MapObjects2.2 在C#中的应用(动态加载地图)

关键字：MapObjects 2.2 C#

本篇文章实现了动态加载地图的功能，废话少说，功能实现见代码。

加载过程代码：

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

namespace LoadMap

{

     /// <summary>

     /// Form1 的摘要说明。

     /// </summary>

     public class Form1 : System.Windows.Forms.Form

     {

          private AxMapObjects2.AxMap axMap1;

         /// <summary>

         /// 必需的设计器变量。

         /// </summary>

          private System.ComponentModel.Container components = null;

         public Form1()

         {

              //

              // Windows 窗体设计器支持所必需的

              //

              InitializeComponent();

              //

              // TODO: 在 InitializeComponent 调用后添加任何构造函数代码

              //

         }

         /// <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[page]         /// 此方法的内容。

         /// </summary>

          private void InitializeComponent()

         {

              System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));

              this.axMap1 = new AxMapObjects2.AxMap();

              ((System.ComponentModel.ISupportInitialize)(this.axMap1)).BeginInit();

              this.SuspendLayout();

              //

              // axMap1

              //

              this.axMap1.Dock = System.Windows.Forms.DockStyle.Fill;

              this.axMap1.Location = new System.Drawing.Point(0, 0);

              this.axMap1.Name = "axMap1";

              this.axMap1.OcxState = ((System.Windows.Forms.AxHost.State)(resources.GetObject("axMap1.OcxState")));

              this.axMap1.Size = new System.Drawing.Size(600, 357);

              this.axMap1.TabIndex = 0;

              //

              // Form1

              //

              this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);

              this.ClientSize = new System.Drawing.Size(600, 357);

              this.Controls.Add(this.axMap1);

              this.Name = "Form1";

              this.Text = "Form1";

              this.Load += new System.EventHandler(this.Form1_Load);

              ((System.ComponentModel.ISupportInitialize)(this.axMap1)).EndInit();

              this.ResumeLayout(false);

         }

          #endregion

         /// <summary>

         /// 应用程序的主入口点。

         /// </summary>

          [STAThread]

         static void Main()

         {

              Application.Run(new Form1());

         }

          private void Form1_Load(object sender, System.EventArgs e)

         {

              //定义数据连接

              MapObjects2.DataConnection dc = new MapObjects2.DataConnectionClass();

              //定义图层

              MapObjects2.MapLayer layer = new MapObjects2.MapLayerClass();

              //我的地图文件都存在了"G:\\LoadMap\\bin\\Debug\\"目录下，请替换为自己的地图目录

              dc.Database = "G:\\LoadMap\\bin\\Debug\\";

              //连接不成功就退出

              if(!dc.Connect())

              {

                   MessageBox.Show("在指定的文件夹下没找到图层数据文件");

                   Application.Exit();

              }

              else//连接成功了就加载地图

              {

                   /*

                    * 地图加载顺序一般是面、线、点，先加载的在地图的最下

                    */

                   //加载图层States，

                   layer.GeoDataset = dc.FindGeoDataset("States");

                   axMap1.Layers.Add(layer);

                   //加载图层Rivers，

                   layer.GeoDataset = dc.FindGeoDataset("Rivers");

                   axMap1.Layers.Add(layer);

                   //加载其它图层...

              }

              //必须进行刷新后才能显示

              axMap1.Refresh();

         }

     }

}