[ARX程序]：急!!!请教晓东

magyar

acedCommand (RTSTR,"_pline",RTSTR,"指定起点",RTNONE);
这个命令之后我通过反映器commadEnded得到了命令结束时候的消息后需要将一个扩展数据附给所画的多段线..
但是因为acdbOpenObject在commadEnded之后不能打开实体
请晓东帮忙解决这个问题

ishou

ref. below pls:
-----------------------------
AcTransaction::getObject Function virtual Acad::ErrorStatus

getObject(

AcDbObject*& obj,

AcDbObjectId objectId,

AcDb::OpenMode mode,

bool openErasedObject = false) = 0;

obj Returns pointer to obtained object
objectId Input objectId of object to obtain
mode Input mode to obtain in
openErasedObject Input Boolean indicating whether to obtain erased objects

This function is the transaction equivalent of acdbOpenObject. A pointer to the object identified by objectId is obtained under the transaction and returned in the obj argument. The mode argument specifies how the object is to be treated--as AcDb::kForRead, AcDb::kForWrite, or AcDb::kForNotify. If the openErasedObject Boolean is true, then even an erased object can be obtained. If openErasedObject is false, then trying to obtain an erased entity results in an error return value.

Returns Acad::eOk if successful. If openErasedObject is false, then trying to obtain an erased object results in a return status of Acad::eWasErased. If there are currently no transactions, then it returns Acad::eNoActiveTransactions.

Reminder Obtaining an object pointer via getObject() runs in parallel with acdbOpenObject(). This means that both can be in effect at the same time with AcDb::kForWrite status in both. For more information, see the section on transactions in the ObjectARX Developer's Guide.
[/COLOR]
Note This function is duplicated in the AcTransactionManager class where it always operates on the topmost AcTransaction object (by calling the getObject() function in the topmost transaction object). Only the topmost transaction is allowed to obtain entities, so using the AcTransactionManager version of this function is safer and easier.

Hellow

在这种问题上要使用事务管理，很容易出问题：它要求必须是顶层事务对象。

magyar

如何解决这个问题呢？请详细点说明好吗

ishou

最初由 Hellow 发布
[B]在这种问题上要使用事务管理，很容易出问题：它要求必须是顶层事务对象。 [/B]

-------------
在我的成功试例中有点意外，不是顶层事务的对象也可以get 到
(也许是我理解有错？)
下面代码处在 *** ::commandEnded() 中：

1. 
   
2.     struct resbuf      xData=NULL;
   
3.     AcDbObjectId       ObjId;
   
4.     AcDbEntity       *pEnt=NULL;
   
5.     AcTransactionManager *acTrans;
   
6. 
   
7.     .....
   
8.     // get the object  ID >>   ObjId;     (from acdbEntLast()...?)
   
9.     .....
   
10.     // build  xData list  >>>   xData;
    
11.     .....
    
12. 
    
13.     acTrans = acTransactionManagerPtr();
    
14.     acTrans->startTransaction();
    
15.     acTrans->getObject( (AcDbObject *&)pEnt, ObjId, AcDb::kForWrite, FALSE);
    
16.     pEnt->setXData( xData);
    
17.     pEnt->close();
    
18.     acTrans->endTransaction();
    

复制代码

magyar

呵呵..我已经解决了..谢谢了