推荐net开发cad入门阅读代码片段

时间：2024-07-26 19:04:14

转载自  Cad人生  的博客

链接：http://www.cnblogs.com/cadlife/articles/2668158.html

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 using System;

 using System.Collections.Generic;

 using System.Text;

 using Autodesk.AutoCAD.EditorInput ;

 using Autodesk.AutoCAD.Runtime ;

 using Autodesk.AutoCAD.ApplicationServices;

 using Autodesk.AutoCAD.DatabaseServices ;

 namespace CH02

 {

     public class Class1

     {

         //--------------------------------------------------------------

         // 功能:获取用户输入

         // 作者：

         // 日期：2007-7-20

         // 说明：

         //

         //----------------------------------------------------------------

         [CommandMethod("GetData")]

         public void GetData()

         {

             //获取Editor对象

             Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;

             //获取整型数据

             PromptIntegerOptions intOp = new PromptIntegerOptions("请输入多边形的边数：");

             PromptIntegerResult intRes;

             intRes = ed.GetInteger(intOp);

             //判断用户输入

             if (intRes.Status == PromptStatus.OK)

             {

                 int nSides = intRes.Value;

                 ed.WriteMessage("多边形的边数为：" + nSides);

             } if (intRes.Status == PromptStatus.Cancel)

             {

                 ed.WriteMessage("用户按了取消ESC键/n" );

             }

         }

         //--------------------------------------------------------------

         // 功能:要求用户输入点

         // 作者：

         // 日期：2007-7-20

         // 说明：

         //

         //----------------------------------------------------------------

    [CommandMethod("PickPoint")]

         static 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());

        }

             }

             //--------------------------------------------------------------

             // 功能:获取选择集

             // 作者：

             // 日期：2007-7-20

             // 说明：

             //

             //----------------------------------------------------------------

    [CommandMethod("SelectEnt")]

         static public void SelectEnt()

    {

                 //获取Editor对象

                Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;

                PromptSelectionOptions selectionOp = new PromptSelectionOptions();

                PromptSelectionResult ssRes = ed.GetSelection(selectionOp);

                if (ssRes.Status == PromptStatus.OK)

                {

                    SelectionSet SS = ssRes.Value;

                    int nCount = SS.Count;

                    ed.WriteMessage("选择了{0}个实体"  , nCount);

                }

             }

             //--------------------------------------------------------------

             // 功能:获取选择集（带过滤）

             // 作者：

             // 日期：2007-7-20

             // 说明：

             //

             //----------------------------------------------------------------

           [CommandMethod("SelectEnt2")]

         static public void SelectEnt2()

    {

                 //获取Editor对象

                Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;

                 // 定义选择集选项

                PromptSelectionOptions selectionOp = new PromptSelectionOptions();

                  //创建选择集过滤器，只选择块对象

                 TypedValue[] filList = new TypedValue[];

                 filList[] = new TypedValue((int)DxfCode.Start, "INSERT");

                SelectionFilter filter = new SelectionFilter(filList);

                PromptSelectionResult ssRes = ed.GetSelection(selectionOp, filter);

                if (ssRes.Status == PromptStatus.OK)

                {

                    SelectionSet SS = ssRes.Value;

                    int nCount = SS.Count;

                    ed.WriteMessage("选择了{0}个块"  , nCount);

                }

             }

        }

   }
using System;

using System.Collections.Generic;

using System.Text;

using Autodesk.AutoCAD.EditorInput;

using Autodesk.AutoCAD.Runtime;

using Autodesk.AutoCAD.ApplicationServices;

using Autodesk.AutoCAD.DatabaseServices;

using Autodesk.AutoCAD.Geometry;

namespace CH03

{

    public class Class1

    {

        //--------------------------------------------------------------

        // 功能:创建一个新层

        // 作者：

        // 日期：2007-7-20

        // 说明：

        //

        //----------------------------------------------------------------

        [CommandMethod("CreateLayer")]

        public void CreateLayer()

        {

            ObjectId layerId;

            Database db = HostApplicationServices.WorkingDatabase;

            //开始一个事务

            Transaction trans = db.TransactionManager.StartTransaction();

            try

            {

                //首先取得层表

                LayerTable lt = (LayerTable)trans.GetObject(db.LayerTableId, OpenMode.ForWrite);

                //检查MyLayer层是否存在

                if (lt.Has("MyLayer"))

                {

                    layerId = lt["MyLayer"];

