本文是模仿ArcMap里面的Identify（识别）功能，通过点击要素，使其高亮显示并弹出其属性表！本文只做了点击查询！
本文所用的环境为VS2010，AecEngine基于C#语言，界面是用Dev做的，比windows自带的窗体稍微好看点，效果如下：
主要实现代码（在axMapControl1_OnMouseDown下）：
1 ITopologicalOperator pTopo; 2 IGeometry pGeometry; 3 IFeature pFeature; 4 IFeatureLayer pFeatureLayer; 5 IFeatureCursor pCursor; 6 ISpatialFilter pFilter; 7 DataTable dataTable; 8 9 for (int i = 0; i < axMapControl1.Map.LayerCount; i++)10 {11 12 pPoint = new PointClass();13 pPoint.PutCoords(e.mapX, e.mapY);14 pTopo = pPoint as ITopologicalOperator;17 double m_Radius = 1;18 pGeometry = pTopo.Buffer(m_Radius); 19 if (pGeometry == null)20 continue;21 axMapControl1.Map.SelectByShape(pGeometry, null, true);//第三个参数为是否只选中一个22 axMapControl1.Refresh(esriViewDrawPhase.esriViewGeoSelection, null, null); //选中要素高亮显示23 pFilter = new SpatialFilterClass();25 pFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;26 pFilter.Geometry = pGeometry;27 pFeatureLayer = axMapControl1.Map.get_Layer(i) as IFeatureLayer; 28 pCursor = pFeatureLayer.Search(pFilter, false);29 pFeature = pCursor.NextFeature();30 string fieldName;31 if (pFeature != null)33 {34 if (Application.OpenForms["otherQueryForm"] == null)35 {36 otherqueryform = new otherQueryForm();37 otherqueryform.Show();38 }39 else40 {41 Application.OpenForms["otherQueryForm"].Show();42 }//这里主要控制子窗体不会重复弹出44 dataTable = new DataTable();45 for (int k = 0; k < 2; k++)46 {47 if (k == 0)48 {49 dataTable.Columns.Add("属性");50 }51 if (k == 1)52 {53 dataTable.Columns.Add("值");54 }55 }56 DataRow datarow;57 for (int j = 0; j < pFeature.Fields.FieldCount; j++)58 {59 datarow = dataTable.NewRow();60 for (int m = 0; m < 2; m++)61 {62 if (m == 0)63 {64 fieldName = pFeature.Fields.get_Field(j).Name;65 datarow[m] = fieldName;66 }67 if (m == 1)68 {69 if (pFeature.Fields.get_Field(j).Name == "Shape")70 {71 if (pFeature.Shape.GeometryType == ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPoint)72 {73 datarow[m] = "点";74 }75 if (pFeature.Shape.GeometryType == ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline)76 {77 datarow[m] = "线";78 }79 if (pFeature.Shape.GeometryType == ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolygon)80 {81 datarow[m] = "面";82 }83 }84 else85 {86 datarow[m] = pFeature.get_Value(j).ToString();87 }88 }89 }90 dataTable.Rows.Add(datarow);91 }92 otherqueryform.dataGridView1.DataSource = dataTable;93 otherqueryform.layerName_dev.Text = pFeatureLayer.Name;94 otherqueryform.dataGridView1.Refresh();95 pFeature = null;96 break;97 }99 }