CAD二次开发（6）-用户交互之选择集

1. 简单测试

测试让选中的图形描红

 [CommandMethod("SeleDemo")]public void SeleDemo(){Database db = HostApplicationServices.WorkingDatabase;Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;PromptSelectionResult psr = ed.GetSelection();if (psr.Status == PromptStatus.OK){SelectionSet sSet = psr.Value;this.ChangeColor(sSet);}}private void ChangeColor(SelectionSet sSet){ObjectId[] ids = sSet.GetObjectIds();Database db = HostApplicationServices.WorkingDatabase;using (Transaction trans = db.TransactionManager.StartTransaction()){for (int i = 0; i < ids.Length; i++){Entity ent = (Entity)ids[i].GetObject(OpenMode.ForWrite);ent.ColorIndex = 1;}trans.Commit();}}

在这里插入图片描述

2. 选择集API说明

在这里插入图片描述

3. 案例说明

 [CommandMethod("SeleDemo")]public void SeleDemo(){Database db = HostApplicationServices.WorkingDatabase;Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;//PromptSelectionResult psr =  ed.SelectAll();TypedValue[] values = new TypedValue[]{new TypedValue((int)DxfCode.Start,"circle")};SelectionFilter filter = new SelectionFilter(values);//PromptSelectionResult psr = ed.GetSelection(filter);//if (psr.Status == PromptStatus.OK)//{//    SelectionSet sSet = psr.Value;//    this.ChangeColor(sSet);//}PromptSelectionResult psr = ed.GetSelection(filter);List<ObjectId> ids = new List<ObjectId>();if (psr.Status == PromptStatus.OK){SelectionSet sSet = psr.Value;List<Point3d> points = this.GetPoint(sSet);for (int i = 0; i <points.Count; i++){PromptSelectionResult ss1 = ed.SelectCrossingWindow(points.ElementAt(i), points.ElementAt(i));ids.AddRange(ss1.Value.GetObjectIds());}}this.ChangeColor(ids);}private List<Point3d> GetPoint(SelectionSet sSet){List<Point3d> points = new List<Point3d>();ObjectId[] ids = sSet.GetObjectIds();Database db = HostApplicationServices.WorkingDatabase;using (Transaction trans = db.TransactionManager.StartTransaction()){for (int i = 0; i < ids.Length; i++){Entity ent = (Entity)ids[i].GetObject(OpenMode.ForRead);Point3d center = ((Circle)ent).Center;double radius = ((Circle)ent).Radius;points.Add(new Point3d(center.X + radius, center.Y, center.Z));}trans.Commit();}return points;}private void ChangeColor(SelectionSet sSet){ObjectId[] ids = sSet.GetObjectIds();Database db = HostApplicationServices.WorkingDatabase;using (Transaction trans = db.TransactionManager.StartTransaction()){for (int i = 0; i <ids.Length; i++){Entity ent = (Entity)ids[i].GetObject(OpenMode.ForWrite);ent.ColorIndex = 1;}trans.Commit();}}private void ChangeColor(List<ObjectId> ids){Database db = HostApplicationServices.WorkingDatabase;using (Transaction trans = db.TransactionManager.StartTransaction()){for (int i = 0; i < ids.Count; i++){Entity ent = (Entity)ids[i].GetObject(OpenMode.ForWrite);ent.ColorIndex = 3;}trans.Commit();}}