自己写了一个数据库操作的类,看看这段我写的对不对啊 ???using System;
using System.Data;
using System.Data.OleDb;
namespace yuna
{
public class yunaDB
{
public yunaDB()
{ } // 自己写了一个数据库操作的类,看看这段我写的对不对啊 ???
public OleDbDataReader ExecuteReader(string connectionString, string commandText)
{
OleDbConnection objConnection = new OleDbConnection(connectionString); OleDbCommand objCommand = new OleDbCommand(commandText,objConnection); objConnection.Open(); return objCommand.ExecuteReader();
// 返回后,函数就执行完了,那数据库连接怎么关闭呢???
}
}
}
objConnection.close();
return i;
返回dataset or datatable