autocad.net的反应器示例
时间: 2023-05-19 18:06:13 浏览: 62
以下是一个简单的 AutoCAD .NET 反应器示例:
using Autodesk.AutoCAD.Runtime;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.EditorInput;
namespace ReactorExample
{
public class MyReactor : ObjectReactor
{
public override void Erased(object sender, ObjectErasedEventArgs e)
{
Document doc = Application.DocumentManager.MdiActiveDocument;
Editor ed = doc.Editor;
ed.WriteMessage("\nObject {0} has been erased.", e.DBObject.ObjectId);
}
}
public class Commands
{
[CommandMethod("AddReactor")]
public void AddReactor()
{
Document doc = Application.DocumentManager.MdiActiveDocument;
Database db = doc.Database;
using (Transaction tr = db.TransactionManager.StartTransaction())
{
BlockTable bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead);
BlockTableRecord btr = (BlockTableRecord)tr.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
Circle circle = new Circle(new Point3d(0, 0, 0), Vector3d.ZAxis, 1);
btr.AppendEntity(circle);
tr.AddNewlyCreatedDBObject(circle, true);
MyReactor reactor = new MyReactor();
circle.AddReactor(reactor);
tr.Commit();
}
}
}
}
这个示例创建了一个圆形,并向其添加了一个反应器。当圆形被删除时,反应器会在命令行窗口中输出一条消息。
请注意,这只是一个简单的示例,实际应用中可能需要更复杂的逻辑和错误处理。