https://www.cnblogs.com/gisoracle/archive/2012/02/19/2357925.html
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry; namespace MyFirstProject
{
public class Class1
{
[CommandMethod("HelloNet")]
public void HelloNet()
{
Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
ed.WriteMessage("使用NET开发AutoCAD 程序bygisoracle");
}
[CommandMethod("PickPoint")]
public void PickPoint()
{
//获取Editor 对象
Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
PromptPointOptions promptPtOp = new PromptPointOptions("选择一个点：");
//指定的基点，如果指定了该点，则在选择的时候绘制一条橡皮线。
promptPtOp.BasePoint = new Autodesk.AutoCAD.Geometry.Point3d(, , );
PromptPointResult resPt;
resPt = ed.GetPoint(promptPtOp);
if (resPt.Status == PromptStatus.OK)
{
ed.WriteMessage(" 选择的点为： " + resPt.Value.ToString());
} }
[CommandMethod("createCircle")]
public void createCircle()
{ //首先声明我们要使用的对象
Circle circle; //这个是我们要加入到模型空间的圆
BlockTableRecord btr;//要加入圆，我们必须打开模型空间
BlockTable bt; //要打开模型空间，我们必须通过块表(BlockTable)来访问它 //我们使用一个名为‘Transaction’的对象，把函数中有关数据库的操作封装起来
Transaction trans; //使用TransactionManager的StartTransaction()成员来开始事务处理
trans = HostApplicationServices.WorkingDatabase.TransactionManager.StartTransaction(); //现在创建圆……请仔细看这些参数——注意创建Point3d对象的‘New’和Vector3d的静态成员ZAxis
circle = new Circle(new Point3d(, , ), Vector3d.ZAxis, );
bt = (BlockTable)trans.GetObject(HostApplicationServices.WorkingDatabase.BlockTableId, OpenMode.ForRead); //使用当前的空间Id来获取块表记录——注意我们是打开它用来写入
btr = (BlockTableRecord)trans.GetObject(HostApplicationServices.WorkingDatabase.CurrentSpaceId, OpenMode.ForWrite); //现在使用btr对象来加入圆
btr.AppendEntity(circle);
trans.AddNewlyCreatedDBObject(circle, true); //并确定事务处理知道要加入圆！ //一旦完成以上操作，我们就提交事务处理，这样以上所做的改变就被保存了……
trans.Commit(); //…然后销毁事务处理，因为我们已经完成了相关的操作（事务处理不是数据库驻留对象，可以销毁）
trans.Dispose(); }
[CommandMethod("SelectAPoint")]
public void SelectAPoint()
{
//实例化一个 PromptPointOptions类用来设置提示字符串和其他的一些控制提示
PromptPointOptions prPointOptions = new PromptPointOptions("Select a point");
PromptPointResult prPointRes;
// 实例化一个Editor类，使用GetPoint方法返回
Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
prPointRes = ed.GetPoint(prPointOptions);
if (prPointRes.Status != PromptStatus.OK)
{
ed.WriteMessage("Error");
}
else
{
ed.WriteMessage("选择的点为：" + prPointRes.Value.ToString());
}
}
[CommandMethod("getDistance")]
public void GetDistance()
{
PromptDistanceOptions prDistOptions = new
PromptDistanceOptions("计算两点距离，请选择第一个点：");
PromptDoubleResult prDistRes;
Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
prDistRes = ed.GetDistance(prDistOptions);
if (prDistRes.Status != PromptStatus.OK)
{
ed.WriteMessage("选择错误！");
}
else
{
ed.WriteMessage("两点的距离为：" + prDistRes.Value.ToString());
}
}
[CommandMethod("AddPointAndSetPointStyle")] public static void AddPointAndSetPointStyle()
{
// 获得当前文档和数据库 Get the current document and database
Document acDoc = Application.DocumentManager.MdiActiveDocument;
Database acCurDb = acDoc.Database; // 启动一个事务 Start a transaction
using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
{
// 以只读方式打开块表 Open the Block table for read
BlockTable acBlkTbl;
acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId,
OpenMode.ForRead) as BlockTable; // 以写方式打开模型空间块表记录 Open the Block table record Model space for write
