Filter Atttribute：

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Http.Controllers;
using System.Web.Mvc;
<pre name="code" class="csharp">[AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
public class MyFilterAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        base.OnActionExecuting(filterContext);

        var parameters = filterContext.ActionParameters;
        if (parameters.Keys.Contains("qxun_userkey"))
        {
            parameters["qxun_userkey"] as string;
        }
    }
}
 

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

namespace My.Areas.Controllers
{
    [MyAttribute]
    public class MyController : Controller
    {
        public ActionResult FunctionName(string u, string r, string a)
        {
            return View();
        }
    }
}