                }

                else

                {

                    //如果MyLayer层不存在，就创建它

                    LayerTableRecord ltr = new LayerTableRecord();

                    ltr.Name = "MyLayer"; //设置层的名字

                    layerId = lt.Add(ltr);

                    trans.AddNewlyCreatedDBObject(ltr, true);

                }

                //提交事务

                trans.Commit();

            }

            catch (Autodesk.AutoCAD.Runtime.Exception e)

            {

                //放弃事务

                trans.Abort();

            }

            finally

            {

                // 显式地释放

                trans.Dispose();

            }

        }

        //--------------------------------------------------------------

        // 功能:创建一个圆

        // 作者：

        // 日期：2007-7-20

        // 说明：

        //

        //----------------------------------------------------------------

        [CommandMethod("CreateCircle")]

        public void  CreateCircle()

        {

            Database db = HostApplicationServices.WorkingDatabase;

            // 使用 "using" ，结束是自动调用事务的 "Dispose"

            using (Transaction trans = db.TransactionManager.StartTransaction())

            {

                //获取块表和模型空间

                BlockTable bt = (BlockTable)(trans.GetObject(db.BlockTableId, OpenMode.ForRead));

                BlockTableRecord btr = (BlockTableRecord)trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);

                //创建一个圆并添加到块表记录（模型空间）

                Point3d center = new Point3d(, , );

                Circle circle = new Circle(center, Vector3d.ZAxis, 10.0);

                circle.ColorIndex = ;

                btr.AppendEntity(circle);

                trans.AddNewlyCreatedDBObject(circle, true);

                trans.Commit();

            }

        }

        //--------------------------------------------------------------

        // 功能:创建一个块定义（块表记录）

        // 作者：

        // 日期：2007-7-20

        // 说明：

        //

        //----------------------------------------------------------------

        public ObjectId CreateBlkDef()

        {

            //定义函数的返回值ObjectId

            ObjectId blkObjId = new ObjectId();

            Database db = HostApplicationServices.WorkingDatabase;

            // 使用 "using"关键字指定事务的边界

            using (Transaction trans = db.TransactionManager.StartTransaction())

            {

                //获取块表

                BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForWrite);

                //通过块名myBlkName判断块表中是否包含块表记录

                if ((bt.Has("myBlkName")))

                {

                    blkObjId = bt["myBlkName"];//如果已经存在，通过块名获取块对应的ObjectId

                }

                else

                {

                    //创建一个圆

                    Point3d center = new Point3d(, , );

                    Circle circle = new Circle(center, Vector3d.ZAxis, );

                    circle.ColorIndex = ;

                    //创建文本Text:

                    MText text = new MText();

                    text.Contents = " ";

                    text.Location = center;

                    text.ColorIndex = ;

                    //创建新的块表记录 myBlkName

                    BlockTableRecord newBtr = new BlockTableRecord();

                    newBtr.Name = "myBlkName";

                    newBtr.Origin = center;

                    //保存块表记录到块表

                    blkObjId = bt.Add(newBtr); // 返回块对应的ObjectId

                    trans.AddNewlyCreatedDBObject(newBtr, true); //Let the transaction know about any object/entity you add to the database!

                    //保存新创建的实体到块表记录

                    newBtr.AppendEntity(circle);

                    newBtr.AppendEntity(text);

                    // 通知事务新创建了对象

                    trans.AddNewlyCreatedDBObject(circle, true);

                    trans.AddNewlyCreatedDBObject(text, true);

                }

                trans.Commit(); //提交事务

            }

            return blkObjId;

        }

        //--------------------------------------------------------------

        // 功能:创建一个块引用

        // 作者：

        // 日期：2007-7-20

        // 说明：

        //

        //----------------------------------------------------------------

        [CommandMethod("CreateBlk")]

        public void CreateBlkRef()

        {

            //获取块的插入点

            Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;

            PromptPointOptions ptOps = new PromptPointOptions("选择块的插入点");

            PromptPointResult ptRes;

            ptRes = ed.GetPoint(ptOps);

            Point3d ptInsert;

            if (ptRes.Status == PromptStatus.OK)

            {

                ptInsert = ptRes.Value ;

            }

            else

            {

                ptInsert = new Point3d(, , );

            }

            Database db = HostApplicationServices.WorkingDatabase;

            // 使用 "using"关键字指定事务的边界

            using (Transaction trans = db.TransactionManager.StartTransaction())

            {

                //获取块表和模型空间

                BlockTable bt = (BlockTable)(trans.GetObject(db.BlockTableId, OpenMode.ForWrite));

