C#製作鷹眼的詳細全過程(帶注釋)執行個體代碼

axMapControl1是主控制項，axMapControl2是鷹眼控制項

要看清楚事件響應

1.鷹眼地圖資源載入

複製代碼 代碼如下:privatevoid axMapControl1_OnMapReplaced(object sender, IMapControlEvents2_OnMapReplacedEvent e)

{

//當主地圖顯示控制項的地圖更換時，鷹眼中的地圖也跟隨更換

axMapControl2.LoadMxFile(axMapControl1.DocumentFilename);

axMapControl2.Extent = axMapControl2.FullExtent;

}

2.繪製鷹眼矩形框複製代碼 代碼如下:private void axMapControl1_OnExtentUpdated(object sender, IMapControlEvents2_OnExtentUpdatedEvent e)

{

// 得到新範圍

IEnvelope pEnv = (IEnvelope)e.newEnvelope;

IGraphicsContainer pGra = axMapControl2.Map as IGraphicsContainer;

IActiveView pAv = pGra as IActiveView;

//在繪製前，清除axMapControl2中的任何圖形元素

pGra.DeleteAllElements();

IRectangleElement pRectangleEle = new RectangleElementClass();

IElement pEle = pRectangleEle as IElement;

pEle.Geometry = pEnv;

//設定鷹眼圖中的紅線框

IRgbColor pColor = new RgbColorClass();

pColor.Red = 255;

pColor.Green = 0;

pColor.Blue = 0;

pColor.Transparency = 255;

//產生一個線符號對象

ILineSymbol pOutline = new SimpleLineSymbolClass();

pOutline.Width = 2;

pOutline.Color = pColor;

//設定顏色屬性

pColor = new RgbColorClass();

pColor.Red = 255;

pColor.Green = 0;

pColor.Blue = 0;

pColor.Transparency = 0;

//設定填充符號的屬性

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. 實現互動複製代碼 代碼如下: private void axMapControl2_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)

{

IPoint pPt=new PointClass ();

pPt.PutCoords (e.mapX ,e.mapY );

//改變主控制項的視圖範圍

axMapControl1 .CenterAt (pPt );

}