如何在ASP.NET Core RC2中获取控制器的自定义属性 [英] How to get custom attributes for a controller in asp.net core rc2

问题描述

我已经创建了一个自定义属性:

I have created a custom attribute :

[AttributeUsage(AttributeTargets.Method| AttributeTargets.Class)]
public class ActionAttribute : ActionFilterAttribute
{
    public int Id { get; set; }
    public string Work { get; set; }
}

我的控制器:

[Area("Administrator")]
[Action(Id = 100, Work = "Test")]
public class HomeController : Controller
{
    public IActionResult Index()
    {
        return View();
    }
}

我的代码:我使用反射来查找当前程序集中的所有Controller

my code : i use reflection to find all Controllers in the current assembly

 Assembly.GetEntryAssembly()
         .GetTypes()
         .AsEnumerable()
         .Where(type => typeof(Controller).IsAssignableFrom(type))
         .ToList()
         .ForEach(d =>
         {
             // how to get ActionAttribute ?
         });

是否可以务实地读取所有ActionAttribute?

is it possible to read all the ActionAttribute pragmatically?

推荐答案

要从类中获取属性，您可以执行以下操作:

To get an attributes from the class you can do something the following:

typeof(youClass).GetCustomAttributes<YourAttribute>();
// or
// if you need only one attribute
typeof(youClass).GetCustomAttribute<YourAttribute>();

它将返回IEnumerable<YourAttribute>.

因此，在您的代码中，它将类似于:

So, within your code it will be something like:

Assembly.GetEntryAssembly()
        .GetTypes()
        .AsEnumerable()
        .Where(type => typeof(Controller).IsAssignableFrom(type))
        .ToList()
        .ForEach(d =>
        {
            var yourAttributes = d.GetCustomAttributes<YourAttribute>();
            // do the stuff
        });

对于CoreCLR，您需要再调用一个方法，因为API有所更改:

In case with CoreCLR you need to call one more method, because the API has been changed a bit:

typeof(youClass).GetTypeInfo().GetCustomAttributes<YourAttribute>();

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