MapObjects 2.2组件在C#中的应用(一)

昨天晚上在家没事，用MapObjects 2.2在C#中实现地图的图层的加载、放大、缩小、平移、全图功能，把代码拿出来和大家分享一下，代码写的不好的地方，请大家多多指教。

界面如下：



代码：

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace MapObJect
...{
    /**//// <summary>
    /// Form1 的摘要说明。
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    ...{
        private System.Windows.Forms.MainMenu mainMenu1;
        private System.Windows.Forms.MenuItem menuItem1;
        private System.Windows.Forms.MenuItem menuItem2;
        private System.Windows.Forms.MenuItem menuItem3;
        private System.Windows.Forms.MenuItem menuItem4;
        private System.Windows.Forms.MenuItem menuItem5;
        private System.Windows.Forms.MenuItem menuItem6;
        private System.Windows.Forms.MenuItem menuItem7;
        private System.Windows.Forms.ToolBar toolBar1;
        private System.Windows.Forms.ImageList imageList1;
        private System.Windows.Forms.ToolBarButton Open;
        private System.Windows.Forms.ToolBarButton toolBarButton2;
        private System.Windows.Forms.ToolBarButton ZoomIn;
        private System.Windows.Forms.ToolBarButton ZoomOut;
        private System.Windows.Forms.ToolBarButton Pan;
        private System.Windows.Forms.ToolBarButton toolBarButton6;
        private System.Windows.Forms.ToolBarButton ViewOver;
        private AxMapObjects2.AxMap axMap1;
        private System.Windows.Forms.OpenFileDialog openFileDialog1;
        private System.ComponentModel.IContainer components;
        private int toolBarButtonValue;


