using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; namespace DbInMo {      /// <summary>      /// Form1 的摘要说明。      /// </summary>      public class 渲染示例 : System.Windows.Forms.Form      {           private AxMapObjects2.AxMap map;           private System.Windows.Forms.Button 直方图;           private System.Windows.Forms.Button 饼图;           private System.Windows.Forms.Button 点密度;           private System.Windows.Forms.Button 按值渲染;           private System.Windows.Forms.Button 分类渲染;           private System.Windows.Forms.Button Z值渲染;           private System.Windows.Forms.Button 组渲染;           private System.Windows.Forms.Button 退出;           private System.Windows.Forms.Panel 操作板;           private System.Windows.Forms.Button 删除所有渲染;           private System.Windows.Forms.Panel panel1;           private System.Windows.Forms.Button 全图;           private System.Windows.Forms.Button 拖动;           private System.Windows.Forms.Button 缩小;           private System.Windows.Forms.Button 放大;           private System.Windows.Forms.Panel 分隔符;           private System.Windows.Forms.Button 标注渲染;          /// <summary>          /// 必需的设计器变量。          /// </summary>           private System.ComponentModel.Container components = null;          public 渲染示例()          {               //               // 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(渲染示例));               this.map = new AxMapObjects2.AxMap();               this.操作板 = new System.Windows.Forms.Panel();               this.直方图 = new System.Windows.Forms.Button();               this.饼图 = new System.Windows.Forms.Button();               this.点密度 = new System.Windows.Forms.Button();               this.按值渲染 = new System.Windows.Forms.Button();               this.分类渲染 = new System.Windows.Forms.Button();               this.Z值渲染 = new System.Windows.Forms.Button();               this.组渲染 = new System.Windows.Forms.Button();               this.退出 = new System.Windows.Forms.Button();               this.标注渲染 = new System.Windows.Forms.Button();               this.删除所有渲染 = new System.Windows.Forms.Button();               this.panel1 = new System.Windows.Forms.Panel();               this.全图 = new System.Windows.Forms.Button();               this.拖动 = new System.Windows.Forms.Button();               this.缩小 = new System.Windows.Forms.Button();               this.放大 = new System.Windows.Forms.Button();               this.分隔符 = new System.Windows.Forms.Panel();               ((System.ComponentModel.ISupportInitialize)(this.map)).BeginInit();               this.操作板.SuspendLayout();               this.SuspendLayout();               //                // map               //                this.map.Dock = System.Windows.Forms.DockStyle.Fill;               this.map.Location = new System.Drawing.Point(0, 0);               this.map.Name = "map";               this.map.OcxState = ((System.Windows.Forms.AxHost.State)(resources.GetObject("map.OcxState")));               this.map.Size = new System.Drawing.Size(616, 429);               this.map.TabIndex = 0;               this.map.MouseDownEvent += new AxMapObjects2._DMapEvents_MouseDownEventHandler(this.map_MouseDownEvent);               //                // 操作板               //                this.操作板.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;               this.操作板.Controls.Add(this.删除所有渲染);               this.操作板.Controls.Add(this.panel1);               this.操作板.Controls.Add(this.全图);               this.操作板.Controls.Add(this.拖动);               this.操作板.Controls.Add(this.缩小);               this.操作板.Controls.Add(this.放大);               this.操作板.Controls.Add(this.分隔符);               this.操作板.Controls.Add(this.标注渲染);               this.操作板.Controls.Add(this.退出);               this.操作板.Controls.Add(this.组渲染);               this.操作板.Controls.Add(this.Z值渲染);               this.操作板.Controls.Add(this.分类渲染);               this.操作板.Controls.Add(this.按值渲染);               this.操作板.Controls.Add(this.点密度);               this.操作板.Controls.Add(this.饼图);               this.操作板.Controls.Add(this.直方图);               this.操作板.Dock = System.Windows.Forms.DockStyle.Right;               this.操作板.Location = new System.Drawing.Point(496, 0);               this.操作板.Name = "操作板";               this.