private void videoList_ItemActivate(object sender, EventArgs e)
        {
            if (StreamServerProxy == null)
            {
                return;
            }
            if (this.videoList.SelectedItems.Count == 0)
            {
                return;
            }
            if (string.IsNullOrEmpty(VideoPlayer.ExePath))
            {
                MessageBox.Show("请安装vlc播放器");
                return;
            }

            ListViewItem item = this.videoList.SelectedItems[0];

            IsPlaying = true;


            ReceiveVideoStream();

            StreamServerProxy.StreamVideo(item.Tag as string);



            bindPiclist();
        }