Layer-7 structure of Asp.net

UI: the user can see the interface, which can be Asp.net, winform, and so on, with little impact on coding. The final implementation can be achieved.

SF: handle exceptions and other special operations

BF: operation method set, used to call the implementation method

be: entity contains various types of data dataset ......

Br: Rule class, it is mainly used to verify (non-null, format, existence or not)

da: data operation class, used to add, delete, modify, and query databases

--- dbutility data layer base class
--- dalfactory data layer factory class
--- idal interface layer
--- sqldal interface Implementation Layer
--- model entity class
--- logic business logic layer
--- WEB presentation layer