BlockTableRecord acBlkTblRec;
acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace],
OpenMode.ForWrite) as BlockTableRecord; // 在模型空间中创建一个坐标为（4，3，0）的点 Create a point at (4, 3, 0) in Model space
for (int i = ; i < ; i++)
{
DBPoint acPoint = new DBPoint(new Point3d(*i, , )); acPoint.SetDatabaseDefaults(); // 添加新对象到块表记录和事务中 Add the new object to the block table record and the transaction
acBlkTblRec.AppendEntity(acPoint);
acTrans.AddNewlyCreatedDBObject(acPoint, true);
} // 在图形中设置所有点对象的样式 Set the style for all point objects in the drawing
acCurDb.Pdmode = ;
acCurDb.Pdsize = ; // 保存新对象到数据库中 Save the new object to the database
acTrans.Commit();
}
}
[CommandMethod("Add2DSolid")]
public static void Add2DSolid()
{
// 获得当前文档和数据库 Get the current document and database
Document acDoc = Application.DocumentManager.MdiActiveDocument;
Database acCurDb = acDoc.Database; // 启动一个事务 Start a transaction
using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
{
// 以只读方式打开块表 Open the Block table for read
BlockTable acBlkTbl;
acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId,
OpenMode.ForRead) as BlockTable; // 以写方式打开模型空间块表记录 Open the Block table record Model space for write
BlockTableRecord acBlkTblRec;
acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace],
OpenMode.ForWrite) as BlockTableRecord; // Create a quadrilateral (bow-tie) solid in Model space Solid ac2DSolidBow = new Solid(new Point3d(, , ),
new Point3d(, , ),
new Point3d(, , ),
new Point3d(, , )); ac2DSolidBow.SetDatabaseDefaults(); // 添加新对象到块表记录和事务中 Add the new object to the block table record and the transaction
acBlkTblRec.AppendEntity(ac2DSolidBow);
acTrans.AddNewlyCreatedDBObject(ac2DSolidBow, true); // Create a quadrilateral (square) solid in Model space
Solid ac2DSolidSqr = new Solid(new Point3d(, , ),
new Point3d(, , ),
new Point3d(, , ),
new Point3d(, , )); ac2DSolidSqr.SetDatabaseDefaults(); // 添加新对象到块表记录和事务中 Add the new object to the block table record and the transaction
acBlkTblRec.AppendEntity(ac2DSolidSqr);
acTrans.AddNewlyCreatedDBObject(ac2DSolidSqr, true); // 保存新对象到数据库中 Save the new object to the database
acTrans.Commit();
}
} [CommandMethod("AddLine")]
public static void AddLine()
{
// 获得当前文档和数据库 Get the current document and database
Document acDoc = Application.DocumentManager.MdiActiveDocument;
Database acCurDb = acDoc.Database; // 启动一个事务 Start a transaction
using (Transaction acTrans = acCurDb.TransactionManager.StartTransaction())
{
// 以只读方式打开块表 Open the Block table for read
BlockTable acBlkTbl;
acBlkTbl = acTrans.GetObject(acCurDb.BlockTableId,
OpenMode.ForRead) as BlockTable; // 以写方式打开模型空间块表记录 Open the Block table record Model space for write
BlockTableRecord acBlkTblRec;
acBlkTblRec = acTrans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace],
OpenMode.ForWrite) as BlockTableRecord; // 创建一条起点为（5，5，0），终点为（12，3，0）的直线 Create a line that starts at 5,5 and ends at 12,3
Line acLine = new Line(new Point3d(, , ),
new Point3d(, , )); acLine.SetDatabaseDefaults(); // 添加新对象到块表记录和事务中 Add the new object to the block table record and the transaction
acBlkTblRec.AppendEntity(acLine);
acTrans.AddNewlyCreatedDBObject(acLine, true); // 保存新对象到数据库中 Save the new object to the database
acTrans.Commit();
} }
}
}