                BlockTableRecord btr = (BlockTableRecord)trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);

                //创建块引用

                BlockReference blkRef = new BlockReference(ptInsert,CreateBlkDef());// 指定插入点和所引用的块表记录

                blkRef.Rotation = 1.57;//指定旋转角，按弧度

                //保存新创建的块引用到模型空间

                btr.AppendEntity(blkRef);

                trans.AddNewlyCreatedDBObject(blkRef, true);    // 通知事务新创建了对象

                trans.Commit(); //提交事务

            }

        }

        //--------------------------------------------------------------

        // 功能:读取对象的属性

        // 作者：

        // 日期：2007-7-20

        // 说明：

        //

        //----------------------------------------------------------------

        [CommandMethod("OpenEnt")]

        public void OpenEnt()

        {

            Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;

            PromptEntityOptions entOps = new PromptEntityOptions("选择要打开的对象");

            PromptEntityResult entRes;

            entRes = ed.GetEntity(entOps);

            if (entRes.Status != PromptStatus.OK)

            {

                ed.WriteMessage("选择对象失败，退出");

                return;

            }

            ObjectId objId = entRes.ObjectId;

            Database db = HostApplicationServices.WorkingDatabase;

            using (Transaction trans = db.TransactionManager.StartTransaction())

            {

                Entity ent = (Entity)trans.GetObject(objId, OpenMode.ForWrite);

                ent.ColorIndex = ;

                trans.Commit();

            }

        }

    }

}
 using System;

 using System.Collections.Generic;

 using System.Text;

 using Autodesk.AutoCAD.EditorInput;

 using Autodesk.AutoCAD.Runtime;

 using Autodesk.AutoCAD.ApplicationServices;

 using Autodesk.AutoCAD.DatabaseServices;

 using Autodesk.AutoCAD.Geometry;

 namespace CH04

 {

     public class Class1

     {

         //--------------------------------------------------------------

         // 功能:通过ObjectId打开对象

         // 作者：

         // 日期：2007-7-20

         // 说明：

         //

         //----------------------------------------------------------------

         [CommandMethod("OpenEnt")]

         public void OpenEnt()

         {

             Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;

             ed.WriteMessage("通过ObjectId打开对象\n");

             PromptEntityOptions entOps = new PromptEntityOptions("选择要打开的对象\n");

             PromptEntityResult entRes;

             entRes = ed.GetEntity(entOps);

             if (entRes.Status != PromptStatus.OK)

             {

                 ed.WriteMessage("选择对象失败，退出");

                 return;

             }

             ObjectId objId = entRes.ObjectId;

             Database db = HostApplicationServices.WorkingDatabase;

             using (Transaction trans = db.TransactionManager.StartTransaction())

             {

                 Entity ent = trans.GetObject(objId, OpenMode.ForWrite) as Entity ;

                 ent.ColorIndex = ;

                 trans.Commit();

             }

         }

         //--------------------------------------------------------------

         // 功能:类型识别和转换

         // 作者：

         // 日期：2007-7-20

         // 说明：

         //

         //----------------------------------------------------------------

         [CommandMethod("GetType")]

         public void GetType()

         {

             Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;

             ed.WriteMessage("数据库对象的类型识别和转换\n");

             PromptEntityOptions entOps = new PromptEntityOptions("选择要打开的对象");

             PromptEntityResult entRes;

             entRes = ed.GetEntity(entOps);

             if (entRes.Status != PromptStatus.OK)

             {

                 ed.WriteMessage("选择对象失败，退出");

                 return;

             }

             ObjectId objId = entRes.ObjectId;

             Database db = HostApplicationServices.WorkingDatabase;

             using (Transaction trans = db.TransactionManager.StartTransaction())

             {

                 Entity ent = trans.GetObject(objId, OpenMode.ForWrite) as Entity;

                 ed.WriteMessage("ent.GetRXClass().Name :" + ent.GetRXClass().Name + "\n");

                 if (ent is Line)

                 {

                     Line aLine = ent as Line;

                     aLine.ColorIndex = ;

                 }

                 else if (ent.GetType() == typeof(Circle))

                 {

                     Circle cir = (Circle)ent;

                     cir.ColorIndex = ;

                 }

                 trans.Commit();

             }

         }

         //--------------------------------------------------------------

         // 功能:实体对象的属性

         // 作者：

         // 日期：2007-7-20

         // 说明：

         //

         //----------------------------------------------------------------

         [CommandMethod("EntPro")]

         public void EntPro()

