GetTextStyleTableId/GetRecordNames获取文字样式和图块名集合

        //获取文字样式，有则返回文字样式ObjectId，没有则创建并返回文字样式ObjectId
        public static ObjectId GetTextStyleTableId(string tbname)
        {
            ObjectId txtstyle = ObjectId.Null;
            using (Transaction tr = db.TransactionManager.StartTransaction())
            {
                TextStyleTable tst = (TextStyleTable)tr.GetObject(db.TextStyleTableId, OpenMode.ForWrite);
                //foreach (ObjectId item in tst)
                //{
                //    TextStyleTableRecord tstr = (TextStyleTableRecord)tr.GetObject(item, OpenMode.ForWrite);
                //    if (tbname.Equals(tstr.Name)) txtstyle = item;
                //}
                if (tst.Has(tbname)) txtstyle = tst[tbname];
                else
                {
                    TextStyleTableRecord tstr = new TextStyleTableRecord
                    {
                        Name = tbname,
                        TextSize = 3,
                        PriorSize = 3,
                        XScale = 0.7,
                        Font = new FontDescriptor("宋体", false, false, 134, 2)
                    };
                    tst.UpgradeOpen();//切换的文字样式表的状态为写以添加新的的文字样式
                    tst.Add(tstr);//将新建的文字样式表记录的信息添加到文字样式表中
                    //把的文字样式表记录添加到事务处理中
                    tr.AddNewlyCreatedDBObject(tstr, true);
                    tst.DowngradeOpen();//为了安全，将文字样式表的状态切换为读
                    tr.Commit();
                    txtstyle = tstr.ObjectId;
                }
            }
            return txtstyle;
        }
        //CAD 数据库包含以下9个符号表及符号表记录：
        //  BlockTable(块表)-BlockTableRecord(块表记录)
        //  LayerTable(图层表)-LayerTableRecord(图层表记录)
        //  TextStyleTable(文字样式表)-TextStyleTableRecord(文字样式表记录)
        //  DimStyleTable(尺寸样式表)-DimStyleTableRecord(尺寸样式表记录)
        //  LinetypeTable(线型表)-LinetypeTableRecord(线型表记录)
        //  UcsTable(用户坐标系表)-UcsTableRecord用户坐标系表记录)
        //  ViewTable(视图表)-ViewTableRecord(视图表记录)
        //  ViewportTable(视口表)-ViewportTableRecord(视口表记录)
        //  RegAppTable(应用程序注册表)-RegAppTableRecord(应用程序注册表记录)
        /// <summary>
        /// 获取符合过滤条件的符号表记录名字集合
        /// </summary>
        /// <typeparam name="TTable">符号表</typeparam>
        /// <typeparam name="TRecord">符号表记录</typeparam>
        /// <param name="tableid"></param>
        /// <returns>记录的名字集合</returns>
        public static List<string> GetRecordNames<TTable, TRecord>(ObjectId tableid) where TTable : SymbolTable where TRecord : SymbolTableRecord
        {
            List<string> lst = new List<string>();
            bool filter(TRecord tstr)
            {
                return !string.IsNullOrEmpty(tstr.Name) && !Regex.IsMatch(tstr.Name, "(\\*.*|.*\\|.*)") && (!(tstr is LayerTableRecord tstrl) || !tstrl.IsLocked);
            }
            using (Transaction tr = HostApplicationServices.WorkingDatabase.TransactionManager.StartTransaction())
            {
                TTable tst = (TTable)tr.GetObject(tableid, OpenMode.ForWrite);
                lst.AddRange(from ObjectId id in tst
                             let record = (TRecord)tr.GetObject(id, OpenMode.ForWrite)
                             where filter(record)
                             select record.Name);
            }
            return lst;
        }
=======================================================================================================================================================
        /// <summary>
        /// 获取符合过滤条件的符号表记录名字集合
        /// </summary>
        /// <typeparam name="TTable">符号表</typeparam>
        /// <typeparam name="TRecord">符号表记录</typeparam>
        /// <param name="tableid"></param>
        /// <returns>记录的名字集合</returns>
        public static IEnumerable<string> GetRecordNames<TTable, TRecord>(ObjectId tableid) where TTable : SymbolTable where TRecord : SymbolTableRecord
        {
            bool filter(TRecord tstr)
            {
                return !string.IsNullOrEmpty(tstr.Name) && !Regex.IsMatch(tstr.Name, "(\\*.*|.*\\|.*)") && (!(tstr is LayerTableRecord tstrl) || !tstrl.IsLocked);
            }
            using (Transaction tr = db.TransactionManager.StartTransaction())
            {
                TTable tst = (TTable)tr.GetObject(tableid, OpenMode.ForWrite);
                foreach (ObjectId id in tst)
                {
                    TRecord record = (TRecord)tr.GetObject(id, OpenMode.ForWrite);
                    if (filter(record))
                    {
                        yield return record.Name;
                    }
                }
            }
        }