MapX 控件在C# 中的应用

楼主^#

更多发布于：2004-09-30 12:53

关键字：MapX，C#，Net，ActiveX控件
 
/*
 * 在这段代码中，我们应用MapX控件结合老美地图做了最基本的
 * 地图浏览功能：放大、缩小、拖动、全图、测量距离、测量面积。
 * 
 * 杨雨田 YangYutian@Hotmail.Com
 */
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
 
namespace wa
{
 public class frmMain : System.Windows.Forms.Form
 {
 private AxMapXLib.AxMap mapMain;
 
 private double MapZoom;
 private double CenterX;
 private double CenterY;
 private System.Windows.Forms.StatusBar sbMain;
 private System.Windows.Forms.MainMenu mainMenu;
 private System.Windows.Forms.MenuItem miMap;
 private System.Windows.Forms.MenuItem miMapToolZoomIn;
 private System.Windows.Forms.MenuItem miMapToolZoomout;
 private System.Windows.Forms.MenuItem miMapToolPan;
 private System.Windows.Forms.MenuItem miMapToolRestore;
 private System.Windows.Forms.MenuItem miMapToolDistance;
 private System.Windows.Forms.MenuItem miMapToolArea;
 private System.Windows.Forms.MenuItem miMapTool;
 
 private System.ComponentModel.Container components = null;
 
 public frmMain()
 {
 InitializeComponent();
 }
 
 protected override void Dispose( bool disposing )
 {
 //略
 }
 
 #region Windows 窗体设计器生成的代码
 private void InitializeComponent()
 {
 //略
 }
 #endregion
 
 [STAThread]
 static void Main() 
 {
 Application.Run(new Form1());
 }
 
 private void mapMain_PolyToolUsed(object sender, AxMapXLib.CMapXEvents_PolyToolUsedEvent e)
 {
 if(e.toolNum == 99)//测量距离
 {
 MapXLib.Points pts = (MapXLib.Points)e.points;
 MapXLib.Point pt1,pt2;
 double d=0.0;
 //计算顺序两个点距离,累计得到总距离
 for(int i=1;i<pts.Count;i++)
 {
 pt1=pts.Item(i);
 pt2=pts.Item(i+1);
 d += mapMain.Distance(pt1.X,pt1.Y,pt2.X,pt2.Y);
 }
 sbMain.Text = "距离:" + d.ToString();
 }
 else if(e.toolNum == 98)//面积
 {
 MapXLib.Points pts = (MapXLib.Points)e.points;
 //偷懒了但是很正确
 MapXLib.FeatureFactory dd = mapMain.FeatureFactory;
 MapXLib.Style style = mapMain.DefaultStyle;
 sbMain.Text = "面积:" + dd.CreateRegion(pts,style).Area.ToString();
 }
 }
 
 private void miMapToolZoomIn_Click(object sender, System.EventArgs e)
 {
 //放大
 mapMain.CurrentTool = MapXLib.ToolConstants.miZoomInTool;
 }
 
 private void miMapToolZoomout_Click(object sender, System.EventArgs e)
 {
 //缩小
 mapMain.CurrentTool = MapXLib.ToolConstants.miZoomOutTool;
 }
 
 private void miMapToolPan_Click(object sender, System.EventArgs e)
 {
 //拖动
 mapMain.CurrentTool = MapXLib.ToolConstants.miPanTool;
 }
 
 private void miMapToolRestore_Click(object sender, System.EventArgs e)
 {
 //缩放到初始大小(全图)
 mapMain.ZoomTo(this.MapZoom,this.CenterX,this.CenterY);
 }
 
 private void miMapToolDistance_Click(object sender, System.EventArgs e)
 {
 //测量距离
 mapMain.CurrentTool = (MapXLib.ToolConstants)99;
 }
 
 private void miMapToolArea_Click(object sender, System.EventArgs e)
 {
 //测量面积
 mapMain.CurrentTool = (MapXLib.ToolConstants) 98;
 }
 
 private void frmMain_Load(object sender, System.EventArgs e)
 {
 //记录地图的比例合中心点
 this.MapZoom = mapMain.Zoom;
 this.CenterX = mapMain.CenterX;
 this.CenterY = mapMain.CenterY;
 //创建测量距离的工具
 mapMain.CreateCustomTool(99,(short)MapXLib.ToolTypeConstants.miToolTypePoly,MapXLib.CursorConstants.miCrossCursor,MapXLib.CursorConstants.miCrossCursor,MapXLib.CursorConstants.miCrossCursor,false);
 //创建测量面积的工具
 mapMain.CreateCustomTool(98,(short)MapXLib.ToolTypeConstants.miToolTypePolygon,MapXLib.CursorConstants.miCrossCursor,MapXLib.CursorConstants.miCrossCursor,MapXLib.CursorConstants.miCrossCursor,false);
 }
 }
}

喜欢0 评分0

GIS麦田守望者，期待与您交流。

举报回复

发帖回复

« 返回列表

您需要登录后才可以回帖，登录或者注册

返回顶部

MapX 控件在C# 中的应用

最新喜欢：