Introduction - If you have any usage issues, please Google them yourself
This procedure uses the three-tier architecture+ abstract factory design pattern+ Linq implementation, currently only do the Access and SQL Server, the default database to Access, to replace the database can only modify web.config. Part in the SQL Server database using Linq technology operations, with the xml editor to open XmxCms.dbml file you can see the SQL Server database connection string, follow the practical situation.