C#控制CAD绘制基础教程：文本与多边形实例

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.Windows;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Colors;
using Autodesk.AutoCAD.EditorInput;
using System.Collections;
using AcadApp = Autodesk.AutoCAD.ApplicationServices.Application;

namespace test
{
    public class Class1
    {
        [CommandMethod("AddSimpleEntity",CommandFlags.Session)]
        public void AddSimpleEntity()
        {

      

            ToModelSpace(DBText(new Point3d(-10, 20, 0), "数字建筑网(www.BimCad.org)", 5));//创建一个基点为(-10, 20, 0)，文字高度为5的文字
            Point3dCollection pc = new Point3dCollection(new Point3d[] { new Point3d(20, 10, 0), new Point3d(35, -5, 0), new Point3d(60, 5, 0), new Point3d(80, 0, 0) });
            Polyline3d pl = new Polyline3d(Poly3dType.QuadSplinePoly, pc, true);
            ToModelSpace(pl);
            NewDrawing();
            Circle cir = new Circle(Point3d.Origin, Vector3d.ZAxis, 15);//创建圆