自己动手实现ArcMap的Identify功能+附源码

       核心代码其实很简单

        /// <summary>

        /// 在指定图层使用指定范围查询结果

        /// </summary>

        /// <param name="identifyLayer">查询图层</param>

        /// <param name="identifyGeom">查询范围</param>

        /// <returns>查询结果</returns>

        private IArray Identify(ILayer identifyLayer, IGeometry identifyGeom)

        {

            //保存结果的变量

            IArray identifyObjs = null;

            //设置查询形状

            if (identifyGeom == null)

            {

                //返回空值

                return identifyObjs;

            }

            //若是点的话做点的缓冲区

            IGeometry hitGeometry = identifyGeom;

            //判断图层类型,设置点击要素

            if (hitGeometry.GeometryType == esriGeometryType.esriGeometryPoint)

            {

                ITopologicalOperator topoOp = identifyGeom as ITopologicalOperator;

                hitGeometry = topoOp.Buffer(1);

            }

            ///判断图层的类型并作相应处理

            ///图层是要素图层

            if (identifyLayer is IFeatureLayer)

            {

                //获取要素图层

                IFeatureLayer featureLayer = identifyLayer as IFeatureLayer;

                //开始获取信息操作

                IIdentify2 identify2 = featureLayer as IIdentify2;

                //获取查询结果

                identifyObjs = identify2.Identify(hitGeometry, null);

            }

            ///图层是栅格数据层

            else if (identifyLayer is IRasterLayer)

            {

            }

                  else

            {

            }

            //返回获取要素的集合

            return identifyObjs;

        }