操作板.Size = new System.Drawing.Size(120, 429);               this.操作板.TabIndex = 1;               //                // 直方图               //                this.直方图.Dock = System.Windows.Forms.DockStyle.Top;               this.直方图.Location = new System.Drawing.Point(0, 0);               this.直方图.Name = "直方图";               this.直方图.Size = new System.Drawing.Size(116, 24);               this.直方图.TabIndex = 0;               this.直方图.Text = "直方图";               this.直方图.Click += new System.EventHandler(this.直方图_Click);               //                // 饼图               //                this.饼图.Dock = System.Windows.Forms.DockStyle.Top;               this.饼图.Location = new System.Drawing.Point(0, 24);               this.饼图.Name = "饼图";               this.饼图.Size = new System.Drawing.Size(116, 24);               this.饼图.TabIndex = 1;               this.饼图.Text = "饼图";               this.饼图.Click += new System.EventHandler(this.饼图_Click);               //                // 点密度               //                this.点密度.Dock = System.Windows.Forms.DockStyle.Top;               this.点密度.Location = new System.Drawing.Point(0, 48);               this.点密度.Name = "点密度";               this.点密度.Size = new System.Drawing.Size(116, 23);               this.点密度.TabIndex = 2;               this.点密度.Text = "点密度";               this.点密度.Click += new System.EventHandler(this.点密度_Click);               //                // 按值渲染               //                this.按值渲染.Dock = System.Windows.Forms.DockStyle.Top;               this.按值渲染.Location = new System.Drawing.Point(0, 71);               this.按值渲染.Name = "按值渲染";               this.按值渲染.Size = new System.Drawing.Size(116, 23);               this.按值渲染.TabIndex = 3;               this.按值渲染.Text = "按值渲染";               this.按值渲染.Click += new System.EventHandler(this.按值渲染_Click);               //                // 分类渲染               //                this.分类渲染.Dock = System.Windows.Forms.DockStyle.Top;               this.分类渲染.Location = new System.Drawing.Point(0, 94);               this.分类渲染.Name = "分类渲染";               this.分类渲染.Size = new System.Drawing.Size(116, 23);               this.分类渲染.TabIndex = 4;               this.分类渲染.Text = "分类渲染";               this.分类渲染.Click += new System.EventHandler(this.分类渲染_Click);               //                // Z值渲染               //                this.Z值渲染.Dock = System.Windows.Forms.DockStyle.Top;               this.Z值渲染.Location = new System.Drawing.Point(0, 117);               this.Z值渲染.Name = "Z值渲染";               this.Z值渲染.Size = new System.Drawing.Size(116, 23);               this.Z值渲染.TabIndex = 5;               this.Z值渲染.Text = "Z值渲染";               this.Z值渲染.Click += new System.EventHandler(this.Z值渲染_Click);               //                // 组渲染               //                this.组渲染.Dock = System.Windows.Forms.DockStyle.Top;               this.组渲染.Location = new System.Drawing.Point(0, 140);               this.组渲染.Name = "组渲染";               this.组渲染.Size = new System.Drawing.Size(116, 23);               this.组渲染.TabIndex = 6;               this.组渲染.Text = "组渲染";               this.组渲染.Click += new System.EventHandler(this.组渲染_Click);               //                // 退出               //                this.退出.Dock = System.Windows.Forms.DockStyle.Bottom;               this.退出.Location = new System.Drawing.Point(0, 402);               this.退出.Name = "退出";               this.退出.Size = new System.Drawing.Size(116, 23);               this.退出.TabIndex = 7;               this.退出.Text = "退出";               this.退出.Click += new System.EventHandler(this.退出_Click);               //                // 标注渲染               //                this.标注渲染.Dock = System.Windows.Forms.DockStyle.Top;               this.标注渲染.Location = new System.Drawing.Point(0, 163);               this.标注渲染.Name = "标注渲染";               this.标注渲染.Size = new System.Drawing.Size(116, 23);               this.标注渲染.TabIndex = 7;               this.标注渲染.Text = "标注渲染";               this.标注渲染.Click += new System.EventHandler(this.标注渲染_Click);               //                // 删除所有渲染               //                this.删除所有渲染.Dock = System.Windows.Forms.DockStyle.Top;               this.删除所有渲染.Location = new System.Drawing.Point(0, 319);               this.