.net中取得CAD的當前圖層名稱

標籤：os   資料   art   for   cti   io   

 /// <summary>
        /// 取得當前圖層名稱
        /// </summary>
        /// <param name="db">資料庫物件</param>
        /// <returns></returns>
        public  static string  GetCurrentLayer(this Database db)
        {
            //Database db = HostApplicationServices.WorkingDatabase;
            using (Transaction trans = db.TransactionManager.StartTransaction())
            {
                //擷取當前圖形中所有顏色為紅色的圖層層名
                var CurrentLayer = (from layer in db.GetAllLayers()
                                 where layer.Id==db.Clayer
                                 select layer.Name).ToList();
                return CurrentLayer[0];
                trans.Commit();
            }
        }

上面這個辦法比較麻煩，可以按下面的辦法做：

        /// <summary>
        /// 取得當前圖層名稱
        /// </summary>
        /// <param name="db">資料庫物件</param>
        /// <returns></returns>
        public  static string  GetCurrentLayer(this Database db)
        {
            using (Transaction trans = db.TransactionManager.StartTransaction())
            {
                LayerTableRecord ltr = (LayerTableRecord)db.Clayer.GetObject(OpenMode.ForRead);
                return ltr.Name;
                trans.Commit();
            }
        }