我正在尝试使用Autofac自动装配属性为控制器调用的自定义类设置一个类。我有一个设置测试项目来展示这一点。我的解决方案中有两个项目。 MVC Web应用程序和服务类库。这是代码:
在服务项目中,AccountService.cs:
public interface IAccountService
{
string DoAThing();
}
public class AccountService : IAccountService
{
public string DoAThing()
{
return "hello";
}
}
现在剩下的就是MVC网络项目。
的Global.asax.cs
var builder = new ContainerBuilder();
builder.RegisterControllers(Assembly.GetExecutingAssembly()).PropertiesAutowired();
builder.RegisterAssemblyTypes(typeof(AccountService).Assembly)
.Where(t => t.Name.EndsWith("Service"))
.AsImplementedInterfaces().InstancePerRequest();
builder.RegisterType<Test>().PropertiesAutowired();
builder.RegisterFilterProvider();
var container = builder.Build();
DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
test.cs中:
public class Test
{
//this is null when the var x = "" breakpoint is hit.
public IAccountService _accountService { get; set; }
public Test()
{
}
public void DoSomething()
{
var x = "";
}
}
HomeController.cs
public class HomeController : Controller
{
//this works fine
public IAccountService _accountServiceTest { get; set; }
//this also works fine
public IAccountService _accountService { get; set; }
public HomeController(IAccountService accountService)
{
_accountService = accountService;
}
public ActionResult Index()
{
var t = new Test();
t.DoSomething();
return View();
}
//...
}
从上面的代码中可以看出,_accountServiceTest
和_accountService
在控制器中工作正常,但在DoSomething()
Test.cs
方法中设置断点时,_accountService
始终为空,无论我放入global.asax.cs
。
答案 0 :(得分:2)
使用new
创建对象时,autofac对此对象一无所知。因此,IAccountService
始终为null,这是正常的。
这样的正确方法: 设置Test类的接口并注册它。然后将此接口添加到HomeController构造函数中。
public HomeController(IAccountService accountService,ITest testService)