Asp.net的多层架构主要是为了解决数据层，逻辑层，表示层等之间的关系。我的做法是这样的：首先建立一个DataCore的基类。基类里面封装了一些低层的数据库的基本操作，比如说数据库联接，调用存储过程等等。在这里面有一个地方值得注意，通过对一个函数的重载可以实现调用不同功能的存储过程。以下代码示例:
| protected int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected )
{ int result; Connection.Open(); SqlCommand command = BuildIntCommand( storedProcName, parameters ); rowsAffected = command.ExecuteNonQuery(); result = (int)command.Parameters["ReturnValue"].Value; Connection.Close(); return result; } protected SqlDataReader RunProcedure(string storedProcName, IDataParameter[] parameters ) { SqlDataReader returnReader; Connection.Open(); SqlCommand command = BuildQueryCommand( storedProcName, parameters ); command.CommandType = CommandType.StoredProcedure; returnReader = command.ExecuteReader(); //Connection.Close(); return returnReader; } protected DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName ) { DataSet dataSet = new DataSet(); Connection.Open(); SqlDataAdapter sqlDA = new SqlDataAdapter(); sqlDA.SelectCommand = BuildQueryCommand( storedProcName, parameters ); sqlDA.Fill( dataSet, tableName ); Connection.Close(); return dataSet; } protected void RunProcedure(string storedProcName, IDataParameter[] parameters, DataSet dataSet, string tableName ) { Connection.Open(); SqlDataAdapter sqlDA = new SqlDataAdapter(); sqlDA.SelectCommand = BuildIntCommand( storedProcName, parameters ); sqlDA.Fill( dataSet, tableName ); Connection.Close(); } |
