Detail: IBatisNet. DataMapper 1.6.1.0 Simple Three Layers First, introduce the architecture of Solution, which consists of four projects:\ nWeb ： Front end application\ nBLL ： If you find it troublesome, you can further abstract the business processing layer and place the code in aspx.cs of the web layer\ nModel ： I won't go into too much detail about this. Everyone on Earth knows about (data entity class) SqlMaps: resource class, which packages configuration files and SQL mapper files together\ Two folders:\ N Include: DLL files for iBatis. Net architecture Log: folder for storing log files, configured in Web. config 1. In some specific environments, a one-stop solution may not be effective Some or all of the system's data comes from existing databases. For security reasons, only a few Select SQL (or stored procedures) are provided to the development team to obtain the required data, and the specific table structure is not disclosed\ The development specification requires that all database operations involving business logic must be implemented by stored procedures at the database layer. (Most banks have such restrictions) The system has a huge amount of data processing and extremely demanding performance requirements, which often means that we must use highly optimized SQL statements (or stored procedures) to achieve the system performance design indicators\ N2.iBATIS for small and simple systems: very suitable iBATIS itself is small and simple iBATIS does not impose any impact on the design of existing applications or database structures iBATIS is very suitable for systems with growth trends 3. iBATIS for large and enterprise level systems: designed for it iBATIS has certain features that enable it to efficiently process large datasets iBATIS allows you to establish mapping relationships from objects to databases in multiple ways MySpace has been applied 4. Used for any type of relational database:\ Application database Enterprise database Private database Legacy database Simplicity Performance Clear division of labor Portability: Java,. Net or other Open source 5. When should iBATIS not be used when you can always have full control When your application requires fully dynamic SQL When you are not using relational databases When iBATIS is not working

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