C#,arcengine制作鹰眼全过程（带注释）

C#制作鹰眼全过程（带注释）

axMapControl1是主控件

要看清楚事件响应

1.鹰眼地图资源载入

private void 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 setMap2(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);

}

private void axMapControl1_OnExtentUpdated(object sender, IMapControlEvents2_OnExtentUpdatedEvent e)

{
setMap2(e);
}
3.互动

private void axMapControl2_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)
{
//by yl 改进 landgis@126.co
IRubberBand pBand = new RubberEnvelopeClass();

IGeometry pGeometry = pBand.TrackNew(axMapControl2.ActiveView.ScreenDisplay, null);

if (pGeometry.IsEmpty)
{
IPoint pPt = new PointClass();
pPt.PutCoords(e.mapX, e.mapY);
//改变主控件的视图范围
axMapControl1.CenterAt(pPt);
}
else
{
axMapControl1.Extent = pGeometry.Envelope;
axMapControl1.ActiveView.Refresh();

}

}

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