ArcGIS Engine实现点选要素

本文主要是介绍ArcGIS Engine实现点选要素，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

大致分为三步

• 获得点击位置的坐标
• 根据坐标生成缓冲区
• 查询与缓冲区相交的要素

在AxMapControl的点击事件获得点击位置并转换为坐标

IPoint point = axMapControl1.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(MousePosition.X, MousePosition.Y);

获得查询的目标图层

ILayer pLayer = axMapControl1.get_Layer(5);

执行查询操作

List<IFeature> pFeaturesList = getPointSelect(point, pLayer as IFeatureLayer, 2);

根据点击位置进行查询的函数

        private List<IFeature> getPointSelect(IPoint pPoint,IFeatureLayer pFeatureLayer,double pRadius){List<IFeature> pSelectedFeatureList = new List<IFeature>();  //返回要素类ITopologicalOperator pTop = pPoint as ITopologicalOperator;IGeometry pGeometry = pTop.Buffer(pRadius);  //建立缓冲区ISpatialFilter pSpatialFilter = new SpatialFilterClass();  //空间查询模块pSpatialFilter.Geometry = pGeometry;  //查询内容pSpatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;  //求交IFeatureCursor pFeatureCursor = pFeatureLayer.FeatureClass.Search(pSpatialFilter, false);IFeature pFeature = pFeatureCursor.NextFeature();while (pFeature != null){pSelectedFeatureList.Add(pFeature);pFeature = pFeatureCursor.NextFeature();}return pSelectedFeatureList;}

 

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