MapObjects2.2 在C#中的应用(基本地图功能)

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更多发布于：2004-09-30 12:57

关键字：MapObjects 2.2 C#
 
仅仅实现了地图的放大、缩小、漫游、全图、距离、面积等功能。
 
/*
 * 杨雨田 blue_bat@126.com
 * 2004年7月27日
 */
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
 
namespace Artemis.IVS.Test
{
 /// <summary>
 /// 处理实例
 /// </summary>
 public class FrmMain : System.Windows.Forms.Form
 {
 private AxMapObjects2.AxMap mapMain;
 private System.Windows.Forms.MainMenu mainMenu1;
 private System.Windows.Forms.MenuItem miZoomIn;
 private System.Windows.Forms.MenuItem miZoomOut;
 private System.Windows.Forms.MenuItem miPan;
 private System.Windows.Forms.MenuItem miFullView;
 private int CurOperate = 0;
 private System.Windows.Forms.MenuItem miSelectByPoint;
 private System.Windows.Forms.MenuItem miDistance;
 private System.Windows.Forms.MenuItem miArea;
 /// <summary>
 /// 必需的设计器变量。
 /// </summary>
 private System.ComponentModel.Container components = null;
 
 public FrmMain()
 {
 //
 // Windows 窗体设计器支持所必需的
 //
 InitializeComponent();
 }
 
 /// <summary>
 /// 清理所有正在使用的资源。
 /// </summary>
 protected override void Dispose( bool disposing )
 {
 if( disposing )
 {
 if (components != null) 
 {
 components.Dispose();
 }
 }
 base.Dispose( disposing );
 }
 
 #region Windows 窗体设计器生成的代码
 /// <summary>
 /// 设计器支持所需的方法 - 不要使用代码编辑器修改
 /// 此方法的内容。
 /// </summary>
 private void InitializeComponent()
 {
 System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(FrmMain));
 this.mapMain = new AxMapObjects2.AxMap();
 this.mainMenu1 = new System.Windows.Forms.MainMenu();
 this.miZoomIn = new System.Windows.Forms.MenuItem();
 this.miZoomOut = new System.Windows.Forms.MenuItem();
 this.miPan = new System.Windows.Forms.MenuItem();
 this.miFullView = new System.Windows.Forms.MenuItem();
 this.miSelectByPoint = new System.Windows.Forms.MenuItem();
 this.miDistance = new System.Windows.Forms.MenuItem();
 this.miArea = new System.Windows.Forms.MenuItem();
 ((System.ComponentModel.ISupportInitialize)(this.mapMain)).BeginInit();
 this.SuspendLayout();
 // 
 // mapMain
 // 
 this.mapMain.Dock = System.Windows.Forms.DockStyle.Fill;
 this.mapMain.Location = new System.Drawing.Point(0, 0);
 this.mapMain.Name = "mapMain";
 this.mapMain.OcxState = ((System.Windows.Forms.AxHost.State)(resources.GetObject("mapMain.OcxState")));
 this.mapMain.Size = new System.Drawing.Size(592, 401);
 this.mapMain.TabIndex = 0;
 this.mapMain.MouseDownEvent += new AxMapObjects2._DMapEvents_MouseDownEventHandler(this.mapMain_MouseDownEvent);
 // 
 // mainMenu1
 // 
 this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
 this.miZoomIn,
 this.miZoomOut,
 this.miPan,
 this.miFullView,
 this.miSelectByPoint,
 this.miDistance,
 this.miArea});
 // 
 // miZoomIn
 // 
 this.miZoomIn.Index = 0;
 this.miZoomIn.Text = "放大";
 this.miZoomIn.Click += new System.EventHandler(this.miZoomIn_Click);
 // 
 // miZoomOut
 // 
 this.miZoomOut.Index = 1;
 this.miZoomOut.Text = "缩小";
 this.miZoomOut.Click += new System.EventHandler(this.miZoomOut_Click);
 // 
 // miPan
 // 
 this.miPan.Index = 2;
 this.miPan.Text = "漫游";
 this.miPan.Click += new System.EventHandler(this.miPan_Click);
 // 
 // miFullView
 // 
 this.miFullView.Index = 3;
 this.miFullView.Text = "全图";
 this.miFullView.Click += new System.EventHandler(this.miFullView_Click);
 // 
 // miSelectByPoint
 // 
 this.miSelectByPoint.Index = 4;
 this.miSelectByPoint.Text = "点选";
 this.miSelectByPoint.Click += new System.EventHandler(this.miSelectByPoint_Click);
 // 
 // miDistance
 // 
 this.miDistance.Index = 5;
 this.miDistance.Text = "距离";
 this.miDistance.Click += new System.EventHandler(this.miDistance_Click);
 // 
 // miArea
 // 
 this.miArea.Index = 6;
 this.miArea.Text = "面积";
 this.miArea.Click += new System.EventHandler(this.miArea_Click);
 // 
 // FrmMain
 // 
 this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
 this.ClientSize = new System.Drawing.Size(592, 401);
 this.Controls.Add(this.mapMain);
 this.Menu = this.mainMenu1;
 this.Name = "FrmMain";
 this.Text = "Artemis.IVS.Test";
 this.Load += new System.EventHandler(this.FrmMain_Load);
 ((System.ComponentModel.ISupportInitialize)(this.mapMain)).EndInit();
 this.ResumeLayout(false);
 
