ASP.NET MVC 攔截器

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();        }           }}

輸出結果：

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

異常攔截：

public class ActionErrorAttribute : ActionFilterAttribute, IExceptionFilter
    {
        /// <summary>
        /// 過濾異常資訊
        /// </summary>
        /// <param name="filterContext"></param>
        public void OnException(ExceptionContext filterContext)
        {
            Exception error = filterContext.Exception;

           
            filterContext.ExceptionHandled = true; //設定異常已經處理
            filterContext.RequestContext.HttpContext.Response.Write(error.Message);
        }
    }

 

 

使用：

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