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


namespace DB1
{
    public partial class Form1 : Form
    {
        MySqlConnection cm;
        int i = 0;
        DateTime dateValue;
        //string MySQLFormatDate = dateValue.ToString("yyyy-MM-dd");



        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            try
            {

                cm = new MySqlConnection();
                cm.ConnectionString = "server=127.0.0.1;uid=neuro;pwd=123;database=neuro;";
                cm.Open();
                MessageBox.Show("Connected to the DataBase");
            }
            catch (MySql.Data.MySqlClient.MySqlException ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        //adicionar dados
        private void button1_Click(object sender, EventArgs e)
        {

            MySqlCommand cmd = new MySqlCommand();
            //cmd.CommandText = "INSERT INTO testes (data,nota) VALUES (@data,@nota)";
           cmd.CommandText = "UPDATE testes SET data = " + data.Text + " WHERE disciplina='" + disciplina.Text + "'" ;
            cmd.CommandType = CommandType.Text;
                    cmd.Connection = cm;
            //  " DELETE FROM `testes` WHERE `testes`.`id` = 12"?

            //cmd.Parameters.AddWithValue("@data", data.Text);
              //      cmd.Parameters.AddWithValue("@nota", notas.Text);
                    cmd.ExecuteNonQuery();
        }

        //recolher dados
        private void button2_Click(object sender, EventArgs e)
        {


            MySqlCommand cmd = new MySqlCommand();
            cmd.CommandText = "SELECT disciplina, nota, data FROM testes";// WHERE nota = 20
            cmd.CommandType = CommandType.Text;
            cmd.Connection = cm;
            MySqlDataReader rdr = cmd.ExecuteReader();
            while (rdr.Read())
            {

                dataGridView1.Rows.Add();
                dataGridView1.Rows[i].Cells[0].Value = rdr[0];
                dataGridView1.Rows[i].Cells[1].Value = rdr[1];


                i += i + 1;
            }
            rdr.Close();


        }


        //updates na tabela
        private void button3_Click(object sender, EventArgs e)
        {
            MySqlCommand cmd = new MySqlCommand();
            cmd.CommandText = "UPDATE testes SET disciplina='Ingles' WHERE disciplina='Portugues'";
            cmd.CommandType = CommandType.Text;
            cmd.Connection = cm;
            cmd.ExecuteNonQuery();
        }

        private void data_TextChanged(object sender, EventArgs e)
        {

        }

        private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
        {
            dateValue.ToString;
        }
    }
}