//取消测算，移除附加图层
private void Edit_Calc_Cancle_Click(object sender, RoutedEventArgs e)
{
if (mAssistView != null)
{
this.MapGrid.Children.Remove(mAssistView);
listLayer.Remove(mAssistView);
}
mAssistView = null;
}
//测算面积
private void Edit_Calc_Area_Click(object sender, RoutedEventArgs e)
{
if (mAssistView != null && !mAssistView.GetAction().GetType().ToString().Equals(CalAreaAction.getType()))
{
MapGrid.Children.Remove(mAssistView);
listLayer.Remove(mAssistView);
mAssistView = null;
}
if (mAssistView == null)
{
mAssistView = new AssistView(new CalAreaAction());
MapGrid.Children.Add(mAssistView);
listLayer.Add(mAssistView);
}
}