Ok(_appSettings);
    }
}

将配置文件注册成单例模式

注册方式

// 第二种注册方式：将配置文件注册成单例模式 
builder.Services.AddSingleton(s => s.GetRequiredService<IOptions<AppSettings>>().Value);

使用方式

using Microsoft.AspNetCore.Mvc;

namespace AspDemo.Server.Controllers;

[ApiController]
[Route("[controller]")]
public class AppSettingController : ControllerBase
{
   
    // 👇👇👇👇👇👇👇👇👇👇👇👇👇👇👇
    private readonly AppSettings _appSettings;

    //                           👇👇👇👇👇👇👇👇👇
    public AppSettingController(AppSettings appSettings)
    {
    //   👇👇👇👇👇👇👇👇👇
        _appSettings = appSettings;
    }

    [HttpGet]
    public IActionResult Get()
    {
        System.Console.WriteLine(_appSettings.ConnectionString);
        System.Console.WriteLine(_appSettings.Port);
        return Ok(_appSettings);
    }
}