C# ArcEngine 实现点击要素高亮并弹出其属性

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）：

                         ITopologicalOperator pTopo;
                         IGeometry pGeometry;
                         IFeature pFeature;
                         IFeatureLayer pFeatureLayer;
                         IFeatureCursor pCursor;
                         ISpatialFilter pFilter;
                         DataTable dataTable;

                         for (int i = ; i < axMapControl1.Map.LayerCount; i++)
                         {

                             pPoint = new PointClass();
                             pPoint.PutCoords(e.mapX, e.mapY);
                             pTopo = pPoint as ITopologicalOperator;                             double m_Radius = ;
                             pGeometry = pTopo.Buffer(m_Radius);
                             if (pGeometry == null)
                                 continue;
                             axMapControl1.Map.SelectByShape(pGeometry, null, true);//第三个参数为是否只选中一个
                             axMapControl1.Refresh(esriViewDrawPhase.esriViewGeoSelection, null, null); //选中要素高亮显示
                             pFilter = new SpatialFilterClass();
                             pFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;
                             pFilter.Geometry = pGeometry;
                             pFeatureLayer = axMapControl1.Map.get_Layer(i) as IFeatureLayer;
                             pCursor = pFeatureLayer.Search(pFilter, false);
                             pFeature = pCursor.NextFeature();
                             string fieldName;
                             if (pFeature != null)
                             {
                                 if (Application.OpenForms["otherQueryForm"] == null)
                                 {
                                     otherqueryform = new otherQueryForm();
                                     otherqueryform.Show();
                                 }
                                 else
                                 {
                                     Application.OpenForms["otherQueryForm"].Show();
                                 }//这里主要控制子窗体不会重复弹出
                                 dataTable = new DataTable();
                                 for (int k = ; k < ; k++)
                                 {
                                     if (k == )
                                     {
                                         dataTable.Columns.Add("属性");
                                     }
                                     if (k == )
                                     {
                                         dataTable.Columns.Add("值");
                                     }
                                 }
                                 DataRow datarow;
                                 for (int j = ; j < pFeature.Fields.FieldCount; j++)
                                 {
                                     datarow = dataTable.NewRow();
                                     for (int m = ; m < ; m++)
                                     {
                                         if (m == )
                                         {
                                             fieldName = pFeature.Fields.get_Field(j).Name;
                                             datarow[m] = fieldName;
                                         }
                                         if (m == )
                                         {
                                             if (pFeature.Fields.get_Field(j).Name == "Shape")
                                             {
                                                 if (pFeature.Shape.GeometryType == ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPoint)
                                                 {
                                                     datarow[m] = "点";
                                                 }
                                                 if (pFeature.Shape.GeometryType == ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline)
                                                 {
                                                     datarow[m] = "线";
                                                 }
                                                 if (pFeature.Shape.GeometryType == ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolygon)
                                                 {
                                                     datarow[m] = "面";
                                                 }
                                             }
                                             else
                                             {
                                                 datarow[m] = pFeature.get_Value(j).ToString();
                                             }
                                         }
                                     }
                                     dataTable.Rows.Add(datarow);
                                 }
                                 otherqueryform.dataGridView1.DataSource = dataTable;
                                 otherqueryform.layerName_dev.Text = pFeatureLayer.Name;
                                 otherqueryform.dataGridView1.Refresh();
                                 pFeature = null;
                                 break;
                             }                         }