CAD.net 二次開發--輸出點名和點座標，點類型

[CommandMethod("aa", CommandFlags.UsePickSet)]
        public void aa()
        {
            Database db = HostApplicationServices.WorkingDatabase;
            Document doc = Application.DocumentManager.MdiActiveDocument;
            Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
            // PromptSelectionOptions opt = new PromptSelectionOptions("\n請選擇點名和點的牽引線");
            PromptSelectionResult psr = ed.GetSelection();
            if (psr.Status != PromptStatus.OK) return;
            SelectionSet ss = psr.Value;
            if (ss.Count != 2) { ed.WriteMessage("請選擇 點名 和 點的牽引線"); return; }
            string pointname = "";
            string pointtype = "";
            Point3d pout = new Point3d();
            Polyline pointpl = new Polyline();
            Point3dCollection points = new Point3dCollection();
            using (Transaction trans = db.TransactionManager.StartTransaction())
            {
                foreach (ObjectId id in ss.GetObjectIds())
                {
                    DBText text = trans.GetObject(id, OpenMode.ForRead) as DBText;
                    if (text != null) pointname = text.TextString;
                    Polyline pl = trans.GetObject(id, OpenMode.ForRead) as Polyline;
                    if (pl != null)
                    {
                        pointpl = pl;
                        for (int i = 0; i < pl.NumberOfVertices; i++)
                        {
                            points.Add(pl.GetPoint3dAt(i));
                        }
                    }

                }
                trans.Commit();
            }
            if (points.Count != 3) { ed.WriteMessage("請確保點的牽引線正確，是否僅有3個節點"); }
            if (points[0].Y == points[1].Y) { pout = points[2]; }

            if (points[0].Y == points[2].Y) { pout = points[1]; }

            if (points[1].Y == points[2].Y) { pout = points[0]; }
            else { ed.WriteMessage("請確保點的引線有一端水平"); return; }
            ///////導出點類型
            PromptKeywordOptions pkey = new PromptKeywordOptions("\n請選擇點類型[彎頭(1)/閥門(2)/直線點(3)/三通(4)/變頸(5)/上下翻(6)/其餘（7）]<1>");
            pkey.Keywords.Add("1");
            pkey.Keywords.Add("2");
            pkey.Keywords.Add("3");
            pkey.Keywords.Add("4");
            pkey.Keywords.Add("5");
            pkey.Keywords.Add("6");
            pkey.Keywords.Add("7");
            pkey.Keywords.Default = "1";
            pkey.AppendKeywordsToMessage = false;
            here:
            PromptResult pr = ed.GetKeywords(pkey);
            //ed.WriteMessage("輸入關鍵字"+pr.StringResult);
           
                switch (pr.StringResult)
                {
                    case "1":
                        pointtype = "彎頭";
                        //ed.WriteMessage("hhhhhhhhhhhhhhhhhhhhhhh");
                        ed.WriteMessage("\n您選擇的點類型爲："+pointtype);
                        break;
                    case "2":
                        pointtype = "閥門";
                        ed.WriteMessage("\n您選擇的點類型爲：" + pointtype);
                        break;
                    case "3":
                        pointtype = "直線點";
                        ed.WriteMessage("\n您選擇的點類型爲：" + pointtype);
                        break;
                    case "4":
                        pointtype = "三通";
                        ed.WriteMessage("\n您選擇的點類型爲：" + pointtype);
                        break;
                    case "5":
                        pointtype = "變徑";
                        ed.WriteMessage("\n您選擇的點類型爲：" + pointtype);
                        break;
                    case "6":
                        pointtype = "上下翻";
                        ed.WriteMessage("\n您選擇的點類型爲：" + pointtype);
                        break;
                    case "7":
                        ed.WriteMessage("\n您選擇的點類型爲：空值");
                        break;
                    default:


                        ed.WriteMessage("\n輸入了無效關鍵字，請從新輸入：");
                      //  break;
                     goto here;
               
            }
            //ed.WriteMessage(pointtype);
            //////結果的輸出///////////////
            string path = "D:\\新輸出點.csv";
            FileStream fs = new FileStream(path, FileMode.Append);
            StreamWriter sw = new StreamWriter(fs,Encoding.GetEncoding("gb2312"));
            sw.WriteLine(pointname + "," + pout.X.ToString() + "," + pout.Y.ToString() + "," + pointtype);
            sw.Close();
            fs.Close();

學習點：

一、文本的輸出，轉碼

二、用戶互交，關鍵字的使用

三、疑問點，明明沒有用pickfirst，爲何也有pickkfirst的效果？？？？