MapObjects2.2 在C#中的应用(动态加载地图)

    技术2022-05-11  80

    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          /// 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();          }      } }   Trackback: http://tb.blog.csdn.net/TrackBack.aspx?PostId=59503

    最新回复(0)