ASP.NET MVC3 + ActionFilterAttribute +注入？ [英] ASP.NET MVC3 + ActionFilterAttribute + Injection?

问题描述

嘿，我succesfull已经能够使用属性注入在我FilterAttribute，但是我想知道它是否可能将其移动到构造呢？

Hey there, I've succesfull been able to use property injection in my FilterAttribute, however I'm wondering whether its possible to move it into the constructor instead?

我目前的code：

// AuthAttribute.cs

public class AuthAttribute : ActionFilterAttribute
{
    public Roles _authRoles { get; private set; }

    [Inject]
    private readonly IAuthorizationService _service;

    public AuthAttribute(Roles roles)
    {
        _authRoles = roles;
    }

    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        if (!filterContext.HttpContext.User.Identity.IsAuthenticated)
        {
            string redirectOnSuccess = filterContext.HttpContext.Request.Url.AbsolutePath;
            string redirectUrl = string.Format("?returnUrl={0}", redirectOnSuccess);
            string loginUrl = FormsAuthentication.LoginUrl + redirectUrl;

            filterContext.HttpContext.Response.Redirect(loginUrl, true);
        }
        else
        {
            bool isAuthorized = _service.Authorize(GetUserSession.Id, _authRoles.ToString());

            if (!isAuthorized)
            {
                // TODO: Make custom "Not Authorized" error page.
                throw new UnauthorizedAccessException("No access");
            }
        }
    }
}

＆NBSP;

// TestController.cs

[Auth(Roles.Developer)]
public ActionResult Index()
{
    // Some smart logic
}

在此先感谢！

推荐答案

没有，这是不可能的参数构造函数<一个href=\"http://stackoverflow.com/questions/1235617/how-to-pass-objects-into-an-attribute-constructor\">must简单类型的。

No, this isn't possible as the parameters for the constructors must be simple types.

有关测试的目的，你可以有另一个构造函数（因为你不应该使用与测试IoC容器）：

For testing purposes, you could have another constructor (since you shouldn't be using an IoC container with testing):

public class AuthAttribute : ActionFilterAttribute
{
    public Roles _authRoles { get; private set; }

    [Inject]
    private readonly IAuthorizationService _service;

    public AuthAttribute(Roles roles)
    {
        _authRoles = roles;
    }

    public AuthAttribute(Roles roles, IAuthorizationService authSvc)
        : this(roles)
    {
        this.service = authSvc;
    }

    // ...
}

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