过滤器

1.在Models中添加控制器类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using System.Web.Mvc;

namespace MvcValidateDemo.Models
{
    //AllowMultiple =true允许多个标签同时起作用
    //[AttributeUsage(AttributeTargets.All,AllowMultiple =true)]
   public  class MyActionFilterAttribute:ActionFilterAttribute
    {
        //Action执行之前执行方法
       public string Name { get; set; }
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            base.OnActionExecuting(filterContext);
            //HttpContext.Current.Session[""];
            HttpContext.Current.Response.Write("<br/>OnActionExecuting"+Name);
        }
        //Action执行之后
        public override void OnActionExecuted(ActionExecutedContext filterContext)
        {
            base.OnActionExecuted(filterContext);
            HttpContext.Current.Response.Write("<br/>OnActionExecuted" + Name);
        }
        //ActionResult执行之前执行此方法
        public override void OnResultExecuting(ResultExecutingContext filterContext)
        {
            base.OnResultExecuting(filterContext);
            HttpContext.Current.Response.Write("<br/>OnReslutExecuting" + Name);
        }
        //ActionResult执行之后
        public override void OnResultExecuted(ResultExecutedContext filterContext)
        {
            base.OnResultExecuted(filterContext);
            HttpContext.Current.Response.Write("<br/>OnReslutExecuted" + Name);
        }
    }
}

2.添加Home控制器

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

namespace MvcValidateDemo.Controllers
{
    [MyActionFilter(Name = "Home Action")]
    public class HomeController : Controller
    {
        
        // GET: Home
        [MyActionFilter(Name = "Index Action")]
        public ActionResult Index()
        {
            Response.Write("<p>Action执行了</p>");
            return Content("OK,视图被渲染");
        }
        //[MyActionFilter(Name="About  Action")]
        public ActionResult About()
        {
            //throw new Exception("demo");
            return Content("<p>About 渲染</p>");
        }
    }
}

全局异常过滤器

1.在Models中添加MyExceptionFilterAttribute控制器类

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

namespace _111111.Models
{
    public class MyEexeptionFilterAttribute : HandleErrorAttribute
    {
        public override void OnException(ExceptionContext filterContext)
        {
            base.OnException(filterContext);

            HttpContext.Current.Response.Redirect("/Home/Index");
        }
    }
}

在Home/About中手动构建一个异常

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

namespace _111111.Controllers
{
    public class HomeController : Controller
    {
        //
        // GET: /Home/

        public ActionResult Index()
        {
            return Content("dsjfjsj");
        }
        public ActionResult About()
        {
            throw new Exception("demo");
        }

    }
}

将自己的异常过滤器注册到全局过滤器中

using _111111.Models;
using System.Web;
using System.Web.Mvc;

namespace _111111
{
    public class FilterConfig
    {
        public static void RegisterGlobalFilters(GlobalFilterCollection filters)
        {
            filters.Add(new MyEexeptionFilterAttribute());
        }
    }
}