先看一段实例
public class Log : FilterAttribute, IActionFilter ???{ ???????public void OnActionExecuted(ActionExecutedContext filterContext) ???????{ ???????????Console.WriteLine("log-after"); ???????} ???????public void OnActionExecuting(ActionExecutingContext filterContext) ???????{ ???????????Console.WriteLine("log-before"); ???????} ???}public class HomeController : Contoller ???{ ???????[Log] ???????public ActionResult Index() ???????{ ???????????return View(); ???????} ???}MVC有四种过滤器
ActionFilter（方法过滤器）：实现接口：[IActionFilter]；在Action调用前和调用后执行
ResultFilter（结果过滤器）：实现接口：[IResultFilter]；在Action Result调用完，跳转至view页面前/后执行
AuthorizationFilter（授权过滤器）：实现接口：[IauthorizationFilter]；所有过滤器中最先执行的
ExceptionFilter（异常处理过滤器）：实现接口:[IExceptionFilter]:在控制器方法抛出异常时执行
应用场景
public class FilterConfig ???{ ???????public static void RegisterGlobalFilters(GlobalFilterCollection filters) ???????{ ???????????filters.Add(new HandleErrorAttribute()); ???????????filters.Add(new MyAuthorAttribute()); ???????????filters.Add(new ExceptionFilter());//异常过滤器 ???????} ???}public class MyAuthorAttribute : FilterAttribute, IAuthorizationFilter ???{ ???????public void OnAuthorization(AuthorizationContext filterContext) ???????{ ?/// ???????} ???}Global实现全局
//实现全局FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
asp.net mvc之过滤器
原文地址：https://www.cnblogs.com/shiyige-216/p/8656631.html