void Init() { MapCenter = new Point(121, 31); TemplateWebBrowserChart = new TemplateWebBrowser(WebBrowserChart); BackGroundWorkerDownloadMap.RunWorkerCompleted += BackGroundWorkerDownloadMap_RunWorkerCompleted; BackGroundWorkerDownloadMap.DoWork += BackGroundWorkerDownloadMap_DoWork; TimerRefresh = new System.Windows.Threading.DispatcherTimer(); TimerRefresh.Tick += TimerRefresh_Tick; TimerRefresh.Interval = TimeSpan.FromSeconds(1); }