 }
 #endregion

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1楼^#

发布于：2004-09-30 12:57

/// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { Application.Run(new FrmMain()); } /// <summary> /// 全图 /// </summary> private void miFullView_Click(object sender, System.EventArgs e) { this.CurOperate = 4; mapMain.Extent = mapMain.FullExtent; mapMain.MousePointer = MapObjects2.MousePointerConstants.moDefault; } /// <summary> /// 漫游 /// </summary> private void miPan_Click(object sender, System.EventArgs e) { this.CurOperate = 3; mapMain.MousePointer = MapObjects2.MousePointerConstants.moPan; } /// <summary> /// 缩小 /// </summary> private void miZoomOut_Click(object sender, System.EventArgs e) { this.CurOperate = 2; mapMain.MousePointer = MapObjects2.MousePointerConstants.moZoomOut; } /// <summary> /// 放大 /// </summary> private void miZoomIn_Click(object sender, System.EventArgs e) { this.CurOperate = 1; mapMain.MousePointer = MapObjects2.MousePointerConstants.moZoomIn; } /// <summary> /// 放大缩小等的处理过程 /// </summary> private void mapMain_MouseDownEvent(object sender, AxMapObjects2._DMapEvents_MouseDownEvent e) { MapObjects2.Rectangle rect; MapObjects2.Point pt = mapMain.ToMapPoint(e.x,e.y); if(e.button == 2) this.CurOperate = 0;//右键点击取消 switch(this.CurOperate) { case 1://放大 { rect = mapMain.TrackRectangle(); if(rect == null|| (rect.Width < 0.00005) || (rect.Height < 0.00005)) { rect = mapMain.Extent; rect.ScaleRectangle(0.6667); rect.Offset(-(rect.Center.X - pt.X),-(rect.Center.Y - pt.Y)); } mapMain.Extent = rect; break; } case 2://缩小 { rect = mapMain.TrackRectangle(); if ((null == rect) || (rect.Width < 0.00005) || (rect.Height < 0.00005)) { rect = mapMain.Extent; rect.ScaleRectangle(1.5); rect.Offset(-(rect.Center.X - pt.X),-(rect.Center.Y - pt.Y)); } else { double dRate = mapMain.Extent.Width / rect.Width * 10; rect.ScaleRectangle(dRate); } mapMain.Extent = rect; break; } case 3://漫游 { mapMain.Pan(); break; } case 5://点选 { break; } case 6://距离 { MapObjects2.Points pts; pts = (MapObjects2.Points)mapMain.TrackLine().Parts.Item(0); double dDistance = 0; for(int i=0;i<pts.Count-1;i++) { dDistance += Math.Sqrt(pts.Item(i).X*pts.Item(i).X + pts.Item(i).Y*pts.Item(i).Y); } this.Text = mapMain.ToMapDistance((float)dDistance).ToString(); break; } case 7://面积 { MapObjects2.Polygon ply = mapMain.TrackPolygon(); double dArea = ply.Area; this.Text = mapMain.ToMapDistance((float)dArea).ToString(); break; } default://箭头 { mapMain.MousePointer = MapObjects2.MousePointerConstants.moDefault; break; } } }

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发布于：2004-09-30 12:58

/// <summary> /// 点选 /// </summary> private void miSelectByPoint_Click(object sender, System.EventArgs e) { this.CurOperate = 5; mapMain.MousePointer = MapObjects2.MousePointerConstants.moArrowQuestion; } /// <summary> /// 距离 /// </summary> private void miDistance_Click(object sender, System.EventArgs e) { this.CurOperate = 6; mapMain.MousePointer = MapObjects2.MousePointerConstants.moCross; } /// <summary> /// 面积 /// </summary> private void miArea_Click(object sender, System.EventArgs e) { this.CurOperate = 7; mapMain.MousePointer = MapObjects2.MousePointerConstants.moCross; } }}

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