.NET6使用autofac依賴自動注入

1.Nuget引入以下包：

Autofac
Autofac.Extensions.DependencyInjection
Autofac.Extras.DynamicProxy

2.需要依賴注入的程序集隨便建個類，里面建個方法GetAssemblyName()獲取程序集名稱；

using System.Reflection;

namespace Service
{
    public static class ServiceAutofac
    {
        /// <summary>
        /// 獲取程序集名稱
        /// </summary>
        /// <returns></returns>
        public static string GetAssemblyName()
        {
            return Assembly.GetExecutingAssembly().GetName().Name;
        }
    }
}

3.Program.cs中注入autofac，需要注入的類和程序集如下：

// 以下是autofac依賴注入
builder.Host.UseServiceProviderFactory(new AutofacServiceProviderFactory());
builder.Host.ConfigureContainer<ContainerBuilder>(builder =>
{
     //先注入JWT
     builder.RegisterType<AuthorizeJWT>().As<IAuthorizeJWT>();//可以是其他接口和類
     // 注入Service程序集
     Assembly assembly = Assembly.Load(ServiceAutofac.GetAssemblyName());//可以是其他程序集
    builder.RegisterAssemblyTypes(assembly)
    .AsImplementedInterfaces()
    .InstancePerDependency();
});

4.使用-構造函數：

        private readonly IConfiguration _configuration;//配置
        private Authorize.IAuthorizeJWT _authorizeJWT;//認證
        private readonly ILogger<LoginController> _logger;//日志
       //依賴注入
        public LoginController(IConfiguration configuration, ILogger<LoginController> logger, Authorize.IAuthorizeJWT authorizeJWT)
        {
            _configuration = configuration;
            _logger = logger;
           _authorizeJWT=authorizeJWT;
        }

5.使用：

        /// <summary>
        /// 用戶登錄
        /// </summary>
        /// <param name="user"></param>
        /// <returns></returns>
        [HttpPost]
        public string Login([FromBody]ViewModels.UserLogin user)
        {
            _logger.LogError($"{System.Reflection.MethodBase.GetCurrentMethod().Name} Args:{user.ToString()}");
            return _authorizeJWT.GetJWTBear(user);
        }