c# - Sounds play with delay

Question

here is my code:

        MediaPlayer player = new System.Windows.Media.MediaPlayer();

       bool playing = false;

        bool _bKeyIsDown = false;

        protected override void OnKeyDown(KeyEventArgs e)
        {
            if (_bKeyIsDown) return;
            _bKeyIsDown = true;
            // play sound;
            base.OnKeyDown(e);
        } 
        protected override void OnKeyUp(KeyEventArgs e) 
        { 
            base.OnKeyUp(e);
            _bKeyIsDown = false;
        }

        private void Window_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.D1)
            {
                if (label5.Text == "Waiting 01.wav")
                {
                    MessageBox.Show("No beat loaded");
                    return;
                }
                    pictureBox6.Image = Form1.Properties.Resources.white_square_button;
                    try
                    {
                        playing = true;
                        player.Open(new Uri(label37.Text));
                        player.Volume = (double)trackBar4.Value / 100;
                        player.Play();
                    }
                    catch (FileNotFoundException)
                    {
                        MessageBox.Show("File has been moved." + "\n" + "Please relocate it now!");
                    }
            }
}

        private void Window_KeyUp(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.D1)
            {
                pictureBox6.Image = Form1.Properties.Resources.black_square_button;
                player1.Stop();
                player1.Close();
                playing = false;
            }

This what makes is to play a sound while key is down, but the problem is that when you release that key and press another one the sound delays and if you press 2 keys at the same time it only play the first one you pressed.

If you remove if (_bKeyIsDown) return; it does the trick but the sound won't play at its full length.

Is there a way to fix this problem? Thanks!

Answer 1

如果它只是播放并停止 1 个声音，只需执行 KeyDown 事件并使用 bool 来切换：

        bool playing = false;
        private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.D1)
            {
                if (!playing)
                {

                    player.Open(new Uri(yourURI));
                    player.Play();
                    playing = true;
                }
                else
                {
                    player.Stop();
                    playing = false;
                }
            }
        }

编辑：

那么我可以建议您创建一个包含您需要的所有声音的字典，如下所示：

        Dictionary<Keys, Uri> sounds = new Dictionary<Keys, Uri>()
        {
            {Keys.A,new Uri(@"C:\..\..\youraudiofile.mp3")},
            {Keys.B,new Uri(@"C:\..\yourotheraudiofile.wma")}
        };

并创建一个列表以保留对媒体播放器的引用：

List<MediaPlayer> myplayers = new List<MediaPlayer>();

然后仅在 KeyDown 事件中（删除 onKeyDown 和 keyup ）：

        private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
               foreach (MediaPlayer m in myplayers)
               {
                  m.Stop();
               }
               return;
            }

            if (sounds.ContainsKey(e.KeyCode))
            {
                MediaPlayer mp = new MediaPlayer();
                mp.Open(sounds[e.KeyCode]);
                mp.Play();
            }
        }