在C#中应用MapObjects(渲染效果)

在C#中应用MapObjects(渲染效果)

摘要：MapObjects C# 渲染 专题图

作者：杨雨田 Blue_Bat@126.Com

以前用MapX，里面有专题图，挺好。经过几天的试验，我把MapObjects中的各种渲染效果（类似MapX专题图，但不一样）都试了试，下面附上源代码，如果那位有不懂的地方请自己琢磨，哈哈…

代码如下：

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，下面给出基本的语句，有兴趣的

//兄弟姐妹们可以自己试试

// MapObjects2.ZRenderer zr = new MapObjects2.ZRendererClass();

// //Z值分成几部分？

// zr.BreakCount = 2;

// //设置各个部分的分界线

// zr.set_Break(0,100);

// zr.set_Break(1,1000);

// //设置特征类型

// zr.SymbolType = MapObjects2.SymbolTypeConstants.moPointSymbol;

// MapObjects2.Symbol sym;

// for(short i=0;i<zr.BreakCount;i++)

// {

// //获取特征

// sym = zr.get_Symbol(i);

// //设置特征属性，定义一个颜色数组，将不同特征设置不同颜色，效果会明显些

// sym.Color = (uint)MapObjects2.ColorConstants.moRed;

// sym.Size = 6;

// sym.Style = MapObjects2.MarkerStyleConstants.moTriangleMarker;

// }

// //添加到地图

// MapObjects2.MapLayer lyr = (MapObjects2.MapLayer)map.Layers.Item("带有Z值的图层名称");

// lyr.Renderer = zr;

// //刷新

// map.Refresh();

}

/// <summary>

/// 组渲染

/// </summary>

private void 组渲染_Click(object sender, System.EventArgs e)

{

//组渲染其实就是组合渲染，一般定义多个渲染方式，然后使用如下的语句进行组合

MapObjects2.MapLayer lyr = (MapObjects2.MapLayer)map.Layers.Item("country");

//标注渲染

MapObjects2.LabelRenderer lr = new MapObjects2.LabelRendererClass();

lr.Field = "NAME";

lr.get_Symbol(0).Color = (uint)MapObjects2.ColorConstants.moBlack;

lr.get_Symbol(0).Font.Size = 8;

//按值渲染

MapObjects2.Strings strs = new MapObjects2.StringsClass();

MapObjects2.Recordset rc = lyr.Records;

while(!rc.EOF)

{

strs.Add(rc.Fields.Item("FIPS_CODE").ValueAsString);

rc.MoveNext();

}

MapObjects2.ValueMapRenderer vmr = new MapObjects2.ValueMapRendererClass();

vmr.Field = "FIPS_CODE";

vmr.ValueCount = strs.Count;

vmr.UseDefault = true;

MapObjects2.Symbol sym = vmr.DefaultSymbol;

sym.Color = (uint)MapObjects2.ColorConstants.moYellow;

for(int i=0;i<vmr.ValueCount;i++)

{

vmr.set_Value((short)i,strs.Item((short)i));

}

//将二者组合，添加到图层

MapObjects2.GroupRenderer gr = new MapObjects2.GroupRendererClass();

gr.Add(vmr);

gr.Add(lr);

lyr.Renderer = gr;

map.Refresh();

}

/// <summary>

/// 删除所有渲染

/// </summary>

private void 删除所有渲染_Click(object sender, System.EventArgs e)

{

MapObjects2.MapLayer lyr;

for(int i=0;i<map.Layers.Count;i++)

{

lyr = (MapObjects2.MapLayer)map.Layers.Item(i);

lyr.Renderer = new MapObjects2.LabelRendererClass();

map.Refresh();

}

}

/// <summary>

/// 标注渲染

/// </summary>

private void 标注渲染_Click(object sender, System.EventArgs e)

{

MapObjects2.MapLayer lyr = (MapObjects2.MapLayer)map.Layers.Item("cities");

MapObjects2.LabelRenderer lr = new MapObjects2.LabelRendererClass();

lr.Field = "NAME";

lr.get_Symbol(0).Color = (uint)MapObjects2.ColorConstants.moBlack;

lr.get_Symbol(0).Font.Size = 8;

lyr.Renderer = lr;

map.Refresh();

}

}

}

杨雨田 blue_bat@126.com

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