void ucm_DeleteClosed(object sender, EventArgs e)
 {
     if (ucmDel.DialogResult.Value)
     {
         MusicInfo mi = lbLocalMusicList.SelectedItem as MusicInfo;
         CommHelper.DeleteLocalSignAndMusic(mi);
         ucmDel.Show("删除成功!");
         StopRelaPty(true);
         ReloadLocalMusicList();
         ucmDel.Closed -= new EventHandler(ucm_DeleteClosed);
     }
     this.UpdateLayout();
 }