这篇文章把Asp.net MVC的filter介绍的很详细，值得收藏。
http://www.dotnet-tricks.com/Tutorial/mvc/b11a280114-Understanding-ASP.NET-MVC-Filters-and-Attributes.html
Understanding ASP.NET MVC Filters and Attributes,布布扣,bubuko.com
Understanding ASP.NET MVC Filters and Attributes
原文：http://www.cnblogs.com/acles/p/3580085.html