C#初学者??鹰眼功能的完整实现

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;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Display;
namespace 鹰眼2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender， EventArgs e)
{
LoadDocument();
}
IMapDocument mMapDocument;
private void LoadDocument()
{
mMapDocument = new MapDocumentClass();
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.Filter = "(*.mxd)|*.mxd";
openFileDialog1.Title = "打开地图文档";
openFileDialog1.ShowDialog();
string Path = openFileDialog1.FileName;
if (axMapControl1.CheckMxFile(Path))
{
axMapControl1.LoadMxFile(Path);
}
axMapControl1.Refresh();
}
private void axMapControl1_OnExtentUpdated(object sender， ESRI.ArcGIS.Controls.IMapControlEvents2_OnExtentUpdatedEvent e)
{
//得到新范围
IEnvelope pEnvelope = (IEnvelope)e.newEnvelope;
IGraphicsContainer pGraphicsContainer = axMapControl2.Map as IGraphicsContainer;
IActiveView pActiveView = pGraphicsContainer as IActiveView;
//在绘制前  清楚axMapControl2中的任何元素
pGraphicsContainer.DeleteAllElements();
IRectangleElement pRectangleEle = new RectangleElementClass();
IElement pElement = pRectangleEle as IElement;
pElement.Geometry = pEnvelope;
//设置鹰眼图中的红线框
IRgbColor pColor = new RgbColorClass();
pColor.Red = 255;
pColor.Green = 0;
pColor.Blue = 0;
pColor.Transparency = 255;
//产生一个线符号对象
ILineSymbol pOutline = new SimpleLineSymbolClass();
pOutline.Width = 3;
pOutline.Color = pColor;
//设置颜色属性
pColor = new RgbColorClass();
pColor.Red = 255;
pColor.Green = 0;
pColor.Blue = 0;
pColor.Transparency = 0;