自定义过滤器属性注入依赖性 [英] Custom filter attributes inject dependency

问题描述

我正在使用ASP.NET Web API，需要获得授权，因此我创建了自定义授权属性

I'musing ASP.NET Web API and I need to have authorization so I've created custom authorization attribute

public class CustomAuthorizationAttribute : AuthorizeAttribute

为了在构造函数中注入依赖项，我有以下内容:

In order to inject dependency inside constructor I have following :

        public CustomAuthorizationAttribute(IAccountBL accountBl)
    {
        _accountBL = accountBl;
    }

在 IAccountBL 中，我有一种与数据库交互的方法，用于检查用户是否有权发出请求.在成员API控制器内部，我已经注册了该属性

In IAccountBL I have method which interacts with database checking if user is authorized to make request. Inside Member API controller I've register that attribute

    [CustomAuthorization]
public class MemberController : ApiController

但是我收到以下错误

Project.Account.AccountBL'不包含带有0个参数的构造函数

Project.Account.AccountBL' does not contain a constructor that takes 0 arguments

如果我像

[CustomAuthorization(IAccountBL)]

谢谢

推荐答案

如果有人发现了类似的问题，这就是我设法解决的问题.

If anyone finds similar issue here's how I manage to solve it.

我的自定义过滤器继承了 IAutofacAuthorizationFilter .除了这一点，您还可以继承 IAutofacExceptionFilter 和 IAutofacActionFilter .在我的DI容器中，我已经为要使用的每个控制器注册了此过滤器

My custom filter inherits IAutofacAuthorizationFilter. Besides this one you can also inherit IAutofacExceptionFilter and IAutofacActionFilter. And inside my DI container I've register this filter for each controller I want to use like this

        builder.Register(c => new CustomAuthorizationAttribute(c.Resolve<IAccountBL>()))
               .AsWebApiAuthorizationFilterFor<MemberController>()
               .InstancePerApiRequest();

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