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。

*/

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);

}

}

}