ASP.NET MVC 使用Filter过滤器 验证用户登录状态

1.在项目下新建一个Filters的文件夹,用于放网站所有的过滤器

2.新建一个过滤器类:CheckCustomerAttribute,继承ActionFilterAttribute,重写方法OnActionExecuting

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
 
namespace ProductManagement.Filters
{
    public class CheckCustomerAttribute : ActionFilterAttribute  
    {
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            if (filterContext.HttpContext.Session["CustomerID"] == null)
            {
                filterContext.HttpContext.Response.Redirect("/login/index");
            }
        }
    }
}
 

 

3.在需要过滤的方法上面声明一下就可以了

[Filters.CheckCustomer]
 public ActionResult Index()
 {
        return View();
 }