The system uses C/S three-tier architecture, using Sql Server 2005 for the , the main development language for the C#. Three-tier architecture: the so-called three-tier architecture is about the entire business applications are divided into: the presentation layer, business logic layer, data access layer. The purpose of the three-tier architecture is to make the logical structure of the entire system clear, logically maintain the relative independence, which can improve the system and software scalability and maintainability.         (1) that layer: to provide users with interactive interface, the user sends a request through the presentation layer.         (2) business logic layer: responsible for handling critical business logic and data transfer.         (3) data access layer: This layer is mainly on the access, for data maintenance.

CR.pptx
客户关系管理系统_邹太超_201220180863(1).doc

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