cad二次开发(块表的创建) (1)

实验三、块表的创建

一．实验目的：

通过本次掌握块表的基本创建方法

二．实验内容：

1、创建块表的定义及块表参照的插入

2、创建带有属性的块表及其带有属性块表的插入

3、在对话框中查看块定义的图标

4、在当前文件中插入外部文件的块

5、在当前文件中插入其他的DWG文件

三．实验步骤：

1、创建块表

代码：

public class Block {

public Document document =

Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;

Transaction transaction; Database db;

BlockTable blocktable; Editor ed =

Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument. Editor;

public void StartTransaction()

{ db = document.Database;

transaction = db.TransactionManager.StartTransaction();

}

[CommandMethod("createblock")]

public void CreateBlock()

{

StartTransaction();

try

{

blocktable = (BlockTable)transaction.GetObject(db.BlockTableId, OpenMode.ForWrite);

BlockTableRecord blocktableRecord = new BlockTableRecord();

string blockName = "我的块表";

= blockName;

blocktableRecord.Origin = new Point3d(0, 0, 0);

Point3d center = new Point3d(0, 0, 0);

DBPoint dbpoint = new DBPoint(center);

Circle circle = new Circle(center, new Vector3d(0, 0, 1), 0.25);

Polyline triangle = new Polyline(4);

triangle.AddVertexAt(0, new Point2d(0, 1), 0, 0, 0);

triangle.AddVertexAt(1, new Point2d(0.866, -0.5), 0, 0, 0);

triangle.AddVertexAt(2, new Point2d(-0.866, -0.5), 0, 0, 0);

triangle.AddVertexAt(3, new Point2d(0, 1), 0, 0, 0);

blocktableRecord.Origin = new Point3d(0, 0, 0);

blocktableRecord.AppendEntity(dbpoint);

blocktableRecord.AppendEntity(circle);

blocktableRecord.AppendEntity(triangle);

blocktable.Add(blocktableRecord);

transaction.AddNewlyCreatedDBObject(blocktableRecord, true);

CreateBlockIcon createBlockIcon = new CreateBlockIcon(blockName); mit();

}

2、创建块表参照

代码：

[CommandMethod("insertblk")]

public void InsertBlock()

{

StartTransaction();

BlockTable blocktable =

(BlockTable)transaction.GetObject(db.BlockTableId, OpenMode.ForWrite);

BlockTableRecord blockTblRec =

(BlockTableRecord)transaction.GetObject(blocktable[BlockTableRecord.ModelSpace], OpenMode.ForWrite);

BlockTableRecord pBlockTblRec = transaction.GetObject(blocktable["我的块表"], OpenMode.ForRead) as BlockTableRecord;

BlockReference blocReference = new BlockReference(new Point3d(10, 10, 0), pBlockTblRec.ObjectId);

blockTblRec.AppendEntity(blocReference);

transaction.AddNewlyCreatedDBObject(blocReference, true);

mit();

}

3、创建带属性的块表

代码：

[CommandMethod("createattributeblk")]

public void CreateAttributeBlock()

{

StartTransaction();

blocktable = (BlockTable)transaction.GetObject(db.BlockTableId, OpenMode.ForWrite);

BlockTableRecord blocktablerec = new BlockTableRecord();

string blockName = "我的块表";

= blockName;

blocktablerec.Origin = new Point3d(0, 0, 0);

Point3d center = new Point3d(0, 0, 0);

DBPoint dbpoint = new DBPoint(center);

Circle circle = new Circle(center, new Vector3d(0, 0, 1), 0.25);

Polyline triangle = new Polyline(4);

triangle.AddVertexAt(0, new Point2d(0, 1), 0, 0, 0);

triangle.AddVertexAt(1, new Point2d(0.866, -0.5), 0, 0, 0);

triangle.AddVertexAt(2, new Point2d(-0.866, -0.5), 0, 0, 0);

triangle.AddVertexAt(3, new Point2d(0, 1), 0, 0, 0);

Point3d pPosition = new Point3d(1, 1, 0);

AttributeDefinition AttributeDef = new AttributeDefinition(pPosition, "坡头", "我的块表名", "输入我的块表名", db.Textstyle);

AttributeDef.Height = 1;

blocktablerec.Origin = new Point3d(1, 1, 0);

blocktablerec.AppendEntity(dbpoint);