         {

             Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;

             ed.WriteMessage("实体对象的属性\n");

             PromptEntityOptions entOps = new PromptEntityOptions("选择要打开的对象\n");

             PromptEntityResult entRes;

             entRes = ed.GetEntity(entOps);

             if (entRes.Status != PromptStatus.OK)

             {

                 ed.WriteMessage("选择对象失败，退出\n");

                 return;

             }

             ObjectId objId = entRes.ObjectId;

             Database db = HostApplicationServices.WorkingDatabase;

             using (Transaction trans = db.TransactionManager.StartTransaction())

             {

                 Entity ent = trans.GetObject(objId, OpenMode.ForWrite) as Entity;

                 ed.WriteMessage("获取或设置实体的线型\n");

                 ed.WriteMessage("实体的原先的线型为 :" + ent.Linetype + "\n");

                 // 获取线型表记录

                 LinetypeTable lineTypeTbl = trans.GetObject(db.LinetypeTableId, OpenMode.ForRead) as LinetypeTable;

                 // 确保DOT线型名已经加载到当前数据库

                 LinetypeTableRecord lineTypeTblRec = trans.GetObject(lineTypeTbl["DOT"], OpenMode.ForRead) as LinetypeTableRecord;

                 // 设置实体的线型

                 ent.LinetypeId = lineTypeTblRec.ObjectId;

                 // 设置实体的线型比例

                 ed.WriteMessage("设置实体的线型比例为2.0\n");

                 ent.LinetypeScale = 2.0;

                 //设置实体的可见性

                 ent.Visible = true;

                  //设置实体所在的层

                 ed.WriteMessage("实体的原先所在的层为 :" + ent.Layer + "\n");

                 ent.Layer = "layer0";

                 trans.Commit();

             }

         }

     }

 }
 using System;

 using System.Collections.Generic;

 using System.Text;

 using System.Collections;

 using Autodesk.AutoCAD.EditorInput;

 using Autodesk.AutoCAD.Runtime;

 using Autodesk.AutoCAD.ApplicationServices;

 using Autodesk.AutoCAD.DatabaseServices;

 using Autodesk.AutoCAD.Geometry;

 namespace CH05

 {

     public class Class1

     {

          //--------------------------------------------------------------

         // 功能:添加扩展数据XDATA

         // 作者：

         // 日期：2007-7-20

         // 说明：

         //

         //----------------------------------------------------------------

         [CommandMethod("AddXData")]

         public void AddXData()

         {

             Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;

             ed.WriteMessage("添加扩充数据XDATA\n");

             PromptEntityOptions entOps = new PromptEntityOptions("选择要打开的对象\n");

             PromptEntityResult entRes;

             entRes = ed.GetEntity(entOps);

             if (entRes.Status != PromptStatus.OK)

             {

                 ed.WriteMessage("选择对象失败，退出");

                 return;

             }

             ObjectId objId = entRes.ObjectId;

             Database db = HostApplicationServices.WorkingDatabase;

             using (Transaction trans = db.TransactionManager.StartTransaction())

             {

                 Entity ent = trans.GetObject(objId, OpenMode.ForWrite) as Entity ;

                 ent.ColorIndex = ;

                 RegAppTable appTbl = trans.GetObject(db.RegAppTableId, OpenMode.ForWrite) as RegAppTable ;

                 if (!appTbl.Has("MyAppName"))

                 {

                     RegAppTableRecord appTblRcd = new RegAppTableRecord();

                     appTblRcd.Name = "MyAppName";

                     appTbl.Add(appTblRcd);

                     trans.AddNewlyCreatedDBObject(appTblRcd, true);

                 }

                 ResultBuffer resBuf = new ResultBuffer();//new TypedValue(1001, "MyAppName"), new TypedValue(1000, "开发部门"));

                 resBuf.Add(new TypedValue(, "MyAppName"));//注册程序名称

                 resBuf.Add(new TypedValue( , " 张三"));//姓名

                 resBuf.Add(new TypedValue( , " 工程部"));//部门

                 resBuf.Add(new TypedValue(, 2000.0));//薪水

                 ent.XData =  resBuf;

                 trans.Commit();

             }

         }

         //--------------------------------------------------------------

         // 功能:获取扩展数据XDATA

         // 作者：

         // 日期：2007-7-20

         // 说明：

         //

         //------------------------------------------------------------

         [CommandMethod("GETXDATA")]

         public void GETXDATA()

