/// <summary>
 /// 桌面共享
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 void btnDeskShare_Click(object sender, RoutedEventArgs e)
 {
     try
     {
         //桌面共享
         LyncHelper.ShareDesk();
     }
     catch (Exception ex)
     {
         LogManage.WriteLog(this.GetType(), ex);
     }
     finally
     {
     }
 }
        /// <summary>
        /// 开始连接()
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnConnect_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                //判断共享协作页面是否加载
                if (ConversationM.conversationM != null)
                {
                    //是否进入大屏投影
                    switch (this.bigEnterScreen)
                    {
                    case BigEnterScreen.Enter:
                        //断开连接
                        bool canDisConnect = LyncHelper.DisConnectDeskShare();
                        if (!canDisConnect)
                        {
                            //如断开连接失败则及时更新状态
                            this.UpdateState(null);
                        }

                        break;

                    case BigEnterScreen.NoEnter:
                        //开始桌面共享
                        bool canConnect = LyncHelper.ShareDesk();
                        break;

                    default:
                        break;
                    }
                }
            }
            catch (System.Exception ex)
            {
                LogManage.WriteLog(base.GetType(), ex);
            }
            finally
            {
            }
        }