[dotnet core]Autofac 注入配置

Autofac 注入配置

新建一个继承于Autofac.Module的AutofacModuleRegister类

  public class AutofacModuleRegister : Autofac.Module
  {
      //重写Autofac管道Load方法，在这里注册注入
      protected override void Load(ContainerBuilder builder)
      {
          //注册Service中的对象,Service中的类要以Service结尾，否则注册失败
          builder.RegisterAssemblyTypes(Assembly.Load("Power.Server")).Where(a => a.Name.EndsWith("Service")).AsImplementedInterfaces();
          //注册Repository中的对象,Repository中的类要以Repository结尾，否则注册失败
          builder.RegisterAssemblyTypes(Assembly.Load("Power.Data")).Where(a => a.Name.EndsWith("Repository")).AsImplementedInterfaces();

          builder.RegisterType<WxPayService>().Named<IPayService>(typeof(WxPayService).Name);

          builder.RegisterType<AliPayService>().Named<IPayService>(typeof(AliPayService).Name);

          builder.RegisterType<PowerControlConnectionStrings>().Named<IConnectionStrings>(typeof(PowerControlConnectionStrings).Name);
      }
}

在StartUp类中新建RegisterAutofac方法

private IServiceProvider RegisterAutofac(IServiceCollection services)
{
    //实例化Autofac容器
    var builder = new ContainerBuilder();
    //将Services中的服务填充到Autofac中
    builder.Populate(services);
    //新模块组件注册    
    builder.RegisterModule<AutofacModuleRegister>();
    //创建容器
    var Container = builder.Build();
    //第三方IOC接管 core内置DI容器 
    return new AutofacServiceProvider(Container);
}

在ConfigureServices方法内调用RegisterAutofac方法

public IServiceProvider ConfigureServices(IServiceCollection services)
{
      return RegisterAutofac(services);
}

使用样例

private readonly IPersonService _personService;
private readonly IPayService _wxPayService;
private readonly IPayService _aliPayService;
public HomeController(IPersonService personService, IComponentContext componentContext, IConnectionStrings connection)
{
    _personService = personService;
    _wxPayService = componentContext.ResolveNamed<IPayService>(typeof(WxPayService).Name);
    _aliPayService = componentContext.ResolveNamed<IPayService>(typeof(AliPayService).Name);
}