        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 );
        }

        Windows 窗体设计器生成的代码#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()
        ...{
            this.components = new System.ComponentModel.Container();
            System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));
            this.mainMenu1 = new System.Windows.Forms.MainMenu();
            this.menuItem1 = new System.Windows.Forms.MenuItem();
            this.menuItem2 = new System.Windows.Forms.MenuItem();
            this.menuItem3 = new System.Windows.Forms.MenuItem();
            this.menuItem4 = new System.Windows.Forms.MenuItem();
            this.menuItem5 = new System.Windows.Forms.MenuItem();
            this.menuItem6 = new System.Windows.Forms.MenuItem();
            this.menuItem7 = new System.Windows.Forms.MenuItem();
            this.toolBar1 = new System.Windows.Forms.ToolBar();
            this.Open = new System.Windows.Forms.ToolBarButton();
            this.toolBarButton2 = new System.Windows.Forms.ToolBarButton();
            this.ZoomIn = new System.Windows.Forms.ToolBarButton();
            this.ZoomOut = new System.Windows.Forms.ToolBarButton();
            this.Pan = new System.Windows.Forms.ToolBarButton();
            this.toolBarButton6 = new System.Windows.Forms.ToolBarButton();
            this.ViewOver = new System.Windows.Forms.ToolBarButton();
            this.imageList1 = new System.Windows.Forms.ImageList(this.components);
            this.axMap1 = new AxMapObjects2.AxMap();
            this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
            ((System.ComponentModel.ISupportInitialize)(this.axMap1)).BeginInit();
            this.SuspendLayout();
            // 
            // mainMenu1
            // 
            this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] ...{
                                                                                      this.menuItem1,
                                                                                      this.menuItem6,
                                                                                      this.menuItem7});
            // 
            // menuItem1
            // 
            this.menuItem1.Index = 0;
            this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] ...{
                                                                                      this.menuItem2,
                                                                                      this.menuItem3,
                                                                                      this.menuItem4,
                                                                                      this.menuItem5});
            this.menuItem1.Text = "File";
            // 
            // menuItem2
            // 
            this.menuItem2.Index = 0;
            this.menuItem2.Text = "Open";
            this.menuItem2.Click += new System.EventHandler(this.menuItem2_Click);
            // 
            // menuItem3
            // 
            this.menuItem3.Index = 1;
            this.menuItem3.Text = "Close";
            this.menuItem3.Click += new System.EventHandler(this.menuItem3_Click);
            // 
            // menuItem4
            // 
            this.menuItem4.Index = 2;
            this.menuItem4.Text = "-";
            // 
            // menuItem5
            // 
            this.menuItem5.Index = 3;
            this.menuItem5.Text = "Exit";
            // 
            // menuItem6
            // 
            this.menuItem6.Index = 1;
            this.menuItem6.Text = "Edit";
            // 
            // menuItem7
            // 
            this.menuItem7.Index = 2;
            this.menuItem7.Text = "Help";
            // 
            // toolBar1
            // 
            this.toolBar1.Buttons.AddRange(new System.Windows.Forms.ToolBarButton[] ...{
                                                                                        this.Open,
                                                                                        this.toolBarButton2,
                                                                                        this.ZoomIn,
                                                                                        this.ZoomOut,
                                                                                        this.Pan,
                                                                                        this.toolBarButton6,
                                                                                        this.ViewOver});
            this.toolBar1.DropDownArrows = true;
            this.toolBar1.ImageList = this.imageList1;
            this.toolBar1.Location = new System.Drawing.Point(0, 0);
            this.toolBar1.Name = "toolBar1";
            this.toolBar1.ShowToolTips = true;
            this.toolBar1.Size = new System.Drawing.Size(400, 28);
            this.toolBar1.TabIndex = 0;
            this.toolBar1.ButtonClick += new System.Windows.Forms.ToolBarButtonClickEventHandler(this.toolBar1_ButtonClick);
            // 
            // Open
            // 
            this.Open.ImageIndex = 4;
            this.Open.Tag = "Open";
            // 
            // toolBarButton2
            // 
            this.toolBarButton2.Style = System.Windows.Forms.ToolBarButtonStyle.Separator;
            // 
            // ZoomIn
            // 
            this.ZoomIn.ImageIndex = 0;
            this.ZoomIn.Tag = "ZoomIn";
            // 
            // ZoomOut
            // 
            this.ZoomOut.ImageIndex = 1;
            this.ZoomOut.Tag = "ZoomOut";
            // 
            // Pan
            // 
            this.Pan.ImageIndex = 3;
            this.Pan.Tag = "Pan";
            // 
            // toolBarButton6
            // 
            this.toolBarButton6.Style = System.Windows.Forms.ToolBarButtonStyle.Separator;
            // 
            // ViewOver
            // 
            this.ViewOver.ImageIndex = 2;
            this.ViewOver.Tag = "ViewOver";
            // 
            // imageList1
            // 
            this.imageList1.ImageSize = new System.Drawing.Size(16, 16);
            this.imageList1.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("imageList1.ImageStream")));
            this.imageList1.TransparentColor = System.Drawing.Color.Transparent;
            // 
            // axMap1
            // 
            this.axMap1.Location = new System.Drawing.Point(8, 32);
            this.axMap1.Name = "axMap1";
            this.axMap1.OcxState = ((System.Windows.Forms.AxHost.State)(resources.GetObject("axMap1.OcxState")));
            this.axMap1.Size = new System.Drawing.Size(384, 296);
            this.axMap1.TabIndex = 1;
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(400, 337);
            this.Controls.Add(this.axMap1);
            this.Controls.Add(this.toolBar1);
            this.Menu = this.mainMenu1;
            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 toolBar1_ButtonClick(object sender, System.Windows.Forms.ToolBarButtonClickEventArgs e)
        ...{
            if(e.Button.Tag.ToString()=="Open")
            ...{    
                ShowOpenFileDialog();
            }
            
            if(e.Button.Tag.ToString()=="ZoomIn")
            ...{
                toolBarButtonValue=1;
            }

            if(e.Button.Tag.ToString()=="ZoomOut")
            ...{
                toolBarButtonValue=2;
            }

            if(e.Button.Tag.ToString()=="Pan")
            ...{
                toolBarButtonValue=3;
            }

