using MySql.Data.MySqlClient; 

　　　　　　　MySqlDataReader rdr = null;            MySqlConnection conn = null;            MySqlCommand cmd = null;            string cs = null;            string query = null;            try            {                cs = "server=localhost;port=3307;userid=root;password=1234;database=web";                conn = new MySqlConnection(cs);                conn.Open();                MessageBox.Show("connected");                query = "select * from service1";                cmd = new MySqlCommand(query, conn);                rdr = cmd.ExecuteReader();                while (rdr.Read())                {                    string s = rdr.GetInt32(0) + ": " + rdr.GetString(1);                    MessageBox.Show(s);                }                conn.Close();            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }