c# cad二次开发，类库选择集交互

c# cad二次开发，类库选择集交互

using Autodesk.AutoCAD.ApplicationServices;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.EditorInput;
using Autodesk.AutoCAD.Geometry;
using Autodesk.AutoCAD.Runtime;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _05选择集
{
public class Class1
{
[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 ids = new List();
if (psr.Status == PromptStatus.OK)
{
SelectionSet sSet = psr.Value;
List points = this.GetPoint(sSet);
for (int i = 0; i {
PromptSelectionResult ss1 = ed.SelectCrossingWindow(points.ElementAt(i), points.ElementAt(i));
ids.AddRange(ss1.Value.GetObjectIds());
}
}
this.ChangeColor(ids);
}

    private List GetPoint(SelectionSet sSet){List points = new List();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){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();}}[CommandMethod("PickFirst", CommandFlags.UsePickSet)]public void PickFirst(){Database db = HostApplicationServices.WorkingDatabase;Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;PromptSelectionResult psr =  ed.SelectImplied();if (psr.Status == PromptStatus.OK){}else{}}
}

}

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