如何的WebAPI

Question

注入的WebAPI的AccountController我有默認constuctor和構造函數使用參數喜歡這裏：

public class AccountController : ApiController 
{ 
    private const string LocalLoginProvider = "Local"; 
    private ApplicationUserManager _userManager; 
    public ISecureDataFormat<AuthenticationTicket> AccessTokenFormat { get; private set; } 
    [Dependency] 
    public IRepository Repository{ get; private set; } 

    public AccountController() 
    { 
    } 

    public AccountController(ApplicationUserManager userManager, ISecureDataFormat<AuthenticationTicket> accessTokenFormat) 
    { 
     _userManager = userManager; 
     AccessTokenFormat = accessTokenFormat; 
    } 
} 

我的統一配置在這裏：

.RegisterType<DbContext, ApplicationDbContext>(new HierarchicalLifetimeManager()) 
.RegisterType<UserManager<ApplicationUser, int>, ApplicationUserManager>()     
.RegisterType<ApplicationDbContext>(new HierarchicalLifetimeManager()) 
.RegisterType<ApplicationUserManager>() 

.RegisterType<ISecureDataFormat<AuthenticationTicket>, SecureDataFormat<AuthenticationTicket>>() 
.RegisterType<ITextEncoder, Base64UrlTextEncoder>() 
.RegisterType<IDataSerializer<AuthenticationTicket>, TicketSerializer>() 
//.RegisterType<IDataProtector>(() => new DpapiDataProtectionProvider().Create("ASP.NET Identity")) 

.RegisterType<IUserStore<ApplicationUser, int>, CustomUserStore>(new InjectionConstructor(typeof(ApplicationDbContext))) 
.RegisterType<IAuthenticationManager>(new InjectionFactory(o => HttpContext.Current.GetOwinContext().Authentication)) 
.RegisterType<IOwinContext>(new InjectionFactory(o => HttpContext.Current.GetOwinContext())) 
.RegisterType<IRepository, Repository>(); 

但問題是，默認構造函數總是被叫。 我讀taht文章blog但他們不說話怎麼如果我起飛參數的構造函數，我得到一個錯誤解決這種情況與構造havaving PARAMS AccountController(ApplicationUserManager userManager, ISecureDataFormat<AuthenticationTicket> accessTokenFormat)

："An error occurred when trying to create a controller of type 'AccountController'. Make sure that the controller has a parameterless public constructor.", 是否有任何人能幫助嗎？

我也有隻是正常ApiController，我是沒有得到注入，以及：基於@IgorPashchuk suggeston現在MyController是越來越現在注入

public class MyController : ApiController 
{ 
    [Dependency] 
    public IRepository Repository { get; set; } 

    public IHttpActionResult Get() 
    { 
     var test = Repository.GetSomething(); // Repository is null here always 
    } 
} 

更新1。 但AccoutController不是。我刪除了默認的構造函數，但仍然出現錯誤。

更新2我通過取出第二PARAM改變使用參數的構造器：

public class AccountController : ApiController 
{ 
    private const string LocalLoginProvider = "Local"; 
    private ApplicationUserManager _userManager; 

    [Dependency] 
    public IRepository Repository{ get; private set; } 

    public AccountController(ApplicationUserManager userManager) 
    { 
     _userManager = userManager; 
    } 
} 

於是就這樣我已經得到的東西正在工作。我的理解是否意味着Unity不能構造ISecureDataFormat<AuthenticationTicket>類型。我發表了關於此問題的另一個問題How to construct ISecureDataFormat<AuthenticationTicket> with unity

Answer 1

您應該刪除無參數的構造函數。

接下來，您需要配置一個自定義的依賴關係解析器，它將基本上包裝您的Unity容器。請參閱http://www.asp.net/web-api/overview/advanced/dependency-injection

之後，請確保您註冊了所有類型。例如，我沒有看到ApplicationUserManager的註冊。您正在註冊UserManager<ApplicationUser, int>，但不是ApplicationUserManager，這是IoC容器將嘗試解決的問題。