public void FormPlay(string path) { if (vlc_player_ == null) { vlc_player_ = new VlcPlayer(pluginPath); } if (!string.IsNullOrEmpty(path)) { vlc_player_.PlayFile(path); trackBar1.SetRange(0, (int)vlc_player_.Duration()); trackBar1.Value = 0; timer1.Start(); is_playinig_ = true; this.Activate(); button2.Text = "暂停"; } }