删除所有渲染.Name = "删除所有渲染";               this.删除所有渲染.Size = new System.Drawing.Size(116, 23);               this.删除所有渲染.TabIndex = 22;               this.删除所有渲染.Text = "删除所有渲染";               this.删除所有渲染.Click += new System.EventHandler(this.删除所有渲染_Click);               //                // panel1               //                this.panel1.Dock = System.Windows.Forms.DockStyle.Top;               this.panel1.Location = new System.Drawing.Point(0, 299);               this.panel1.Name = "panel1";               this.panel1.Size = new System.Drawing.Size(116, 20);               this.panel1.TabIndex = 21;               //                // 全图               //                this.全图.Dock = System.Windows.Forms.DockStyle.Top;               this.全图.Location = new System.Drawing.Point(0, 276);               this.全图.Name = "全图";               this.全图.Size = new System.Drawing.Size(116, 23);               this.全图.TabIndex = 20;               this.全图.Text = "全图";               this.全图.Click += new System.EventHandler(this.全图_Click);               //                // 拖动               //                this.拖动.Dock = System.Windows.Forms.DockStyle.Top;               this.拖动.Location = new System.Drawing.Point(0, 253);               this.拖动.Name = "拖动";               this.拖动.Size = new System.Drawing.Size(116, 23);               this.拖动.TabIndex = 19;               this.拖动.Text = "拖动";               this.拖动.Click += new System.EventHandler(this.拖动_Click);               //                // 缩小               //                this.缩小.Dock = System.Windows.Forms.DockStyle.Top;               this.缩小.Location = new System.Drawing.Point(0, 230);               this.缩小.Name = "缩小";               this.缩小.Size = new System.Drawing.Size(116, 23);               this.缩小.TabIndex = 18;               this.缩小.Text = "缩小";               this.缩小.Click += new System.EventHandler(this.缩小_Click);               //                // 放大               //                this.放大.Dock = System.Windows.Forms.DockStyle.Top;               this.放大.Location = new System.Drawing.Point(0, 207);               this.放大.Name = "放大";               this.放大.Size = new System.Drawing.Size(116, 23);               this.放大.TabIndex = 17;               this.放大.Text = "放大";               this.放大.Click += new System.EventHandler(this.放大_Click);               //                // 分隔符               //                this.分隔符.Dock = System.Windows.Forms.DockStyle.Top;               this.分隔符.Location = new System.Drawing.Point(0, 186);               this.分隔符.Name = "分隔符";               this.分隔符.Size = new System.Drawing.Size(116, 21);               this.分隔符.TabIndex = 16;               //                // 渲染示例               //                this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);               this.ClientSize = new System.Drawing.Size(616, 429);               this.Controls.Add(this.操作板);               this.Controls.Add(this.map);               this.Name = "渲染示例";               this.Text = "渲染示例";               this.WindowState = System.Windows.Forms.FormWindowState.Maximized;               ((System.ComponentModel.ISupportInitialize)(this.map)).EndInit();               this.操作板.ResumeLayout(false);               this.ResumeLayout(false);          }           #endregion          /// <summary>          /// 应用程序的主入口点。          /// </summary>           [STAThread]          static void Main()           {               Application.Run(new 渲染示例());          }          /// <summary>          /// 退出系统          /// </summary>           private void 退出_Click(object sender, System.EventArgs e)          {               this.Close();          }          /// <summary>          /// 图表渲染，值方图          /// </summary>           private void 直方图_Click(object sender, System.EventArgs e)          {               //直方图的例子中使用Lakers图层               //               //定义图标渲染变量               MapObjects2.ChartRenderer cr = new MapObjects2.ChartRendererClass();               //设置渲染类型为直方图               cr.ChartType = MapObjects2.ChartTypeConstants.moBar;               //设置直方图显示的字段个数为两个，就是直方图显示两个柱子               cr.FieldCount = 2;               //设置第一个字段，请参看lakes.dbf               cr.set_Field(0,"SURF_ELEV");               //设置这个直方图的柱子颜色为红色               cr.set_Color(0,(uint)MapObjects2.ColorConstants.moRed);               //设置第二个柱子               cr.set_Field(1,"DEPTH");               cr.set_Color(1,(uint)MapObjects2.ColorConstants.moGreen);               MapObjects2.MapLayer lyr = (MapObjects2.MapLayer)(map.Layers.Item("lakes"));               lyr.Renderer = cr;               //使用Refresh()刷新老也是刷新不好，正没办法。。。