c# access操作类

using System;
using System.Data;
using System.Data.OleDb;
using System.Configuration;
using System.Windows.Forms;

public class AccConnDb{

    private OleDbConnection conn;
    private OleDbDataAdapter oda = new OleDbDataAdapter();
    private OleDbCommand cmd;
    private DataSet myds = new DataSet();
    
    string conString = System.Configuration.ConfigurationManager.AppSettings["conStr"]; 

    public AccConnDb(){ 
        //conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Application.StartupPath + @"/db/dbtest.mdb");
        conn = new OleDbConnection(connstr);
    }

    //执行select语句返回查询结果
    public DataSet getDS(string strSQL){
        myds = new DataSet();
        oda = new OleDbDataAdapter(strSQL, conn);
        oda.Fill(myds);
        return myds;
    }

    //执行insert update delete 
    public bool setDS(string strSQL){
        conn.Open();
        cmd = new OleDbCommand(strSQL, conn);
        cmd.ExecuteNonQuery();
        conn.Close();
        return true;
    }

}