using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OleDb;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace provaLetturadb1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnRiempiList_Click(object sender, EventArgs e)
        {            
	    try
            {
                OleDbConnection oc = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=../../Dati/Northwind16.accdb;");
                oc.Open(); //apre la connessione

                string istrSql = "";
                istrSql += "SELECT * FROM Prodotti ORDER BY NomeProdotto";

                OleDbCommand comando = new OleDbCommand(istrSql, oc);
                OleDbDataReader dr = comando.ExecuteReader(); // esegue la query

                listBox1.Items.Clear();
                listBox2.Items.Clear();
                listBox3.Items.Clear();


                while (dr.Read())
                {
                    listBox1.Items.Add(dr[0].ToString());
                    listBox2.Items.Add(dr["NomeProdotto"].ToString());
		    int w = int.Parse(dr["IDProdotto"].ToString()); // IDProdotto è numerico (intero)	
                    listBox3.Items.Add(w);
                }


                dr.Close();  //chiude il datareader
                dr = null;
                oc.Close();  //chiude la connection
                oc = null;
            }
    
            catch (Exception ex)
            {
                MessageBox.Show("Errore " + ex.Message);                
            }