         {

             Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;

             ed.WriteMessage("获取扩充数据XDATA\n");

             PromptEntityOptions entOps = new PromptEntityOptions("选择带扩展数据的对象");

             PromptEntityResult entRes = ed.GetEntity(entOps);

             if (entRes.Status != PromptStatus.OK)

             {

                 ed.WriteMessage("选择对象失败，退出");

                 return;

             }

             Database db = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Database;

             using (Transaction trans = db.TransactionManager.StartTransaction())

             {

                 Entity ent = (Entity)trans.GetObject(entRes.ObjectId, OpenMode.ForRead);

                 ResultBuffer resBuf = ent.XData;

                 if (resBuf != null)

                 {

                     //

                     IEnumerator iter = resBuf.GetEnumerator();

                     while (iter.MoveNext())

                     {

                         TypedValue tmpVal = (TypedValue)iter.Current;

                         ed.WriteMessage(tmpVal.TypeCode.ToString() + ":");

                         ed.WriteMessage(tmpVal.Value.ToString() + "\n");

                     }

                 }

             }

         }

         //--------------------------------------------------------------

         // 功能:在命名对象词典中添加数据

         // 作者：

         // 日期：2007-7-20

         // 说明：

         //

         //------------------------------------------------------------

         [CommandMethod("AddInNOD")]

         public void AddInNOD()

         {

             Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;

             ed.WriteMessage("在命名对象词典中添加数据\n");

             Database db = HostApplicationServices.WorkingDatabase;

             using (Transaction trans = db.TransactionManager.StartTransaction())

             {

                 //获取命名对象词典（NOD)

                 DBDictionary NOD =trans.GetObject(db.NamedObjectsDictionaryId, OpenMode.ForWrite) as DBDictionary ;

                 // 声明一个新的词典

                 DBDictionary copyrightDict;

                 // 判断是否存在COPYRIGHT词典，没有则创建

                 try

                 {

                     // 获取COPYRIGHT词典

                     copyrightDict = (DBDictionary)trans.GetObject(NOD.GetAt("COPYRIGHT"), OpenMode.ForRead);

                 }

                 catch

                 {

                     //在NOD下创建COPYRIGHT词典

                     copyrightDict = new DBDictionary();

                     NOD.SetAt("COPYRIGHT", copyrightDict);

                     trans.AddNewlyCreatedDBObject(copyrightDict, true);

                 }

                 // 在copyrightDict中，获取或创建 "author" 词典

                 DBDictionary authorDict;

                 try

                 {

                     authorDict = (DBDictionary)trans.GetObject(copyrightDict.GetAt("Author"), OpenMode.ForWrite);

                 }

                 catch

                 {

                     authorDict = new DBDictionary();

                     //"author" doesn't exist, create one

                     copyrightDict.UpgradeOpen();

                     copyrightDict.SetAt("Author", authorDict);

                     trans.AddNewlyCreatedDBObject(authorDict, true);

                 }

                 // 通过Xrecord和ResultBuffer添加扩展数据

                 Xrecord authorRec;

                 try

                 {

                     authorRec = (Xrecord)trans.GetObject(authorDict.GetAt("AuthorInfo"), OpenMode.ForWrite);

                 }

                 catch

                 {

                     authorRec = new Xrecord();

                     authorRec.Data = new ResultBuffer(new TypedValue((int)DxfCode.Text, "张三"));

                     authorDict.SetAt("AuthorInfo", authorRec);

                     trans.AddNewlyCreatedDBObject(authorRec, true);

                 }

                 trans.Commit();

             }

         }

         //--------------------------------------------------------------

         // 功能:获取命名对象词典中的数据

         // 作者：

         // 日期：2007-7-20

         // 说明：

         //

         //------------------------------------------------------------

         [CommandMethod("GetInNOD")]

         public void GetInNod()

         {

             Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;

             ed.WriteMessage("获取命名对象词典中数据\n");

             Database db = HostApplicationServices.WorkingDatabase;

             using (Transaction trans = db.TransactionManager.StartTransaction())

             {

                 // 获取NOD

                 DBDictionary NOD = (DBDictionary)trans.GetObject(db.NamedObjectsDictionaryId, OpenMode.ForRead, false);

                 // 获取COPYRIGHT词典

                 DBDictionary copyrightDict = (DBDictionary)trans.GetObject(NOD.GetAt("COPYRIGHT"), OpenMode.ForRead);

