[实体对象] 请教：修改标注箭头形式时出错

萧闫子

1. [CommandMethod("t5")]
   
2. public void Test5()
   
3. {
   
4. Document doc=Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
   
5. Database db = doc.Database;
   
6. using (Transactiontr=doc.Database.TransactionManager.StartTransaction())
   
7. {
   
8. DimStyleTable dst=tr.GetObject(db.DimStyleTableId,OpenMode.ForRead) as DimStyleTable;
   
9. DimStyleTableRecord dstr=tr.GetObject(dst["ISO-25"],OpenMode.ForRead) as DimStyleTableRecord;
   
10. BlockTable bt = tr.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;
    
11. if (bt.Has("_ARCHTICK"))
    
12. {
    
13. dstr.UpgradeOpen();
    
14. dstr.Dimblk1 = bt["_ARCHTICK"];
    
15. dstr.Dimblk2 = bt["_ARCHTICK"];
    
16. }
    
17. tr.Commit();
    
18. }
    
19. }

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大家帮忙看一下，哪里出了问题，我想把那箭头改为建筑用的斜杠，但是出错了。