public void CloseView()
        {
            Log.Info("CloseView over.");
            if (m_bDraw)
            {
                //上传画过的图片
                Image  img     = ScreenCapture.captureScreen(0, 0);
                string imgName = DateTime.Now.ToString("yyyyMMdd") + "-" + Global.getSchoolID() + "-" + Global.getClassID() + "-" + DateTime.Now.ToString("HHmmss") + ".jpg";
                string imgDir  = Application.StartupPath + "\\" + DateTime.Now.ToString("yyyyMMdd");
                if (!Directory.Exists(imgDir))
                {
                    Directory.CreateDirectory(imgDir);
                }

                string imgPath = imgDir + "\\" + imgName;
                img.Save(imgPath);
                Common.uploadPicture(imgPath);//drawView
                Common.uploadDrawView(imgName);
            }
            m_bDraw = false;
            this.Close();
        }