private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                string myConnection = "datasource=localhost;port=3306;username=root;password=easteagle";
                MySqlConnection myConn = new MySqlConnection(myConnection);
                myConn.Open();
                MySqlCommand SelectCommand = new MySqlCommand("select ussername,password from `database`.employeeinfo where ussername ='" + this.username_txt.Text+ "' and password ='" + this.password_txt.Text + "' ;" ,myConn);

                MySqlDataReader myReader = SelectCommand.ExecuteReader();

                int count = 0;

                while (myReader.Read())
                {
                    count++;
                }
                if (count == 1)
                {
                    MessageBox.Show("is good");
                }
                else if (count >1)
                {
                    MessageBox.Show("duplicate password");
                }
                else
                {
                    MessageBox.Show("not good");
                }


                myConn.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
    }