private void Measure(SuperMap.Web.Core.Geometry geo)
{
MeasureParameters parameters = new MeasureParameters { Geometry = geo, Unit = Unit.Kilometer };
MeasureService measureService = new MeasureService(url);
measureService.ProcessAsync(parameters);
measureService.ProcessCompleted += new EventHandler<MeasureEventArgs>(measureService_ProcessCompleted);
measureService.Failed += new EventHandler<ServiceFailedEventArgs>(measureService_Failed);
}