依赖注入与asp.net的MVC Ninject和Filter属性 [英] Dependency Injection with Ninject and Filter attribute for asp.net mvc

问题描述

我写的asp.net mvc的自定义过滤器授权3.我需要注入userservice进级，但我不知道如何做到这一点。

 公共类AuthorizeAttribute：FilterAttribute，个IAuthorizationFilter
{
    私人IUserService userService;
    私人的String []的作用;    公共AuthorizeAttribute（PARAMS字符串[]的角色）
    {
        this.roles =角色;
    }    公共无效OnAuthorization（AuthorizationContext filterContext）
    {
        抛出新NotImplementedException（）;
    }
}
 

我使用ninject依赖注入。我不想用一个工厂或服务定位器模式。

我的绑定看起来像这样在global.acsx：

 内部类SiteModule：NinjectModule
    {
        公共覆盖无效负载（）
        {
            绑定＆所述; IUserService方式＆gt;（）到＆lt; UserService＆GT;（）;
        }
    }
 

解决方案

看到这个答案：

<一个href=\"http://stackoverflow.com/questions/5572257/custom-authorization-mvc-3-and-ninject-ioc/5572752#5572752\">Custom授权MVC 3和Ninject的IoC

如果你想使用构造器注入，那么你需要创建一个属性和过滤器。

  ///标记属性
公共类MyAuthorizeAttribute：FilterAttribute {}//过滤
公共类MyAuthorizeFilter：个IAuthorizationFilter
{
      私人只读IUserService _userService;
      公共MyAuthorizeFilter（IUserService userService）
      {
          _userService = userService;
      }      公共无效OnAuthorization（AuthorizationContext filterContext）
      {
          变种VALIDUSER = _userService.CheckIsValid（）;          如果（！VALIDUSER）
          {
              filterContext.Result =新RedirectToRouteResult（新RouteValueDictionary {{行动，存取遭拒}，{控制器，错误}}）;
          }
      }
}
 

绑定：

  this.BindFilter＆LT; MyAuthorizeFilter＆GT;（System.Web.Mvc.FilterScope.Controller，0）.WhenControllerHas＆LT; MyAuthorizeAttribute＆GT;（）;
 

控制器：

  [MyAuthorizeAttribute]
公共类YourController：控制器
{}
 

HTH ...

I'm writing a custom Authorization Filter for asp.net mvc 3. I need to inject a userservice into the class but I have no idea how to do this.

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();
    }
}

I'm using ninject for dependency injection. I do not want to use a Factory or service locator pattern.

My bindings look like this in the global.acsx:

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

解决方案

See this answer:

Custom Authorization MVC 3 and Ninject IoC

If you want to use constructor injection then you need to create an attribute and a filter.

///marker attribute
public class MyAuthorizeAttribute : FilterAttribute { }

//filter
public class MyAuthorizeFilter : IAuthorizationFilter
{
      private readonly IUserService _userService;
      public MyAuthorizeFilter(IUserService userService)
      {
          _userService = userService;
      }

      public void OnAuthorization(AuthorizationContext filterContext)
      {
          var validUser = _userService.CheckIsValid();

          if (!validUser)
          {
              filterContext.Result = new RedirectToRouteResult(new RouteValueDictionary { { "action", "AccessDenied" }, { "controller", "Error" } });
          }
      }
}

Binding:

this.BindFilter<MyAuthorizeFilter>(System.Web.Mvc.FilterScope.Controller, 0).WhenControllerHas<MyAuthorizeAttribute>();

Controller:

[MyAuthorizeAttribute]
public class YourController : Controller
{

}

HTH...

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