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 MySQL_Sdelki
{
    public partial class Form1 : Form
    {
        string connection = "datasource=localhost;" + "database=dogovors;" + "username=root;" + "password=";
        public Form1()
        {
            InitializeComponent();
         

        }

        private void button1_Click(object sender, EventArgs e)
        {
            string con = connection;  //= "datasource=localhost;" + "database=dogovors;" + "username=root;" + "password=";
            string comand = "select * from tablename";
            DataTable dt = new DataTable();
            using (MySqlConnection con = new MySqlConnection())
            {
                con.ConnectionString = connection;
                MySqlCommand com = new MySqlCommand(comand, con);
                try
                {
                    con.Open();
                    using (MySqlDataReader dr = com.ExecuteReader())
                    {
                        if (dr.HasRows)
                        {
                            dt.Load(dr);
                        }
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.ToString());
                }
                con.Close();
            }
            dataGridView1.DataSource = dt;
        }
    }
}