如何參數傳遞到使用RegisterType和控制器工廠

Question

autofac我有這個類：

public class MessageService 
{ 
    private readonly IMessageSender messageSender; 

    public MessageService(IMessageSender messageSender) 
    { 
     this.messageSender = messageSender; 
    } 
} 

如何註冊autofac通過內部構造函數的參數：

var builder = new ContainerBuilder(); 
builder.RegisterControllers(typeof(MvcApplication).Assembly); 
var container = builder.Build(); 
DependencyResolver.SetResolver(new AutofacDependencyResolver(container)); 
builder.RegisterType<MandrillMessageSender>().As<IMessageSender>(); 

builder.RegisterType<MessageService>(new MandrillMessageSender()); // NOTE THIS STRING IS NOT WORKING 

所以結果應該這樣工作，當我在控制器構造函數中傳遞參數時，應該使用插入的MandrillMessageSerder創建messageService對象。

public Home(MessageService messageService) 

Answer 1

您需要調用builder.Build()

var builder = new ContainerBuilder(); 
builder.RegisterControllers(typeof(MvcApplication).Assembly); 
builder.RegisterType<MandrillMessageSender>().As<IMessageSender>(); 
builder.RegisterType<MessageService>(); 

var container = builder.Build(); 
DependencyResolver.SetResolver(new AutofacDependencyResolver(container)); 

注意，你不需要通過任何在MessageService註冊，如果你只有一個實現IMessageSender接口之前做的所有RegisterType電話（Autofac會知道你需要那裏的）