ASP.NET MVC 拦截器

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Web.Mvc;





namespace Rhythmk.Sercurity.Attribute

{

    [AttributeUsage(AttributeTargets.Class|AttributeTargets.Method)]

   public  class MeAttribute : FilterAttribute, IAuthorizationFilter, IActionFilter

    {

        //IAuthorizationFilter

        public void OnAuthorization(AuthorizationContext filterContext)

        {

            filterContext.RequestContext.HttpContext.Response.Write("OnAuthorization<br/>");

        }



        //IActionFilter

        public void OnActionExecuted(ActionExecutedContext filterContext)

        {

            filterContext.RequestContext.HttpContext.Response.Write("OnActionExecuted<br/>");

        }



        //IActionFilter

        public void OnActionExecuting(ActionExecutingContext filterContext)

        {

            filterContext.Controller.ViewBag.CurrentData = "http://Rhythmk.cnblogs.com";

            if (filterContext.ActionParameters.ContainsKey("user"))

            {

                filterContext.ActionParameters["user"] = "UserID=rhythmk";

            }



            filterContext.RequestContext.HttpContext.Response.Write("OnActionExecuting<br/>");

        }

    }

}

 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

using System.Web.Security;

using Rhythmk.Sercurity.Attribute;



namespace MvcApp2.Controllers

{

    public class HomeController : Controller

    {

        [Me]  // http://rhythmk.cnblogs.com

        public ActionResult Index(string user)

        {

            HttpContext.Response.Write(string.Format("ViewBag.CurrentData:{0}<br/>", ViewBag.CurrentData));

            HttpContext.Response.Write("Home/Index<br/>");



            HttpContext.Response.Write(string.Format("user:{0}<br/>",user));



            return View();

        }



       

    }

}

输出结果：

OnAuthorization
OnActionExecuting
ViewBag.CurrentData:http://Rhythmk.cnblogs.com
Home/Index
user:UserID=rhythmk
OnActionExecuted

异常拦截：

public class ActionErrorAttribute : ActionFilterAttribute, IExceptionFilter
    {
        /// <summary>
        /// 过滤异常信息
        /// </summary>
        /// <param name="filterContext"></param>
        public void OnException(ExceptionContext filterContext)
        {
            Exception error = filterContext.Exception;

           
            filterContext.ExceptionHandled = true; //设置异常已经处理
            filterContext.RequestContext.HttpContext.Response.Write(error.Message);
        }
    }

 

 

使用：

 [ActionError]
 public ActionResult TestError()
 {
     int i = int.Parse("rhythmk");
    return Content("OK");
 }

 

    通过拦截器 传入参数写操作日志：

public void OnActionExecuted(ActionExecutedContext filterContext)
{
　　string routeId = string.Empty;
      if (filterContext.Controller.ViewData["CompanyId"] != null)
      {
         routeId = filterContext.Controller.ViewData["CompanyId"].ToString();
       }
　　filterContext.RequestContext.HttpContext.Response.Write("OnActionExecuted<br/>"+routeId);
}