How to autoplay next song/video in WMP in C# with mysql

Question

How do I play the next song/video from the listBox automatically

the path is inside the listBox the problem is how do I get to play the song/video in it

Here is my code:

namespace JustSingSystem
{
    public partial class Karaoke : Form
    {
        MySqlConnection connection = new MySqlConnection("datasource=localhost;port=3306;username=root;password=seven7");
        MySqlCommand command;
        MySqlDataReader mdr;
        public Karaoke()
        {
            InitializeComponent();
        }


        private void button8_Click(object sender, EventArgs e)
        {
            try
            {
                connection.Open();
                string selectQuery = "SELECT * FROM justsing.songsinfo WHERE songnumber=" + int.Parse(textBox1.Text);
                command = new MySqlCommand(selectQuery, connection);
                mdr = command.ExecuteReader();
                if (mdr.Read())
                {
                    textBox2.Text = mdr.GetString("song");
                    textBox3.Text = mdr.GetString("song");

                }
                else
                {
                    textBox2.Text = "";
                    textBox1.Text = "";
                    MessageBox.Show("No Data For This Id");
                }
                connection.Close();
                listBox1.Items.Add(this.textBox2.Text);

            }

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


        private void button1_Click(object sender, EventArgs e)
        {
            SoundPlayer splayer = new SoundPlayer(@"C:\Users\Tocz\Desktop\Macromedia\test.wav");
            splayer.Play();
        }

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {

        }

        private void button13_Click(object sender, EventArgs e)
        {
            connection.Open();
            string selectQuery = "SELECT * FROM justsing.songsinfo WHERE songnumber=" + int.Parse(textBox1.Text);
            command = new MySqlCommand(selectQuery, connection);
            mdr = command.ExecuteReader();
            if (mdr.Read())
            {
                textBox2.Text = mdr.GetString("song");

            }
            else
            {
                textBox2.Text = "";
                textBox1.Text = "";
                MessageBox.Show("No Data For This Id");
            }
            connection.Close();

            axWindowsMediaPlayer1.URL = "" + textBox2.Text;
        }

        private void axWindowsMediaPlayer1_PlayStateChange(object sender, AxWMPLib._WMPOCXEvents_PlayStateChangeEvent e)
        {
             {
        if (axWindowsMediaPlayer1.playState == WMPLib.WMPPlayState.wmppsMediaEnded)
        {
            timer1.Interval = 100;
            timer1.Enabled = true;
        }
        }
        }



        private void timer1_Tick(object sender, EventArgs e)
        {
            string path = textBox2.Text;
            if (listBox1.SelectedIndex < path.Length - 1)
            {
                listBox1.SelectedIndex++;
                timer1.Enabled = false;
                axWindowsMediaPlayer1.Ctlcontrols.play();
            }
            else
            {
                listBox1.SelectedIndex = 0;
                timer1.Enabled = false;
            }
        }

        }
    }