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

namespace DataUpdate06
{
    public partial class Form1 : Form
    {
        OleDbConnection thisConnection;
        OleDbDataAdapter thisAdapter;
        DataSet thisDataSet;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            thisConnection =
                new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\360\Programs_managedVCSharp\rnrbooks.mdb");
            thisConnection.Open();
            thisAdapter =
                new OleDbDataAdapter("SELECT ISBN, Title, Author FROM Books", thisConnection);
            thisDataSet = new DataSet();
            thisAdapter.Fill(thisDataSet, "Books");
            foreach (DataRow theRow in thisDataSet.Tables["Books"].Rows)
            {
                displayTextBox.Text +=
                    theRow["ISBN"] +"\t" + theRow["Title"] + "\t" + theRow["Author"] + "\r\n";
            }
        }

        private void buttonChange_Click(object sender, EventArgs e)
        {
            OleDbCommandBuilder thisBuilder = new OleDbCommandBuilder(thisAdapter);
            thisAdapter.Fill(thisDataSet, "Books");
            int rownum = int.Parse(recnumTextBox.Text);
            thisDataSet.Tables["Books"].Rows[rownum]["ISBN"] = newISBNTextBox.Text;
            thisDataSet.Tables["Books"].Rows[rownum]["Title"] = newtitleTextBox.Text;
            thisDataSet.Tables["Books"].Rows[rownum]["Author"] = newAuthorTextBox.Text;
            thisAdapter.Update(thisDataSet, "Books");  //Without CommandBuilder this would fail
            labelChangeMade.Text = "The change was made";
            thisConnection.Close();
        }
    }
}