AE基础(3)

using ESRI.ArcGIS.Controls;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Ch02Ex04
{
    public partial class Form1 : Form
    {
        int flag = 0;
        public Form1()
        {
            InitializeComponent();        
        }
 
        private void btnZoomIn_Click(object sender, EventArgs e)
        {
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerZoomIn;
            flag = 2;
        }
        //加载地图文档
        private void loadMapDocument()
        {
            System.Windows.Forms.OpenFileDialog openFileDialog;
            openFileDialog = new OpenFileDialog();
            openFileDialog.Title = "打开地图文档";
            openFileDialog.Filter = "map documents(*.mxd)|*.mxd";
            openFileDialog.ShowDialog();
            string filePath = openFileDialog.FileName;
            if (axMapControl1.CheckMxFile(filePath))
            {
                axMapControl1.MousePointer = esriControlsMousePointer.esriPointerHourglass;
                axMapControl1.LoadMxFile(filePath, 0, Type.Missing);
                axMapControl1.MousePointer = esriControlsMousePointer.esriPointerDefault;
            }
            else
            {
                MessageBox.Show(filePath + "不是有效的地图文档");
            }
        }
        private void axMapControl1_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)
        {
            ESRI.ArcGIS.Geometry.IEnvelope ipEnv;
            if (flag == 2)
            {
                ipEnv = axMapControl1.TrackRectangle();
                axMapControl1.Extent = ipEnv;
            }
            else if (flag == 1)
            {
                //ipEnv = axMapControl1.TrackRectangle();
                ipEnv = axMapControl1.Extent;
                ipEnv.Expand(2, 2, true);
                axMapControl1.Extent = ipEnv;
            }
            else if (flag == 3)
            {
                ipEnv = axMapControl1.Extent;
                axMapControl1.Pan();
            }

        }

        private void btnZoomOut_Click(object sender, EventArgs e)
        {
            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerZoomOut;
            flag = 1;
        }

        private void btnWalk_Click(object sender, EventArgs e)
        {

            axMapControl1.MousePointer = esriControlsMousePointer.esriPointerPan;
            flag = 3;
        }

        private void btnFullextebt_Click(object sender, EventArgs e)
        {
            axMapControl1.Extent = axMapControl1.FullExtent;
        }

        private void Form1_Click(object sender, EventArgs e)
        {
            loadMapDocument();
        }

    
    }
}