            if(e.Button.Tag.ToString()=="ViewOver")
            ...{
                axMap1.Extent=axMap1.FullExtent;
            }
        }

        private void Form1_Load(object sender, System.EventArgs e)
        ...{
            openFileDialog1.Filter="Sharp File|*.shp|All File|*.*";
            openFileDialog1.InitialDirectory="F:\Source\MapObject\Data\USA";

            axMap1.MouseDownEvent+=new AxMapObjects2._DMapEvents_MouseDownEventHandler(axMap1_MouseDownEvent);
            axMap1.MouseMoveEvent+=new AxMapObjects2._DMapEvents_MouseMoveEventHandler(axMap1_MouseMoveEvent);
        }

        private void ShowOpenFileDialog()
        ...{
            string strFilePath,strFileName,strSpliter1,strSpliter2;
            string[] strSplit1,strSplit2;
            int intCount;

            strSpliter1=@"";
            strSpliter2=@".";
            strFilePath="";
            strFileName="";
                
            openFileDialog1.FileName="";
            openFileDialog1.ShowDialog();
            
            strSplit1=openFileDialog1.FileName.Split(strSpliter1.ToCharArray());
            intCount=strSplit1.Length;
            for(int i=0;i<intCount-1;i++)
            ...{
                strFilePath=strFilePath+strSplit1[i]+@"";
            }
        
            for(int i=intCount-1;i<intCount;i++)
            ...{
                strSplit2=strSplit1[i].Split(strSpliter2.ToCharArray());
                strFileName=strSplit2[0];
            }
            
            AddLayer(strFilePath,strFileName);
        }

        private void AddLayer(string strDatabase,string strDatasetName)
        ...{
            MapObjects2.DataConnection objDataConn;
            MapObjects2.GeoDataset objGeoDataset;
            MapObjects2.MapLayer objMapLayer;

            objDataConn=new MapObjects2.DataConnectionClass();
            objMapLayer=new MapObjects2.MapLayerClass();

            objDataConn.Database=strDatabase;
            if(objDataConn.Connect())
            ...{    
                objGeoDataset=objDataConn.FindGeoDataset(strDatasetName);
                objMapLayer.GeoDataset=objGeoDataset;
                objMapLayer.Symbol.Color=Convert.ToUInt32( MapObjects2.ColorConstants.moYellow);

                axMap1.Layers.Add(objMapLayer);
                axMap1.Refresh();
            }
        }

        private void menuItem2_Click(object sender, System.EventArgs e)
        ...{
            ShowOpenFileDialog();
        }

        private void menuItem3_Click(object sender, System.EventArgs e)
        ...{
            axMap1.Layers.Clear();
            axMap1.Refresh();
        }

        private void axMap1_MouseDownEvent(object sender, AxMapObjects2._DMapEvents_MouseDownEvent e)
        ...{
            MapObjects2.Rectangle objRectangle;

            if(toolBarButtonValue==1)
            ...{    
                objRectangle=axMap1.TrackRectangle();
                axMap1.Extent=objRectangle;
            }

            if(toolBarButtonValue==2)
            ...{
                objRectangle=axMap1.Extent;
                objRectangle.ScaleRectangle(1.5);
                axMap1.Extent=objRectangle;
            }

            if(toolBarButtonValue==3)
            ...{
                axMap1.Pan();
            }
        }

        private void axMap1_MouseMoveEvent(object sender,AxMapObjects2._DMapEvents_MouseMoveEvent e)
        ...{
            if(toolBarButtonValue==1)
            ...{
                axMap1.MousePointer=MapObjects2.MousePointerConstants.moZoomIn;
            }

            if(toolBarButtonValue==2)
            ...{
                axMap1.MousePointer=MapObjects2.MousePointerConstants.moZoomOut;
            }

            if(toolBarButtonValue==3)
            ...{
                axMap1.MousePointer=MapObjects2.MousePointerConstants.moPan;
            }
        }
    }
}