ASP MVC C#:是否可以将动态值传递给属性? [英] ASP MVC C#: Is it possible to pass dynamic values into an attribute?

问题描述

好的，我对 C# 很陌生，我正在尝试使用 ASP MVC2 创建一个小网站.

Okay I'm very new to C# and i'm trying to create a little website using ASP MVC2.

我想创建自己的授权属性.但如果可能的话，我需要传递一些值.

I want to create my own authorization attribute. but i need to pass some values if this is possible.

例如:

    [CustomAuthorize(GroupID = Method Parameter?]
    public ActionResult DoSomething(int GroupID)
    {
        return View("");
    }

我想授权访问一个页面.但这取决于传递给控制器​​的值.所以授权取决于groupID.这有可能以任何方式实现吗?

I want to authorize the access to a page. but it depends on the value passed to the controller. So the authorization depends on the groupID. Is this possible to achieve this in any way?.

提前致谢.

推荐答案

使用值提供者:

public class CustomAuthorizeAttribute : FilterAttribute, IAuthorizationFilter
{
    public void OnAuthorization(AuthorizationContext filterContext)
    {
        var result = filterContext.Controller.ValueProvider.GetValue("GroupId"); //groupId should be of type `ValueProviderResult`

        if (result != null)
        {
            int groupId = int.Parse(result.AttemptedValue);

            //Authorize the user using the groupId   
        }
   }

}

这篇文章可能会对你有所帮助.

HTH，
查尔斯

HTHs,
Charles

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