private void btnPlay_Click(object sender, EventArgs e) { try { curOper = Oper.AgainPlay; if (myPlay == null) { StartPlay(); } else if (myPlay != null && myPlay.CurentState == PlayState.Run) { myPlay.Pause(); SetButton(PlayState.Pause); } else if (myPlay != null && myPlay.CurentState == PlayState.Pause) { myPlay.ContinueRun(); SetButton(PlayState.Run); } } catch { PlayCompleted(this, new EventArgs()); } }