AutoCAD二次開發（.Net）之設定MText字型(1)

[CommandMethod("SetFont")]
        public void CreateMText()
        {
            Document doc = Application.DocumentManager.MdiActiveDocument;
            Database db = doc.Database;
            Editor ed = doc.Editor;
            DocumentLock dl = doc.LockDocument();
            try
            {
                using (Transaction tr = db.TransactionManager.StartTransaction())
                {
                    BlockTable blockTbl = tr.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;
                    BlockTableRecord modelSpace = tr.GetObject(blockTbl[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;
                    MText mt = new MText();
                    mt.Contents = "ABCDE";
                    mt.TextStyleId = AddTextStyle("宋體", "1", "3", 20, 20,db);
                    mt.Width = 3.5;
                    mt.Height = 3.5;
                    mt.Location = Point3d.Origin;
                    modelSpace.AppendEntity(mt);
                    tr.AddNewlyCreatedDBObject(mt, true);
                    tr.Commit();
                }
            }
            catch { }
            dl.Dispose();
        }
        public static ObjectId AddTextStyle(string name, string smallfont, string bigfont, double height, double xscale,Database dbH,Transaction trans)
        {
           TextStyleTable TST = (TextStyleTable)trans.GetObject(dbH.TextStyleTableId, OpenMode.ForWrite);
           ObjectId id = GetIdFromSymbolTable(TST, name,dbH,trans);
           if (id == ObjectId.Null)
           {
                TextStyleTableRecord TSTR = new TextStyleTableRecord();
                TSTR.Name = name;
                TSTR.FileName = smallfont;
                TSTR.BigFontFileName = bigfont;
                TSTR.TextSize = height;
                TSTR.XScale = xscale;
                TST.UpgradeOpen();
                id = TST.Add(TSTR);
                trans.AddNewlyCreatedDBObject(TSTR, true);
           }
           return id;
        }

        //取得符号表的Id
        public static ObjectId GetIdFromSymbolTable(SymbolTable st, string key,Database dbH,Transaction trans)
        {
           if (st.Has(key))
           {
              ObjectId idres = st[key];
              if (!idres.IsErased)
                  return idres;
              foreach (ObjectId id in st)
              {
                  if (!id.IsErased)
                  {
                     SymbolTableRecord str = (SymbolTableRecord)trans.GetObject(id, OpenMode.ForRead);
                     if (str.Name == key)
                         return id;
                  }
              }
            }
            return ObjectId.Null;
        }