ASP.NET MVC - 在ActionFilter访问控制器属性 [英] ASP.NET MVC - Access a controller property in an ActionFilter

问题描述

我使用统一实例化一个新的类到控制器构造函数和保存注入的类在控制器内的属性。然后我想用一个ActionFilter，看是否注入类有一些属性我把它的构造函数中进行验证。那么，有没有使用一个ActionFilter来validade注入类的属性的方式？

I'm using Unity to instantiate a new class into the controller constructor and save the injected class in a property inside the controller. Then I want to use an ActionFilter to see if the injected class has some properties that I validate inside it's constructor. So is there a way to use an ActionFilter to validade the properties of the injected class?

在此先感谢

推荐答案

事情是这样的：

public class ValidateActionFilterAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        var yourController = filterContext.Controller as YourController;

        if (yourController == null)
        {
            throw new InvalidOperationException("It is not YourController !!!");
        }

        // It is YourController - validate here
        var yourProperty = yourController.YourProperty;

        // UPDATED ***************************
        // or test whether controller has property

        var property = filterContext.Controller.GetType().GetProperty("YourProperty");

        if(property == null)
        {
            throw new InvalidOperationException("There is no YourProperty !!!");
        }
    }
}

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