凡是根据参数生成固定图形的，CAD插件程序都可以胜任。
效果展示：
1，命令行：
2，右键菜单：
3，工具条，CAD内嵌界面，和winform一样简单
闲话少说，直接上原理和代码：
0, 项目效果查看： a:在CAD2006的命令行输入netload，加载Test.dll b1:在命令行输入helloworld可以看到命令功能 b2:右键可以看到右键菜单，画一个红色的圆 b3:左边工具面板多了一个工具条，有个界面可以输入各种参数来画一个组合图形 1，建一个xindows窗体程序项目，设置输出为类库 2，引用acdbmgd.dll和acmgd.dll 3，引用如下命名空间 using Autodesk.AutoCAD.EditorInput; using Autodesk.AutoCAD.ApplicationServices; using Autodesk.AutoCAD.Runtime; using Autodesk.AutoCAD.DatabaseServices; using Autodesk.AutoCAD.Geometry; using Autodesk.AutoCAD.Windows.ToolPalette; using Autodesk.AutoCAD.Windows; 4，在Form1上规划界面和后台代码。重点看代码如何实现 5，计划是CAD上增加一个面板按钮，点击按钮就打开Form1来自动画图。 这里我们加一个用户控件，拖一个按钮，按钮方法写： Form1 modalForm = new Form1(); Autodesk.AutoCAD.ApplicationServices.Application.ShowModalDialog(modalForm); 注意这里仅仅是打开的窗体的方式选择了AutoCAD的方式。 想建立一整套工具栏，就多拉几个按钮。按4的方法写好每个按钮执行的代码（可以要个Form1这样的界面，也可以不要，自由选择） 6,把这个项目导出还需要一个类来辅助 先看初始化Initialize()和Terminate()方法。这里给CAD加了一个面板工具栏和右键菜单，以及一些命令行
1，这个class1类分别演示了命令行、右键菜单、工具条的实现。注释得非常清楚了，就不做多解释。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Windows.ToolPalette;
using Autodesk.AutoCAD.Windows;
namespace Test
{
public class Class1 : Autodesk.AutoCAD.Runtime.IExtensionApplication
{
ContextMenuExtension m_ContextMenu;//定义右键菜单
PaletteSet palSet;//定义工具栏按钮
//初始化方法，这里加了一个面板工具栏和右键菜单。如果不要右键菜单，注释即可
public void Initialize()
{
AddContextMenu();//添加面板工具栏
AddPalette();//添加右键菜单
}
//卸载方法
public void Terminate()
{
RemoveContextMenu();
}
//有CommandMethod标注，是提供给CAD使用的命令
[CommandMethod("HelloWorld")]
public void HelloWorld()
{
//这段代码的作用是弹出一个提示
Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
ed.WriteMessage("深渊码奴编写：第一个外部门程序CAD！");
}
#region 添加一个右键菜单，并实现画一个圆的功能
/// <summary>点击响应事件，创建一个圆
///
/// </summary>
/// <param name="o"></param>
/// <param name="e"></param>
private void MyMenuItem_OnClick(object o, EventArgs e)
{
using (DocumentLock doclock = Application.DocumentManager.MdiActiveDocument.LockDocument())
{
//创建一个红色的圆
Database db = HostApplicationServices.WorkingDatabase;
using (Transaction trans = db.TransactionManager.StartTransaction())
{
BlockTable bt = trans.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;
BlockTableRecord btr = trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;
Circle cir = new Circle(new Point3d(10, 10, 0), Vector3d.ZAxis, 100);
cir.ColorIndex = 1;
btr.AppendEntity(cir);
trans.AddNewlyCreatedDBObject(cir, true);
trans.Commit();
}
}
}
/// <summary>添加右键菜单项
///
/// </summary>
private void AddContextMenu()
{
m_ContextMenu = new ContextMenuExtension();
m_ContextMenu.Title = "深渊码奴的自定义菜单";
Autodesk.AutoCAD.Windows.MenuItem mi;
mi = new Autodesk.AutoCAD.Windows.MenuItem("创建圆");
//关联菜单项的处理函数
mi.Click += MyMenuItem_OnClick;
m_ContextMenu.MenuItems.Add(mi);
Application.AddDefaultContextMenuExtension(m_ContextMenu);
}
/// <summary>移除菜单项
///
/// </summary>
private void RemoveContextMenu()
{
if (m_ContextMenu != null)
{
Application.RemoveDefaultContextMenuExtension(m_ContextMenu);
m_ContextMenu = null;
}
}
#endregion
[CommandMethod("ShowModalForm")]
public void ShowModalForm()
{
Form1 modalForm = new Form1();
Autodesk.AutoCAD.ApplicationServices.Application.ShowModalDialog(modalForm);
}
