Asp.net mvc 无默认构造函数的Autofac DI.NET MVC控制器

当我对ASP.NET MVC控制器使用Ajax查询时，我有一个错误：键入“Web.Implementation.Controllers.MyController”没有默认构造函数

我的代码：

    //In My Controller

    private IDataService DataService;

    //I try to delete this constructor, 
    //because I use DI and don't want to create a CurrentContext and DataService.
    public MyController()
    {
       var CurrentContext = new CurrentContext();
       DataService = new DataService(CurrentContext);
    }

    public MyController(IDataService dataService)
    {
        DataService = dataService;
    }

    //In Autofac Init
    builder.RegisterType<DataService>().As <IDataService>();

---

你至少可以用谷歌搜索一下吗？是的，谢谢，我在autofac init中编写了builder.RegisterType（）.InstancePerhtPrequest（），但它不起作用。您是否使用

DependencyResolver.SetResolver（新的AutofacDependencyResolver（容器））设置依赖项解析程序？我从global.asax调用初始化函数f
//in Global.asax
DependencyConfigure.Initialize();

//in DependencyConfigure class
 public static void Initialize()
        {
            var builder = new ContainerBuilder();
            DependencyResolver.SetResolver(
                new Dependency(RegisterServices(builder))
                );
        }