基于.net的CAD二次开发——筛选坐标点附近的文字信息

 public static ObjectId[] GetBo(double x, double y)
        {

            ObjectId[] objss;//这是文本对象的ID数组

            ArrayList arr = new ArrayList();

            Editor ed = MgdAcApplication.DocumentManager.MdiActiveDocument.Editor;

            TypedValue[] val = new TypedValue[]
                {new TypedValue (0,"TEXT") };//需要筛选的类型值
            SelectionFilter fil = new SelectionFilter(val);//选择过滤器
            PromptSelectionResult pro = ed.SelectAll(fil);//获取结果
            SelectionSet ss = pro.Value;//赋值给选择集

            objss = ss.GetObjectIds();//将选择集内对象ID赋值给ID数组

            for (int i = 0; i < objss.Length; i++)
            {
                //通过getdbject可以对文字对象进行读取
                DBText buftext = GetDBObject(objss[i]) as DBText;//遍历数组ID将对象赋值给单行文本
                Point3d po = buftext.Position;//获取单行文本的坐标点
                if (getDistance(po.X, po.Y, x, y) < 2.5)
                {
                    //将符合条件的文字放在数组中
                    arr.Add(objss[i]);//将所筛选出的单行文本对象放在数组中
                }
            }

            ObjectId[] objs = new ObjectId[arr.Count];//筛选后的文字ID数组

            for (int i = 0; i < arr.Count; i++)
            {
                //遍历集合获取他们的ID信息
                object a = arr[i];

                objs[i] = (ObjectId)a;
            }

            return objs;
        }