ASP.NET MVC 框架是微软今后开发Web 应用程序的一个主流技术。本文介绍了如何将一个基于多层架构、 ASP.NET 4 技术的Web Forms 应用迁移为多层架构的ASP.NET 4 MVC 框架应用。从多层架构的角度出发，深入剖析了MVC 模式工作原理，并给出了一个多层架构的ASP.NET 4 MVC 客户关系管理系统实例。

ASP.NET MVC framework is a mainstream technology for developing Web applications in the future. This paper describes how to transfer a Web Forms application based on multi-tiers architecture and ASP.NET 4 technology to a ASP.NET 4 MVC framework for multi-tiers architecture. From the perspective of multi-tiers architecture, the working principle of MVC mode is analyzed, and a MVC 4 ASP.NET customer relationship management system is given.