AE中Identify查询工具的实现

 主要实现点击查询并闪烁显示，并把查询要素的信息通过DataGridView显示出来，主要用到的接口：

IIdentity、IArray、IIdentifyObj、IFeatureObj、IRowIdentifyObject、IFeature

代码：

                IGroupLayer pGroupLayer = new GroupLayerClass();
                for (int i = 0; i < axMapControl1.Map.LayerCount; i++)
                {
                    pGroupLayer.Add(axMapControl1.Map.get_Layer(i));
                }
                IIdentify pIdentify = pGroupLayer as IIdentify;
                IPoint point = new PointClass();
                point.PutCoords(e.mapX, e.mapY);
                

                IArray pID = pIdentify.Identify(point);
                IFeatureIdentifyObj pFeatIdentifyObj;
                IIdentifyObj pIdentifyObj;
                
                pFeatIdentifyObj = pID.get_Element(0) as IFeatureIdentifyObj;
                pIdentifyObj = pFeatIdentifyObj as IIdentifyObj;
                pIdentifyObj.Flash(axMapControl1.ActiveView.ScreenDisplay);
                IRowIdentifyObject pRowObject = pFeatIdentifyObj as IRowIdentifyObject;
                IFeature pFeature = pRowObject.Row as IFeature;
               
                DataTable pDatatable = new DataTable();
                for (int i = 0; i < pFeature.Fields.FieldCount; i++) //加载每一列字段的名字
                {
                    pDatatable.Columns.Add(pFeature.Fields.get_Field(i).Name);
                }
                DataRow pDataRow = pDatatable.NewRow();           //加载查询要素的信息
                for (int i = 0; i < pFeature.Fields.FieldCount; i++)
                {
                    pDataRow[i] = pFeature.get_Value(i);
                }
                pDatatable.Rows.Add(pDataRow);  //Iden是另外设置的属性窗口
                DataGridView pDataGridView = Iden.Get_DataGridView;
                pDataGridView.DataSource = pDatatable;
                Iden.Show();