ASP.NET MVC 过滤器

过滤器又叫筛选器，一般有三种过滤器，一个是aciton过滤器，也就是执行action之前和之后，还一种是view过滤器，就是加载view之前和之后，最后一种就是异常过滤器，是异常后触发的。

很简单，只要类实现了ActionFilterAttribute这个接口，并重写里面的方法便可。上代码，一看便知

原文地址：http://www.cnblogs.com/sixiangqimeng/p/3567716.html

 public class MyActionFileterAttribute :ActionFilterAttribute
    {
        public string Name { get; set; }

        //当Action执行之前先执行此代码
        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            base.OnActionExecuting(filterContext);

            filterContext.HttpContext.Response.Write("<p>当前是：OnActionExecuting   by "+Name+"</p>");
        }

        public override void OnActionExecuted(ActionExecutedContext filterContext)
        {
            base.OnActionExecuted(filterContext);
            filterContext.HttpContext.Response.Write("<p>当前是：OnActionExecuted   by " + Name + "</p>");
        }

        public override void OnResultExecuting(ResultExecutingContext filterContext)
        {
            base.OnResultExecuting(filterContext);
            filterContext.HttpContext.Response.Write("<p>当前是：OnResultExecuting   by " + Name + "</p>");
        }

        public override void OnResultExecuted(ResultExecutedContext filterContext)
        {
            base.OnResultExecuted(filterContext);
            filterContext.HttpContext.Response.Write("<p>当前是：OnResultExecuted   by " + Name + "</p>");
        }

    }

实现时只需在控制器方法上加上[MyActionFileter(Name = "About ")]。

也可以设置全局的，整个项目都设置过滤器，秩序在过滤器设置里面设置

  public static void RegisterGlobalFilters(GlobalFilterCollection filters)
        {
            filters.Add(new MyExceptionFilterAttribute());

            filters.Add(new MyActionFileterAttribute(){Name = "gloable"});
        }

设置一个全局的即可