                 // 获取Author词典

                 DBDictionary AuthorDict = (DBDictionary)trans.GetObject(copyrightDict.GetAt("Author"), OpenMode.ForRead);

                 // 获取AuthorInfo扩展记录Xrecord

                 Xrecord authorXRec = (Xrecord)trans.GetObject(AuthorDict.GetAt("AuthorInfo"), OpenMode.ForRead);

                 ResultBuffer resBuf = authorXRec.Data;

                 TypedValue val = resBuf.AsArray()[];

                 ed.WriteMessage("该图纸由{0}设计\n", val.Value);

             }

         }

         //--------------------------------------------------------------

         // 功能:添加数据到数据库对象的扩展词典中

         // 作者：

         // 日期：2007-7-20

         // 说明：

         //

         //------------------------------------------------------------

         [CommandMethod("AddExtDict")]

         public void AddExtDict()

         {

             Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;

             ed.WriteMessage("创建对象扩展词典\n");

             PromptEntityOptions entOps = new PromptEntityOptions("选择要添加扩展数据的块\n");

             PromptEntityResult entRes = ed.GetEntity(entOps);

             if (entRes.Status != PromptStatus.OK)

             {

                 ed.WriteMessage("选择对象失败，退出");

                 return;

             }

             Database db = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Database;

             using (Transaction trans = db.TransactionManager.StartTransaction())

             {

                 DBObject obj = trans.GetObject(entRes.ObjectId, OpenMode.ForWrite) as DBObject;

                 BlockReference blkRef;

                 if (obj is BlockReference)

                 {

                     blkRef = obj as BlockReference;

                 }

                 else

                 {

                     return;

                 }

                 // 创建对象的扩展词典

                 blkRef.CreateExtensionDictionary();

                 DBDictionary extensionDict = (DBDictionary)trans.GetObject(blkRef.ExtensionDictionary, OpenMode.ForWrite, false);

                 // 通过Xrecord准备附加属性数据

                 Xrecord xRec = new Xrecord();

                 xRec.Data = new ResultBuffer(

                   new TypedValue((int)DxfCode.Text, "张三"),// 姓名

                   new TypedValue((int)DxfCode.Real, 1200.0),//薪水

                   new TypedValue((int)DxfCode.Text, "技术部"));// 部门

                // 在扩展词典中添加扩展记录

                 extensionDict.SetAt("EmployeeInfomation", xRec);

                 trans.AddNewlyCreatedDBObject(xRec, true);

                 trans.Commit();

             }

         }

         //--------------------------------------------------------------

         // 功能:获取数据库对象的扩展词典中的数据

         // 作者：

         // 日期：2007-7-20

         // 说明：

         //

         //------------------------------------------------------------

         [CommandMethod("GetExtDict")]

         public void GetExtDict()

         {

             Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;

             ed.WriteMessage("获取对象扩展词典信息\n");

             PromptEntityOptions entOps = new PromptEntityOptions("选择添加了扩展数据的块\n");

             PromptEntityResult entRes = ed.GetEntity(entOps);

             if (entRes.Status != PromptStatus.OK)

             {

                 ed.WriteMessage("选择对象失败，退出");

                 return;

             }

             Database db = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Database;

             using (Transaction trans = db.TransactionManager.StartTransaction())

             {

                 DBObject obj = trans.GetObject(entRes.ObjectId, OpenMode.ForWrite) as DBObject;

                 BlockReference blkRef;

                 if (obj is BlockReference)

                 {

                     blkRef = obj as BlockReference;

                 }

                 else

                 {

                     ed.WriteMessage("选择对象不是块，退出\n");

                     return;

                 }

                 // 创建对象的扩展词典

                 DBDictionary extensionDict = (DBDictionary)trans.GetObject(blkRef.ExtensionDictionary, OpenMode.ForWrite, false);

                 // 获取AuthorInfo扩展记录Xrecord

                 Xrecord EmpXRec = (Xrecord)trans.GetObject(extensionDict.GetAt("EmployeeInfomation"), OpenMode.ForRead);

                 ResultBuffer resBuf = EmpXRec.Data;

                 TypedValue val = resBuf.AsArray()[];

                 ed.WriteMessage("是员工姓名:{0}\n", val.Value);

                 val = resBuf.AsArray()[];

                 ed.WriteMessage("该员工的薪水:{0}\n", val.Value);

                 val = resBuf.AsArray()[];

                 ed.WriteMessage("该员工属于:{0}\n", val.Value);

                 trans.Commit();

             }

         }

     }

 }

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