TBox生成文字外框1.1（2020.12.11终版）

调试环境：中望CAD2014；
引用：ZwDatabaseMgd.dll、ZwManaged.dll两个类库！

using System;
using ZwSoft.ZwCAD.ApplicationServices;
using ZwSoft.ZwCAD.DatabaseServices;
using ZwSoft.ZwCAD.EditorInput;
using ZwSoft.ZwCAD.Geometry;
using ZwSoft.ZwCAD.Runtime;
namespace TextBox
{
    public static class Class1
    {
        [CommandMethod("TBox")]
        public static void MakeTextBox()
        {
            SelectionSet ss = SelectOnScreen(new TypedValue[] { new TypedValue(0, "*TEXT") });//ed.GetSelection().Value;
            foreach (ObjectId id in ss.GetObjectIds())
            {
                id.MakeRectangle();
            }
        }
        /// <summary>
        /// 创建文字外框
        /// </summary>
        /// <param name="id">旋转对象ObjectId</param>
        /// <param name="center">旋转中心点</param>
        /// <param name="degree">旋转弧度</param>
        public static void MakeRectangle(this ObjectId id)//, Point3d center, double degree, double wl, double wr, double hb, double ht
        {
            bool ismtxt = false;
            double degree = 0, wl = 0, wr = 0, ht = 0, hb = 0;
            Point3d center = new Point3d(0, 0, 0), minpt = new Point3d(0, 0, 0), maxpt = new Point3d(0, 0, 0);
            Database db = HostApplicationServices.WorkingDatabase;
            using (Transaction tr = db.TransactionManager.StartTransaction())
            {
                //打开块表
                //BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForRead);
                //打开块表记录
                //BlockTableRecord btr = (BlockTableRecord)trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
                //打开块表记录
                BlockTableRecord btr = tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite) as BlockTableRecord;
                Entity ent = (Entity)id.GetObject(OpenMode.ForWrite);
                if ("MText".Equals(ent.GetType().Name, StringComparison.CurrentCultureIgnoreCase))
                {
                    MText mtxt = (MText)ent;
                    ismtxt = true;
                    double width = mtxt.ActualWidth;
                    double height = mtxt.ActualHeight;
                    switch (mtxt.Attachment)
                    {
                        case AttachmentPoint.TopCenter:
                        case AttachmentPoint.MiddleCenter:
                        case AttachmentPoint.BottomCenter:
                            wl = width * -0.5;
                            break;
                        case AttachmentPoint.TopRight:
                        case AttachmentPoint.MiddleRight:
                        case AttachmentPoint.BottomRight:
                            wl = -width;
                            break;
                        default:
                            wl = 0.0;
                            break;
                    }
                    switch (mtxt.Attachment)
                    {
                        case AttachmentPoint.TopLeft:
                        case AttachmentPoint.TopCenter:
                        case AttachmentPoint.TopRight:
                            hb = -height;
                            break;
                        case AttachmentPoint.MiddleLeft:
                        case AttachmentPoint.MiddleCenter:
                        case AttachmentPoint.MiddleRight:
                            hb = height * -0.5;
                            break;
                        default:
                            hb = 0.0;
                            break;
                    }
                    wr = width + wl;
                    ht = height + hb;
                    degree = mtxt.Rotation;
                    center = mtxt.Location;
                }
                else if ("DBText".Equals(ent.GetType().Name, StringComparison.CurrentCultureIgnoreCase))
                {
                    DBText txt = (DBText)ent;
                    ismtxt = false;
                    degree = txt.Rotation;
                    center = txt.Position;
                }
                ent.TransformBy(Matrix3d.Rotation(-degree, Vector3d.ZAxis, center));
                Extents3d textExtents = ent.GeometricExtents;
                ent.TransformBy(Matrix3d.Rotation(degree, Vector3d.ZAxis, center));
                if (ismtxt)
                {
                    minpt = new Point3d(center.X + wl, center.Y + hb, 0);
                    maxpt = new Point3d(center.X + wr, center.Y + ht, 0);
                }
                else
                {
                    minpt = textExtents.MinPoint;
                    maxpt = textExtents.MaxPoint;
                }
                Polyline pl = db.AddRectToModelSpace(minpt, maxpt);
                pl.TransformBy(Matrix3d.Rotation(degree, Vector3d.ZAxis, center));
                //添加图形到块表记录
                btr.AppendEntity(pl);
                //更新数据信息
                tr.AddNewlyCreatedDBObject(pl, true);
                //提交事务
                tr.Commit();
            }
        }
        /// <summary>
        /// 通过两点绘制矩形
        /// </summary>
        /// <param name="db">图形数据库</param>
        /// <param name="point1">第一点</param>
        /// <param name="point2">第二点</param>
        /// <returns>Entity图形</returns>
        public static Polyline AddRectToModelSpace(this Database db, Point3d point1, Point3d point2)
        {
            //声明多段线
            Polyline pline = new Polyline();
            //计算矩形的四个顶点
            Point2d p1 = new Point2d(Math.Min(point1.X, point2.X), Math.Min(point1.Y, point2.Y));
            Point2d p2 = new Point2d(Math.Max(point1.X, point2.X), Math.Min(point1.Y, point2.Y));
            Point2d p3 = new Point2d(Math.Max(point1.X, point2.X), Math.Max(point1.Y, point2.Y));
            Point2d p4 = new Point2d(Math.Min(point1.X, point2.X), Math.Max(point1.Y, point2.Y));
            //添加多段线的顶点
            pline.AddVertexAt(0, p1, 0, 0, 0);
            pline.AddVertexAt(1, p2, 0, 0, 0);
            pline.AddVertexAt(2, p3, 0, 0, 0);
            pline.AddVertexAt(3, p4, 0, 0, 0);
            //闭合多段线
            pline.Closed = true;
            return pline;
        }
        /// <summary>
        /// 通过组码获取对象
        /// </summary>
        /// <param name="value">组码数组</param>
        /// <returns>选择集</returns>
        public static SelectionSet SelectOnScreen(TypedValue[] value)
        {
            Editor ed = Application.DocumentManager.MdiActiveDocument.Editor;
            SelectionFilter filter = new SelectionFilter(value);
            PromptSelectionResult psr = ed.GetSelection(filter);
            if (psr.Status == PromptStatus.OK)
            {
                return psr.Value;
            }
            return null;
        }
    }
}