很奇怪的错误提示：!dbobji.cpp@7227:eNotOpenForWrite

zjh2785

我明明是以写的模式打开的，为什么会出现这种错误呢？
刚接触C#  好多东西还在摸索，希望路过的高手帮下忙。

我先贴出部分代码：

1. //这是另外一个类的，这两行应该是没问题的。
   
2. mDoc = Application. DocumentManager. MdiActiveDocument;
   
3. mDb = mDoc. Database;
   
4. 
   
5. public class MySymbolTableRecord
   
6. {
   
7.    protected ObjectId AddEntity (BlockTableRecord btRecord, Entity ent)
   
8.    {
   
9.     ObjectId ObjId;
   
10.     using (Transaction tran = mDb. TransactionManager. StartTransaction( ))
    
11.     {
    
12.      //调试的时候每次都是运行到这位置就出错了
    
13.      //内部错误： !dbobji.cpp@7227:eNotOpenForWrite
    
14.      ObjId = btRecord. AppendEntity(ent);
    
15.      tran. AddNewlyCreatedDBObject(ent, true);
    
16.      tran. Commit( );
    
17.      }
    
18.      return ObjId;
    
19.      }
    
20.      protected DBObject GetDBObject (ObjectId id, OpenMode mode)
    
21.       {
    
22.      DBObject dbObj;
    
23.      using (Transaction tran = mDb. TransactionManager. StartTransaction( ))
    
24.      {
    
25.      dbObj = tran. GetObject(id, mode);
    
26.      }
    
27.      return dbObj;
    
28.      }
    
29. }
    
30. 
    
31. public class Drawing : MySymbolTableRecord
    
32. {
    
33.      private BlockTableRecord mBlkTabRec;
    
34.      private Calculation mCalc;
    
35.      public Drawing ( )//构造函数
    
36.      {
    
37.      mBlkTabRec = GetDBObject(mDb. CurrentSpaceId, OpenMode. ForWrite) as BlockTableRecord;
    
38.      mCalc = new Calculation( );
    
39.      }
    
40.      public ObjectId AddLine (Point2d ptStart, Point2d ptEnd)//画直线
    
41.      {
    
42.      Line line = new Line(mCalc. P2ToP3(ptStart), mCalc. P2ToP3(ptEnd));
    
43.      return AddEntity(mBlkTabRec, line);
    
44.      }
    
45.    ｝
    
46. 
    

//这是另外一个类的，这两行应该是没问题的。<br /> mDoc = Application. DocumentManager. MdiActiveDocument;<br /> mDb = mDoc. Database;<br /> <br /> public class MySymbolTableRecord<br /> {<br />    protected ObjectId AddEntity (BlockTableRecord btRecord, Entity ent)<br />    {<br />     ObjectId ObjId;<br />     using (Transaction tran = mDb. TransactionManager. StartTransaction( ))<br />     {<br />      //调试的时候每次都是运行到这位置就出错了<br />      //内部错误： !dbobji.cpp@7227:eNotOpenForWrite<br />      ObjId = btRecord. AppendEntity(ent);<br />      tran. AddNewlyCreatedDBObject(ent, true);<br />      tran. Commit( );<br />      }<br />      return ObjId;<br />      }<br />      protected DBObject GetDBObject (ObjectId id, OpenMode mode)<br />       {<br />      DBObject dbObj;<br />      using (Transaction tran = mDb. TransactionManager. StartTransaction( ))<br />      {<br />      dbObj = tran. GetObject(id, mode);<br />      }<br />      return dbObj;<br />      }<br /> }<br /> <br /> public class Drawing : MySymbolTableRecord<br /> {<br />      private BlockTableRecord mBlkTabRec;<br />      private Calculation mCalc;<br />      public Drawing ( )//构造函数<br />      {<br />      mBlkTabRec = GetDBObject(mDb. CurrentSpaceId, OpenMode. ForWrite) as BlockTableRecord;<br />      mCalc = new Calculation( );<br />      }<br />      public ObjectId AddLine (Point2d ptStart, Point2d ptEnd)//画直线<br />      {<br />      Line line = new Line(mCalc. P2ToP3(ptStart), mCalc. P2ToP3(ptEnd));<br />      return AddEntity(mBlkTabRec, line);<br />      }<br />    ｝<br /> <br />

zjh2785

难道要每个方法都要用一次Transaction 吗？那样感觉很麻烦啊。