，设为全图倒是不错的注意，^_^               map.Refresh();          }          /// <summary>          /// 全图视野          /// </summary>           private void 全图_Click(object sender, System.EventArgs e)          {               map.Extent = map.FullExtent;          }          /// <summary>          /// 拖动，只设置图标          /// </summary>           private void 拖动_Click(object sender, System.EventArgs e)          {               map.MousePointer = MapObjects2.MousePointerConstants.moPan;          }          /// <summary>          /// 缩小，只设置图标          /// </summary>           private void 缩小_Click(object sender, System.EventArgs e)          {               map.MousePointer = MapObjects2.MousePointerConstants.moZoomOut;          }          /// <summary>          /// 放大，只设置图标          /// </summary>           private void 放大_Click(object sender, System.EventArgs e)          {               map.MousePointer = MapObjects2.MousePointerConstants.moZoomIn;          }          /// <summary>          /// 鼠标按下时间，处理地图放大、缩小、拖动等。          /// </summary>           private void map_MouseDownEvent(object sender, AxMapObjects2._DMapEvents_MouseDownEvent e)          {               MapObjects2.Rectangle rect;               MapObjects2.Point pt = map.ToMapPoint(e.x,e.y);               if(e.button == 2)//右键点击取消               {                    map.MousePointer = MapObjects2.MousePointerConstants.moDefault;               }               if(map.MousePointer == MapObjects2.MousePointerConstants.moPan)//拖动               {                    map.Pan();               }               else if(map.MousePointer == MapObjects2.MousePointerConstants.moZoomIn)//放大               {                    rect = map.TrackRectangle();                    if(rect == null|| (rect.Width < 0.00005) || (rect.Height < 0.00005))                    {                                                   rect = map.Extent;                         rect.ScaleRectangle(0.6667);                         rect.Offset(-(rect.Center.X - pt.X),-(rect.Center.Y - pt.Y));                    }                    map.Extent = rect;               }               else if(map.MousePointer == MapObjects2.MousePointerConstants.moZoomOut)//缩小               {                    rect = map.TrackRectangle();                    if ((null == rect) || (rect.Width < 0.00005) || (rect.Height < 0.00005))                    {                        rect = map.Extent;                         rect.ScaleRectangle(1.5);                         rect.Offset(-(rect.Center.X - pt.X),-(rect.Center.Y - pt.Y));                    }                    else                    {                            double dRate = map.Extent.Width / rect.Width * 10;                           rect.ScaleRectangle(dRate);                    }                    map.Extent = rect;               }           }          /// <summary>          /// 图表渲染，使用饼图          /// </summary>           private void 饼图_Click(object sender, System.EventArgs e)          {               //饼图的例子中使用Lakers图层               //过程和直方图一样               //               //定义图标渲染变量               MapObjects2.ChartRenderer cr = new MapObjects2.ChartRendererClass();               //设置渲染类型为饼图               cr.ChartType = MapObjects2.ChartTypeConstants.moPie;               //设置饼图显示的字段个数为两个，就是饼图显示两半               cr.FieldCount = 2;               //设置第一个字段，请参看lakes.dbf               cr.set_Field(0,"SURF_ELEV");               //设置这个饼图的一半颜色为红色               cr.set_Color(0,(uint)MapObjects2.ColorConstants.moRed);               //设置第二半               cr.set_Field(1,"DEPTH");               cr.set_Color(1,(uint)MapObjects2.ColorConstants.moGreen);               //添加到地图上               MapObjects2.MapLayer lyr = (MapObjects2.MapLayer)(map.Layers.Item("lakes"));               lyr.Renderer = cr;               //刷新               map.Refresh();                }          /// <summary>          /// 点密度渲染          /// </summary>           private void 点密度_Click(object sender, System.EventArgs e)          {               //点密度的例子中使用lakes图层               //               //定义点密度渲染变量               MapObjects2.DotDensityRenderer ddr = new MapObjects2.DotDensityRendererClass();               //设置渲染的数据字段，请参看lakes.dbf               ddr.Field = "DEPTH";               //点大小               ddr.DotSize = 3;               //点颜色               ddr.DotColor = (uint)MapObjects2.ColorConstants.moBlue;               ddr.DotValue = 1;               ddr.DrawBackground = true;               //添加到地图上               MapObjects2.MapLayer lyr = (MapObjects2.MapLayer)(map.Layers.Item("lakes"));               lyr.Renderer = ddr;               //刷新               map.Refresh();          }          /// <summary>          /// 按值渲染          /// </summary>           private void 按值渲染_Click(object sender, System.EventArgs e)          {               //按值渲染的例子中使用country图层，这里利用按值渲染，将每个国家用不同的颜色显示               //               //字符串s变量，很像Delphi中的TStringList，^_^               MapObjects2.Strings strs = new MapObjects2.StringsClass();               //图层变量，引用country图层               MapObjects2.MapLayer lyr = (MapObjects2.MapLayer)map.Layers.Item("country");               //Recordset对象，我将在以后的文章中陆续讲解关于MapObjects2.2中使用数据集变量的内容！！！               //使用方法大致与VB中对数据表的操作差不多。               MapObjects2.Recordset rc = lyr.Records;               //这个循环获取所有国家的简称代码列表               while(!rc.EOF)               {                    strs.Add(rc.Fields.Item("FIPS_CODE").ValueAsString);                    rc.MoveNext();               }               //定义按值渲染对象               MapObjects2.ValueMapRenderer vmr = new MapObjects2.ValueMapRendererClass();               //将其添加到图层               lyr.Renderer = vmr;               //设置渲染使用的字段，请参看country.dbf文件               vmr.Field = "FIPS_CODE";               //渲染的个数               vmr.ValueCount = strs.Count;               //缺省值               vmr.UseDefault = true;               MapObjects2.Symbol sym = vmr.DefaultSymbol;               sym.Color = (uint)MapObjects2.ColorConstants.moYellow;//缺省颜色为黄色               //渲染过程               for(int i=0;i<vmr.ValueCount;i++)               {                    vmr.set_Value((short)i,strs.Item((short)i));               }               //刷新               map.Refresh();          }          /// <summary>          /// 分类渲染          /// </summary>           private void 分类渲染_Click(object sender, System.EventArgs e)          {               //分类渲染的例子使用country图层               //               //图层变量引用cities层               MapObjects2.MapLayer lyr = (MapObjects2.MapLayer)(map.Layers.Item("cities"));               //定义分类渲染变量               MapObjects2.ClassBreaksRenderer cbr = new MapObjects2.ClassBreaksRendererClass();               //添加到地图               lyr.Renderer = cbr;               //设置符号类型为点，也可使用其他类型，请自己试验，方法大概都差不多               cbr.SymbolType = MapObjects2.SymbolTypeConstants.moPointSymbol;               //设置字段，请参看cities.dbf文件               cbr.Field = "POPULATION";               //Statistics对象经常配合分类渲染使用，他表示用一个Recordset对象的CalculateStatistics方法               //  对一个数值字段的统计计算结果               MapObjects2.Statistics stat = lyr.Records.CalculateStatistics("POPULATION");               //Mean——平均值，StdDev——均方差               double fbv = stat.Mean - (stat.StdDev * 3);               for(int i=0;i<6;i++)               {                    if((fbv >= stat.Min)&&fbv <= stat.Max)                    {                        //分类个数，依次加一                         cbr.BreakCount = (short)(cbr.BreakCount + 1);                        //设置分类                         cbr.set_Break((short)(cbr.BreakCount - 1),fbv);                    }                    fbv += stat.StdDev;               }               //SizeSymbols方法制定头尾的大小用来表现点特征大小渐进效果               cbr.SizeSymbols(3,8);               //RampColors方法设置颜色从白色到红色的渐进显示               cbr.RampColors((uint)MapObjects2.ColorConstants.moWhite,(uint)MapObjects2.ColorConstants.moRed);               //刷新               map.Refresh();          }          /// <summary>          /// Z值渲染          /// </summary>           private void Z值渲染_Click(object sender, System.EventArgs e)          {               //本来想好好搞搞，可是我找不到带有Z值的地图，哈哈，认了吧，