[CommandMethod("AddPalette")]
public void AddPalette()
{
Editor ed = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;
try
{
if (palSet == null)
{
palSet = new Autodesk.AutoCAD.Windows.PaletteSet("我的面板集");
palSet.Style = PaletteSetStyles.ShowTabForSingle;
palSet.Style = PaletteSetStyles.NameEditable;
palSet.Style = PaletteSetStyles.ShowPropertiesMenu;
palSet.Style = PaletteSetStyles.ShowAutoHideButton;
palSet.Style = PaletteSetStyles.ShowCloseButton;
palSet.Opacity = 90;
palSet.MinimumSize = new System.Drawing.Size(300, 300);
System.Windows.Forms.UserControl myPageCtrl = new ModelessForm();//注意这里是加载自己写的用户控件
//myPageCtrl.Dock = System.Windows.Forms.DockStyle.Fill;
palSet.Add("我的页面", myPageCtrl);
palSet.Visible = true;
}
}
catch
{
ed.WriteMessage("创建面板集错误");
}
}
}
}
2，CAD展现工具条，添加一个用户控件，取名为ModelessForm。两行代码显示Form1窗体而已。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace Test
{
public partial class ModelessForm : UserControl
{
public ModelessForm()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
Form1 modalForm = new Form1();
Autodesk.AutoCAD.ApplicationServices.Application.ShowModalDialog(modalForm);
}
}
}
3，Form1窗体的功能，是根据长宽画一个矩形，矩形的四个角分别画一个圆。因为在CAD里运行，所以使用的类库和正常C#的不同。这里是实现的重点，根据需要写自己的代码。class1类是一个框架，基本不用改。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Windows.ToolPalette;
using Autodesk.AutoCAD.Windows;
namespace Test
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
float C;//长
float K;//宽
/// <summary> 画CAD图，根据计算出的坐标
///
/// </summary>
void drawCAD()
{
Point3d p0 = new Point3d(0,0,0);
Point3d p1 = new Point3d(C,0,0);
Point3d p2 = new Point3d(C, K, 0);
Point3d p3 = new Point3d(0, K, 0);
using (DocumentLock doclock = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.LockDocument())
{
//
Database db = HostApplicationServices.WorkingDatabase;
using (Transaction trans = db.TransactionManager.StartTransaction())
{
BlockTable bt = trans.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;
BlockTableRecord btr = trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;
//画4条直线的矩形
List<Line> lins = new List<Line>();
lins.Add(new Line(p0, p1));
lins.Add(new Line(p1, p2));
lins.Add(new Line(p2, p3));
lins.Add(new Line(p3, p0));
foreach (Line line in lins)
{
btr.AppendEntity(line);
trans.AddNewlyCreatedDBObject(line, true);
}
//画圆，这里直接用矩形的四个点来画
List<Point3d> points = new List<Point3d>();
points.Add(p0);
points.Add(p1);
points.Add(p2);
points.Add(p3);
List<Circle> cirs = new List<Circle>();
foreach (Point3d p3d in points)
{
int R = 20;
cirs.Add(new Circle(p3d, Vector3d.ZAxis, R));
}
foreach (Circle cir in cirs)
{
cir.ColorIndex = 1;
btr.AppendEntity(cir);
trans.AddNewlyCreatedDBObject(cir, true);
}
trans.Commit();
}
}
}
private void button1_Click(object sender, EventArgs e)
{
this.C = Convert.ToInt32(this.textBox1.Text);//int转成float一定可以，所以可以把int的值直接赋给float
this.K = Convert.ToInt32(this.textBox2.Text);
this.drawCAD();
this.Close();
}
}
}
http://files.cnblogs.com/files/zkp2010/CAD%E6%8F%92%E4%BB%B6%E5%BC%80%E5%8F%91%E2%80%94%E2%80%94%E4%BB%A5CAD2006%E4%B8%BA%E4%BE%8B.rar
CAD插件技术真心不难，无非是画点线条，CAD内部能实现的，C#调用acdbmgd.dll和acmgd.dll也能实现。
原文：https://www.cnblogs.com/domefy/p/15226226.html