实现类似CAD中的Block创建块义命令程序
public void CreateBlock()
{
Database db = HostApplicationServices.WorkingDatabase;
Editor ed = Autodesk.<a href="http://bbs.mjtd.com/forum-41-1.html" target="_blank" class="relatedlink">AutoCAD</a>.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;
using (DocumentLock docLock = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.LockDocument())
{
ObjectId blockId = ObjectId.Null; //用于返回所创建的块的对象Id
BlockTableRecord record = new BlockTableRecord(); //创建一个BlockTableRecord类的对象，表示所要创建的块
record.Name = "MyBlock"; //设置块名
record.Origin = new Point3d(0, 0, 0); //设置块的基点
using (Transaction trans = db.TransactionManager.StartTransaction())
{
BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForWrite);//以写的方式打开块表
if (!bt.Has(record.Name))
{
//选择对象
PromptSelectionResult res = ed.GetSelection();
if (res.Status == PromptStatus.OK)
{
foreach (ObjectId id in res.Value.GetObjectIds())
{
Entity ent = trans.GetObject(id, OpenMode.ForWrite) as Entity;
Entity NewEnt = (Entity)ent.Clone();
record.AppendEntity(NewEnt);
}
}
bt.Add(record); //在块表中加入块
trans.AddNewlyCreatedDBObject(record, true);//通知事务处理
}
else
{
ed.WriteMessage("此图块名已存在,请检查!");
}
trans.Commit();
}
}
}
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