相关疑难解决方法(0)

我正在为asp.net mvc 3编写自定义授权过滤器.我需要向用户服务注入类,但我不知道如何做到这一点.

public class AuthorizeAttribute : FilterAttribute, IAuthorizationFilter
{
    private IUserService userService;
    private string[] roles;

    public AuthorizeAttribute(params string[] roles)
    {
        this.roles = roles;
    }

    public void OnAuthorization(AuthorizationContext filterContext)
    {
        throw new NotImplementedException();
    }
}

我正在使用ninject进行依赖注入.我不想使用Factory或服务定位器模式.

我的绑定在global.acsx中看起来像这样:

    internal class SiteModule : NinjectModule
    {
        public override void Load()
        {
            Bind<IUserService>().To<UserService>();
        }
    }

我尽可能多地阅读了这些答案,但它们似乎没有达到一个细节.

问题是当动作过滤器(由控制器注入的服务)绑定到相应的属性时,我一直无法弄清楚如何将参数/属性值从属性传递到其绑定过滤器.下面是代码,下面是我想要的假代码:

过滤器和属性

public class AuthorizationFilter : IAuthorizationFilter
{
    private readonly IAuthorizationService _authorizationService;
    private readonly UserRoles _requiredRoles;   // Enum

    public AuthorizationFilter(IAuthorizationService authorizationService, UserRoles requiredRoles)
    {
        _authorizationService = authorizationService;
        _requiredRoles = requiredRoles;
    }

    public void OnAuthorization(AuthorizationContext filterContext)
    {
        if (filterContext.HttpContext.Session == null)
            HandleUnauthorizedRequest(filterContext);
        else {
            var authorized = _authorizationService.IsUserInRole((UserSessionInfoViewModel) filterContext.HttpContext.Session["user"], _requiredRoles);
            if (!authorized)
                HandleUnauthorizedRequest(filterContext);
            // else TODO: deal with cache... 
        }
    }
}

public class RequireRolesAttribute : FilterAttribute
{
    public readonly UserRoles RequiredRoles;

    public RequireRolesAttribute(UserRoles requiredRoles)
    {
        RequiredRoles = requiredRoles;
    } …

我使用的是asp.net mvc 3,ninject 2.0和ninject mvc 3插件.

我想知道如何将服务层添加到我的过滤器中(在这种情况下是授权过滤器？).

我喜欢做构造函数注入,所以这是可能的还是我必须注入属性？

谢谢

编辑

我有这个属性注入,但我的属性总是为空

  [Inject]
        public IAccountService AccountServiceHelper { get; set; }


        protected override bool AuthorizeCore(HttpContextBase httpContext)
        {
            // check if context is set
            if (httpContext == null)
            {
                throw new ArgumentNullException("httpContext");
            }

            // check if user is authenticated
            if (httpContext.User.Identity.IsAuthenticated == true)
            {
                // stuff here
                return true;
            }

            return false;
        }



    /// <summary>
    /// Application_Start
    /// </summary>
    protected void Application_Start()
    {

        // Hook our DI stuff when application starts
        IKernel kernel …