I collected a database helper class, the basic can be applied to the current common database, some classes have been applied in the project has a good practical

数据库操作类\DataBaseHelper.cs
............\DBHelperNH.cs
............\DbHelperOleDb.cs
............\DbHelperOracle.cs
............\DbHelperSQL.cs
............\DbHelperSQL2.cs
............\DbHelperSQLP.cs
............\OracleHelper.cs
............\SQLHelper.cs
数据库操作类

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