cad二次开发的一些简单入门实例

[摘要] 记录一下CAD二次开发的一些简单实例。1、helloworld2、画一个圆3、画一条直线4、取得图层下的所有对象id5、得到当前图层的所有object

记录一下CAD二次开发的一些简单实例。
1、helloworld
2、画一个圆
3、画一条直线
4、取得图层下的所有对象id
5、得到当前图层的所有object的id
6、取得当前所有图层名称
7、添加图层

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;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;using System.Reflection;namespace cad开发{ public class Class1 { /// <summary> /// Hello World!!! /// </summary> [CommandMethod("HelloWorld")] public void HelloWorld() { Editor ed = AcadApp.DocumentManager.MdiActiveDocument.Editor; ed.WriteMessage("Hello World222"); } /// <summary> /// 画一个圆 /// </summary> [CommandMethod("test")] 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(10, 10, 0), Vector3d.ZAxis, 2); 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(); } /// <summary> /// 选择一个点，并显示坐标；选择两个点，并显示距离 /// </summary> [CommandMethod("selectPoint")] public void SelectPoint() { PromptPointOptions prPointOptions = new PromptPointOptions("Select a point"); PromptPointResult prPointRes; Editor ed = AcadApp.DocumentManager.MdiActiveDocument.Editor; prPointRes = ed.GetPoint(prPointOptions); if (prPointRes.Status != PromptStatus.OK) { ed.WriteMessage("Error"); } else ed.WriteMessage("You selected point:"+ prPointRes.Value.ToString()); PromptDistanceOptions prDistOptions = new PromptDistanceOptions("Find distance, select first point:"); PromptDoubleResult prDistRes; prDistRes = ed.GetDistance(prDistOptions); if (prDistRes.Status != PromptStatus.OK) { ed.WriteMessage("Error"); } else { ed.WriteMessage("The distance is:"+ prDistRes.Value.ToString()); } } [CommandMethod("CreateDivision")] public void CreateDivision() { Database db = HostApplicationServices.WorkingDatabase; Transaction trans = db.TransactionManager.StartTransaction(); try { //首先，获取 NOD…… DBDictionary NOD = (DBDictionary)trans.GetObject(db.NamedObjectsDictionaryId, OpenMode.ForWrite); //定义一个公司级别的字典 DBDictionary acmeDict; try { //如果 ACME_DIVISION 不存在，则转到 catch 块，这里什幺也不做 acmeDict = (DBDictionary)trans.GetObject(NOD.GetAt("ACME_DIVISION"), OpenMode.ForRead); } catch { //如果 ACME_DIVISION 不存在，则创建它并把它加入到 NOD 中…… acmeDict = new DBDictionary(); NOD.SetAt("ACME_DIVISION", acmeDict); trans.AddNewlyCreatedDBObject(acmeDict, true); } trans.Commit(); } finally { trans.Dispose(); } } /// <summary> /// 画一条直线 /// </summary> [CommandMethod("FirstLine")] public static void FirstLine() { //获取当前活动图形数据库 HostApplicationServices.WorkingDatabase; Database db = HostApplicationServices.WorkingDatabase; //定义一个指向当前数据库的事务处理，以添加直线 using (Transaction trans = db.TransactionManager.StartTransaction()) { BlockTable acBlkTbl; acBlkTbl = trans.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable; //以读方式打开块表. //以写方式打开模型空间块表记录. BlockTableRecord acBlkTblRec; acBlkTblRec = trans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord; Point3d startPoint = new Point3d(0, 100, 0); //直线起点 Point3d endPoint = new Point3d(100, 100, 0); //直线终点 Line line = new Line(startPoint, endPoint); //新建一直线对象 //将图形对象的信息添加到块表记录中,并返回ObjectId对象. acBlkTblRec.AppendEntity(line); trans.AddNewlyCreatedDBObject(line, true); //把对象添加到事务处理中. trans.Commit(); //提交事务处理 } } #region"取得图层下的所有对象id"/// <summary> /// 取得图层下的所有对象id /// </summary> /// <param name="name">图层名称</param> /// <returns>id集合</returns> public ObjectIdCollection GetObjectIdsAtLayer(string name) { ObjectIdCollection ids = new