1。SQL.NET 数据提供程序
SqlCommand sqlcon = new SqlCommand("select * from blus",con);
SqlCommand sqlcon = new SqlCommand("select * from blus",con);
2. OleDb.NET 数据提供程序
OleDbCommand adoCom= new OleDbCommand("select * from blus",con);
注意：这里别忘记写 ,con