C#制作鹰眼的详细全过程(带注释)实例代码

axmapcontrol1是主控件，axmapcontrol2是鹰眼控件

要看清楚事件响应

 

1.鹰眼地图资源载入

privatevoid axmapcontrol1_onmapreplaced(object sender, imapcontrolevents2_onmapreplacedevent e)

        {

            //当主地图显示控件的地图更换时，鹰眼中的地图也跟随更换

            axmapcontrol2.loadmxfile(axmapcontrol1.documentfilename);

            axmapcontrol2.extent = axmapcontrol2.fullextent;

        }

2.绘制鹰眼矩形框

private void axmapcontrol1_onextentupdated(object sender, imapcontrolevents2_onextentupdatedevent e)

        {

 

            // 得到新范围

            ienvelope penv = (ienvelope)e.newenvelope;

 

            igraphicscontainer pgra = axmapcontrol2.map as igraphicscontainer;

            iactiveview pav = pgra as iactiveview;

            //在绘制前，清除axmapcontrol2中的任何图形元素

            pgra.deleteallelements();

 

            irectangleelement prectangleele = new rectangleelementclass();

            ielement pele = prectangleele as ielement;

            pele.geometry = penv;

 

            //设置鹰眼图中的红线框

            irgbcolor pcolor = new rgbcolorclass();

            pcolor.red = 255;

            pcolor.green = 0;

            pcolor.blue = 0;

            pcolor.transparency = 255;

            //产生一个线符号对象

            ilinesymbol poutline = new simplelinesymbolclass();

            poutline.width = 2;

            poutline.color = pcolor;

 

            //设置颜色属性

            pcolor = new rgbcolorclass();

            pcolor.red = 255;

            pcolor.green = 0;

            pcolor.blue = 0;

            pcolor.transparency = 0;

            //设置填充符号的属性

            ifillsymbol pfillsymbol = new simplefillsymbolclass();

            pfillsymbol.color = pcolor;

            pfillsymbol.outline = poutline;

 

            ifillshapeelement pfillshapeele = pele as ifillshapeelement;

            pfillshapeele.symbol = pfillsymbol;

            pgra.addelement((ielement)pfillshapeele, 0);

            pav.partialrefresh(esriviewdrawphase.esriviewgraphics, null, null);

        }
 

3. 实现互动

   private void axmapcontrol2_onmousedown(object sender, imapcontrolevents2_onmousedownevent e)

        {

            ipoint ppt=new pointclass ();

            ppt.putcoords (e.mapx ,e.mapy );

            //改变主控件的视图范围

            axmapcontrol1 .centerat (ppt );

        }