How to fetch data from MS Access to list view??

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.OleDb;
namespace Listview_display
{
    public partial class Form1 : Form
    {
        string ConnectionString = System.Configuration.ConfigurationSettings.AppSettings["dsn"];
        OleDbCommand com;
        OleDbDataAdapter oledbda;
        string str;
        DataSet ds;
        DataTable dt;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            listView1.Columns.Add("ID", 70, HorizontalAlignment.Center);
            listView1.Columns.Add("GRADE", 70, HorizontalAlignment.Center);
            listView1.View = View.Details;
            listView1.GridLines = true;
            listView1.BackColor = Color.Aqua;
            listView1.ForeColor = Color.Blue;
            OleDbConnection con = new OleDbConnection(ConnectionString);
            con.Open();
            str = "select * from test Query";
            com = new OleDbCommand(str, con);
            oledbda = new OleDbDataAdapter(com);
            ds = new DataSet();
            oledbda.Fill(ds, "test Query");
            con.Close();
            dt = ds.Tables["test Query"];
            int i;
            for (i = 0; i <= dt.Rows.Count - 1; i++)
            {
                listView1.Items.Add(dt.Rows[i].ItemArray[0].ToString());
                listView1.Items[i].SubItems.Add(dt.Rows[i].ItemArray[1].ToString());
            }
        }
    }
}