ASP.NET MVCはActionFilterAttributeを利用して権限等を行う

ActionFilterAttributeは、アクションを実行する前に実行するアクションフィルタクラスである.ActionFilterAttributeはMVCのactionフィルタリングを専門に処理するクラスである.この原理に基づいて権限制限を行います
たとえば、HomeControllerのtest actionにアクセスする方法
 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MvcTest.Models;
namespace MvcTest.Controllers
{
    public class HomeController : Controller
    {
        //
        // GET: /Home/

      
        public ActionResult Index()
        {

            return View();
        }
        [AuthorizeFilter]
        public ActionResult test()
        {
            return Content("    ");
        }
    }
}

AuthorizeFilterAttributeを作成します.csの内容は以下の通りです

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace MvcTest.Models
{
    /// <summary>
    ///　    
    /// </summary>
    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false)]
    public class AuthorizeFilterAttribute : ActionFilterAttribute
    {
        filterContextInfo fcinfo;
        // OnActionExecuted           ASP.NET MVC     。
        // OnActionExecuting            ASP.NET MVC     。
        // OnResultExecuted           ASP.NET MVC     。
        // OnResultExecuting            ASP.NET MVC     。

        /// <summary>
        ///            ASP.NET MVC     。
        /// </summary>
        /// <param name="filterContext"></param>
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {

            fcinfo = new filterContextInfo(filterContext);
            //fcinfo.actionName;//    
            //fcinfo.controllerName;   controllerName   

            bool isstate = true;
            //islogin = false;
            if (isstate)//    
            {
                //    
                // filterContext.Result = new HttpUnauthorizedResult();//  URL               
                // filterContext.Result = new RedirectResult("http://www.baidu.com");//         
                //filterContext.Result = new RedirectToRouteResult(new System.Web.Routing.RouteValueDictionary(new { Controller = "product", action = "Default" }));
            }
            else
            {
                filterContext.Result = new ContentResult { Content = @"  ,           ！" };//      return Content("  ,           ！")
            }
           
        }
        /// <summary>
        ///           ASP.NET MVC     。
        /// </summary>
        /// <param name="filterContext"></param>
        public override void OnActionExecuted(ActionExecutedContext filterContext)
        {

            base.OnActionExecuted(filterContext);
        }

        /// <summary>
        ///  OnResultExecuted           ASP.NET MVC     。
        /// </summary>
        /// <param name="filterContext"></param>
        public override void OnResultExecuted(ResultExecutedContext filterContext)
        {
            base.OnResultExecuted(filterContext);
        }
        /// <summary>
        /// OnResultExecuting            ASP.NET MVC     。
        /// </summary>
        /// <param name="filterContext"></param>
        public override void OnResultExecuting(ResultExecutingContext filterContext)
        {
            base.OnResultExecuting(filterContext);
        }

    }

    public class filterContextInfo
    {
        public filterContextInfo(ActionExecutingContext filterContext)
        {
            #region         
            //     
            domainName = filterContext.HttpContext.Request.Url.Authority;

            //      
            //  module = filterContext.HttpContext.Request.Url.Segments[1].Replace('/', ' ').Trim();

            //   controllerName   
            controllerName = filterContext.RouteData.Values["controller"].ToString();

            //  ACTION   
            actionName = filterContext.RouteData.Values["action"].ToString();

            #endregion
        }
        /// <summary>
        ///     
        /// </summary>
        public string domainName { get; set; }
        /// <summary>
        ///       
        /// </summary>
        public string module { get; set; }
        /// <summary>
        ///    controllerName   
        /// </summary>
        public string controllerName { get; set; }
        /// <summary>
        ///   ACTION   
        /// </summary>
        public string actionName { get; set; }

    }

}

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