netcore2.2使用autofac

Nuget引用

Autofac
Autofac.Extensions.DependencyInjection

public IServiceProvider ConfigureServices(IServiceCollection services)
{
//使用autofac作为IOC
var containerBuilder = new ContainerBuilder();
containerBuilder.Populate(services);//将services里的内置的一些IOC和autofac整合
containerBuilder.RegisterModule< DefaultModuleRegister> ();
containerBuilder.RegisterType< BaseResponse> ().AsSelf();
return new AutofacServiceProvider(containerBuilder.Build());
}

新模块组件注册

containerBuilder.RegisterModule< DefaultModuleRegister> ();

using Autofac;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace YFJK.BasicServices.Host.Builder
{
    public class DefaultModuleRegister : Module
    {
        protected override void Load(ContainerBuilder builder)
        {
            builder.RegisterType< Models.BaseResponse> ().AsSelf();

        }
    }
}

指定构造函数参数注册

containerBuilder.RegisterType< Neo4jHelper> ().WithParameters(new List< NamedParameter> ()
          {
              new NamedParameter("bolturl",Configuration["Neo4jSetting:Bolt"]),
              new NamedParameter("httpurl",Configuration["Neo4jSetting:Url"]),
              new NamedParameter("user",SecurityCommon.DecryptDES(Configuration["Neo4jSetting:User"])),
              new NamedParameter("password",SecurityCommon.DecryptDES(Configuration["Neo4jSetting:Password"])),
          }).SingleInstance();

其他注入实例调用注册

containerBuilder.Register(a => 
      {
          return new MongoClient(a.Resolve< YFConsulConfig> ().GetConfig("BertPreditMongoDBConfig:Conn"));
      }).Named< MongoClient> ("BertPredit");

封装使用common

using Autofac;
using System;
using System.Collections.Generic;
using System.Text;

namespace YFJK.ScheduleTask.Library
{
    public class AutoFacCommon
    {
        private static IContainer AutofacContainer;

        public static void Init(IContainer container)
        {
            AutofacContainer = container;
        }
        public static void Dispose()
        {
            AutofacContainer.Dispose();
        }

        public static T GetInstance< T> (string name = null, ILifetimeScope scope = null)
        {
            if (scope == null)
            {
                using (scope = AutofacContainer.BeginLifetimeScope())
                {
                    if (string.IsNullOrWhiteSpace(name))
                    {
                        return scope.Resolve< T> ();
                    }
                    return scope.ResolveNamed< T> (name);
                }
            }
            else
            {
                if (string.IsNullOrWhiteSpace(name))
                {
                    return scope.Resolve< T> ();
                }
                return scope.ResolveNamed< T> (name);
            }
        }
        public static ILifetimeScope GetScope()
        {
            return AutofacContainer.BeginLifetimeScope();
        }
    }
}

注意 使用sqlconnection等资源时 按需求可能需要先获取scope 主动释放