private ESRI.ArcGIS.Geometry.IEnvelope mainInvelope = null; //(主视图上)

 public ESRI.ArcGIS.Geometry.IEnvelope MainInvelopeValue {

     get {

     return mainInvelope;

     }

 }

 private bool startMainInvelope = false; //标识在主视图上画轮廓矩形,以进行该范围内点查询.

 if ( == e.button && startMainInvelope) {   //在主视图上画轮廓.

     mainInvelope = mapCtrl_main.TrackRectangle();

     try {

         if (!mainInvelope.IsEmpty)

         Engine.App_Code.Draw.DrawSymbol(mapCtrl_main.Map, mainInvelope);

     }

     catch (System.Exception ex) {

         MessageBox.Show(ex.Message);

     }

 }

 /// <summary>

         /// 画轮廓.

         /// </summary>

         /// <param name="sender"></param>

         /// <param name="e">根据IEnvelope对象画轮廓.</param>

         public static void DrawSymbol(ESRI.ArcGIS.Carto.IMap map, ESRI.ArcGIS.Geometry.IEnvelope e) {

             ESRI.ArcGIS.Carto.IGraphicsContainer hawkGC = (ESRI.ArcGIS.Carto.IGraphicsContainer)map;

             ESRI.ArcGIS.Carto.IActiveView aView = (ESRI.ArcGIS.Carto.IActiveView)hawkGC;

             hawkGC.DeleteAllElements();

             ESRI.ArcGIS.Carto.IElement recEle = (ESRI.ArcGIS.Carto.IElement)new ESRI.ArcGIS.Carto.RectangleElementClass();

             recEle.Geometry = e;

             ESRI.ArcGIS.Display.ISimpleLineSymbol outLine = new ESRI.ArcGIS.Display.SimpleLineSymbolClass();

             outLine.Color = ColorPaint(, );

             outLine.Width = ;

             //填充样式.

             ESRI.ArcGIS.Display.ISimpleFillSymbol fillSym = new ESRI.ArcGIS.Display.SimpleFillSymbolClass();

             fillSym.Color = ColorPaint(, );

             fillSym.Outline = outLine;

             ESRI.ArcGIS.Carto.IFillShapeElement fillShape = (ESRI.ArcGIS.Carto.IFillShapeElement)recEle;

             fillShape.Symbol = fillSym;

             hawkGC.AddElement((ESRI.ArcGIS.Carto.IElement)fillShape, );

             aView.PartialRefresh(ESRI.ArcGIS.Carto.esriViewDrawPhase.esriViewGraphics, null, null);

         }

 /// <summary>

         /// 根据图层名获取图层.

         /// </summary>

         /// <param name="map"></param>

         /// <param name="layerName">图层名称.</param>

         /// <returns></returns>

         public static ESRI.ArcGIS.Carto.ILayer GetLayerByName(ESRI.ArcGIS.Carto.IMap map, string layerName) {

             ESRI.ArcGIS.Carto.IEnumLayer enunLayer = map.get_Layers(null, false);

             enunLayer.Reset();

             ESRI.ArcGIS.Carto.ILayer resultLayer = null;

             while ((resultLayer = enunLayer.Next()) != null) {

                 if (resultLayer.Name.Equals(layerName)) {

                     break;

                 }

             }

             return resultLayer;

         }

 using System;

 using System.Collections.Generic;

 using System.ComponentModel;

 using System.Data;

 using System.Drawing;

 using System.Linq;

 using System.Text;

 using System.Windows.Forms;

 namespace Engine {

     public partial class fQueryInvelopePoints : Form {

         private ESRI.ArcGIS.Carto.IMap map = null;

         private fMain fMain = null;

         public fQueryInvelopePoints(fMain fMain, ESRI.ArcGIS.Carto.IMap map) {

             this.fMain = fMain;

             this.map = map;

             InitializeComponent();

         }

         /// <summary>

         /// 查询指定矩形范围内的点要素.

         /// </summary>

         /// <param name="envelope">指定的矩形范围.</param>

         /// <param name="featureClass">待查询的要素.</param>

         /// <returns>返回结果的游标</returns>

         public ESRI.ArcGIS.Geodatabase.IFeatureCursor GetAllFeaturesFromPointSearchInGeoFeatureLayer(ESRI.ArcGIS.Geometry.IEnvelope envelope, ESRI.ArcGIS.Geodatabase.IFeatureClass featureClass) {

             if (featureClass == null)

                 return null;

             ESRI.ArcGIS.Geodatabase.ISpatialFilter spatialFilter = new ESRI.ArcGIS.Geodatabase.SpatialFilterClass();

             spatialFilter.Geometry = envelope;

             spatialFilter.SpatialRel = ESRI.ArcGIS.Geodatabase.esriSpatialRelEnum.esriSpatialRelEnvelopeIntersects;

             spatialFilter.GeometryField = featureClass.ShapeFieldName;

             return featureClass.Search(spatialFilter, false);

         }

         private void fQueryInvelopePoints_Load(object sender, EventArgs e) {

             Engine.App_Code.Layer_Assist.InitLayers(map, cbox_layer);

         }

         private void btn_query_Click(object sender, EventArgs e) {

             lsbox.Items.Clear();    //清空原始数据.

             ESRI.ArcGIS.Carto.ILayer lyr = Engine.App_Code.Layer_Assist.GetLayerByName(map, cbox_layer.Text);

             if (lyr is ESRI.ArcGIS.Carto.IFeatureLayer) {   //矢量数据.

                 ESRI.ArcGIS.Carto.IFeatureLayer fLyr = (ESRI.ArcGIS.Carto.IFeatureLayer)lyr;

                 ESRI.ArcGIS.Geometry.IEnvelope selEnvelope = fMain.MainInvelopeValue;

                 //获取矩形范围内的要素.

                 ESRI.ArcGIS.Geodatabase.IFeatureCursor fCur = GetAllFeaturesFromPointSearchInGeoFeatureLayer(selEnvelope, fLyr.FeatureClass);

                 ESRI.ArcGIS.Geodatabase.IFeatureClass fc = fLyr.FeatureClass;

                 ESRI.ArcGIS.Geodatabase.IFeature f = null;

                 string v = "";

                 string k = "";

                 k = "name";

                 fMain.mapCtrl_main.ActiveView.Refresh();    //高亮显示前.

                 try {

                     while ((f = fCur.NextFeature()) != null) {

                         map.SelectFeature(fLyr, f); //高亮显示.

                         v = Convert.ToString(f.get_Value(f.Fields.FindField("name")));

                         lsbox.Items.Add(k + " : " + v);

                     }

                 }

                 catch (System.Exception ex) {

                     MessageBox.Show(ex.Message + "不支持查询的图层或查询字段错误:NAME");

                 }

                 fMain.mapCtrl_main.ActiveView.Refresh();    //高亮显示后.

             }

         }

     }

 }

 if (mainInvelope == null || mainInvelope.IsEmpty) {

     MessageBox.Show("画轮廓为空");

     return;

 }

 if (fInvelopePoints == null)

     fInvelopePoints = new fQueryInvelopePoints(this, mapCtrl_main.Map);

 fInvelopePoints.FormClosed += (s, ea) => {

     fInvelopePoints = null;

 };

 fInvelopePoints.Show(this);

 //查询窗口.

 private fQueryInvelopePoints fInvelopePoints = null;