ObjectIdCollection(); PromptSelectionResult ProSset = null; TypedValue[] filList = new TypedValue[1] { new TypedValue((int)DxfCode.LayerName, name) }; SelectionFilter sfilter = new SelectionFilter(filList); Editor ed = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor; ProSset = ed.SelectAll(sfilter); if (ProSset.Status == PromptStatus.OK) { SelectionSet sst = ProSset.Value; ObjectId[] oids = sst.GetObjectIds(); for (int i = 0; i < oids.Length; i++) { ids.Add(oids[i]); } } return ids; } #endregion /// <summary> /// 得到当前图层的所有几何的id /// </summary> [CommandMethod("GetAllId")] public void GetAllId() { Editor ed = AcadApp.DocumentManager.MdiActiveDocument.Editor; ObjectIdCollection ids = GetObjectIdsAtLayer("0"); string str =""; Database db = HostApplicationServices.WorkingDatabase; //定义一个指向当前数据库的事务处理，以添加直线 using (Transaction trans = db.TransactionManager.StartTransaction()) { BlockTable acBlkTbl; acBlkTbl = trans.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable; //以读方式打开块表. //以写方式打开模型空间块表记录. BlockTableRecord acBlkTblRec; acBlkTblRec = trans.GetObject(acBlkTbl[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord; foreach (ObjectId item in ids) { Entity entity = (Entity)item.GetObject(OpenMode.ForRead, false, false); switch (entity.GetRXClass().Name) { case"AcDbText": DBText dbtext = entity as DBText; string strtext = dbtext.TextString; str += strtext + 'n'; break; } } ed.WriteMessage(str); trans.Commit(); //提交事务处理 } } #region"取得当前所有图层名称"/// <summary> /// 取得当前所有图层名称 /// </summary> /// <returns>图层名称集合</returns> [CommandMethod("GetAllLayer")] public ArrayList GetLayerName() { ArrayList layers = new ArrayList(); using (Database db = HostApplicationServices.WorkingDatabase) { using (Transaction trans = db.TransactionManager.StartTransaction()) { using (LayerTable lt = (LayerTable)trans.GetObject(db.LayerTableId, OpenMode.ForRead)) { foreach (ObjectId id in lt) { LayerTableRecord ltr = (LayerTableRecord)trans.GetObject(id, OpenMode.ForRead); layers.Add(ltr.Name); } } trans.Commit(); } } return layers; } #endregion #region 添加图层 /// <summary> /// 添加图层 /// </summary> /// <param name="layName"></param> /// <param name="layColor"></param> private ObjectId AddLayer(string layName, short layColor) { ObjectId oidReturn = new ObjectId(); ; using (Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.LockDocument()) { Database database = HostApplicationServices.WorkingDatabase; Editor editor = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor; using (Transaction transaction = database.TransactionManager.StartTransaction()) { try { ObjectId id; LayerTable table = transaction.GetObject(database.LayerTableId, OpenMode.ForWrite) as LayerTable; LayerTableRecord record = new LayerTableRecord(); if (table.Has(layName)) { id = table.Id; record = transaction.GetObject(id, OpenMode.ForWrite) as LayerTableRecord; record.IsOff = false; record.IsLocked = false; if (id != database.Clayer) { record.IsFrozen = false; } } else { record.Name = layName; id = table.Add(record); transaction.AddNewlyCreatedDBObject(record, true); } record.Color = Autodesk.AutoCAD.Colors.Color.FromColorIndex(ColorMethod.ByColor, layColor); database.Clayer = id; oidReturn = id; transaction.Commit(); } catch (Autodesk.AutoCAD.Runtime.Exception exception) { editor.WriteMessage("Error in addLayer2():"+ exception.Message); } } return oidReturn; } } #endregion }}