实现MapObject放大，缩小，平移，全图常用功能

在axMap1的MouseDownEvent事件里加入下面代码

          MapObjects2.Rectangle rect;     //范围
            switch (axMap1.MousePointer)
            {
                //放大
                case MapObjects2.MousePointerConstants.moZoomIn:
                    {                        
                        rect = axMap1.TrackRectangle(); //得到鼠标拖动范围
                        if (rect == null || rect.Width < 0.00005 || rect.Height < 0.00005)  //如果选择区域很小，可以认为是 单击、点选
                        {
                            rect = axMap1.Extent;
                            rect.ScaleRectangle(0.5);   //设置放大比例
                        }
                        axMap1.Extent = rect;
                        break;
                    }

                //缩小 
                case MapObjects2.MousePointerConstants.moZoomOut:
                    {
                        MapObjects2.Rectangle Tempr;
                        Tempr = axMap1.Extent;
                        rect = axMap1.TrackRectangle();
                        double NewSR;
                        if (rect == null || rect.Width < 0.00005 || rect.Height < 0.00005)
                        {
                            if (axMap1.Extent.Width / rect.Width > axMap1.Extent.Height / rect.Height)
                            {
                                NewSR = axMap1.Extent.Height / rect.Height;
                            }
                            else
                            {
                                NewSR = axMap1.Extent.Width / rect.Width;
                            }
                            Tempr.ScaleRectangle(NewSR);
                        }
                        else
                        {
                            Tempr.ScaleRectangle(2.0);   //设置缩小比率
                        }
                        axMap1.Extent = Tempr;
                        break;
                    }
                //漫游 
                case MapObjects2.MousePointerConstants.moPan:
                    {
                        axMap1.Pan();
                        break;
                    }
           .
           .
           .

这里要设置下鼠标的状态，比如在放大按钮的单击事件下加入：

axMap1.MousePointer = MapObjects2.MousePointerConstants.moZoomIn;   //放大，改变鼠标状态

全图：

axMap1.Extent = axMap1.FullExtent;